CA2486240A1 - Switched resonant ultrasonic power amplifier system - Google Patents
Switched resonant ultrasonic power amplifier system Download PDFInfo
- Publication number
- CA2486240A1 CA2486240A1 CA002486240A CA2486240A CA2486240A1 CA 2486240 A1 CA2486240 A1 CA 2486240A1 CA 002486240 A CA002486240 A CA 002486240A CA 2486240 A CA2486240 A CA 2486240A CA 2486240 A1 CA2486240 A1 CA 2486240A1
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- CA
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- Prior art keywords
- signal
- generating
- compensated
- output
- driver
- Prior art date
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Classifications
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/80—Constructional details
- H10N30/802—Drive or control circuitry or methods for piezoelectric or electrostrictive devices not otherwise provided for
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N7/00—Ultrasound therapy
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/0207—Driving circuits
- B06B1/0223—Driving circuits for generating signals continuous in time
- B06B1/0238—Driving circuits for generating signals continuous in time of a single frequency, e.g. a sine-wave
- B06B1/0246—Driving circuits for generating signals continuous in time of a single frequency, e.g. a sine-wave with a feedback signal
- B06B1/0253—Driving circuits for generating signals continuous in time of a single frequency, e.g. a sine-wave with a feedback signal taken directly from the generator circuit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/0207—Driving circuits
- B06B1/0223—Driving circuits for generating signals continuous in time
- B06B1/0238—Driving circuits for generating signals continuous in time of a single frequency, e.g. a sine-wave
- B06B1/0246—Driving circuits for generating signals continuous in time of a single frequency, e.g. a sine-wave with a feedback signal
- B06B1/0261—Driving circuits for generating signals continuous in time of a single frequency, e.g. a sine-wave with a feedback signal taken from a transducer or electrode connected to the driving transducer
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N7/00—Ultrasound therapy
- A61N2007/0056—Beam shaping elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B2201/00—Indexing scheme associated with B06B1/0207 for details covered by B06B1/0207 but not provided for in any of its subgroups
- B06B2201/70—Specific application
- B06B2201/76—Medical, dental
Abstract
A switched resonant power amplifier system for ultrasonic transducers is disclosed. The system includes an amplifier that receives and processes a driver output signal for generating a drive signal that is provided to an ultrasonic device for controlling output of the ultrasonic device. An output control circuit receives and processes a signal related to a feedback signal generated by the ultrasonic device and a divider reference signal, and generates a compensated clack signal that is adjusted for at least one of phase and frequency differences between the received feedback signal and the divider reference signal. A compensated drive circuit receives and processes the compensated clock signal for generating the divider reference signal, and for generating the driver output signal.
Claims (23)
1. A system for controlling an output of an ultrasonic device, the system comprising:
an amplifier receiving and processing a driver output signal for generating a drive signal that is provided to an ultrasonic device for controlling output of the ultrasonic device;
an output control circuit receiving and processing a signal related to a feedback signal generated by the ultrasonic device and a divider reference signal for generating a compensated clock signal that is adjusted for at least one of phase and frequency differences between the received feedback signal and the divider reference signal; and a compensated drive circuit receiving and processing the compensated clock signal for generating the divider reference signal, and for generating the driver output signal.
an amplifier receiving and processing a driver output signal for generating a drive signal that is provided to an ultrasonic device for controlling output of the ultrasonic device;
an output control circuit receiving and processing a signal related to a feedback signal generated by the ultrasonic device and a divider reference signal for generating a compensated clock signal that is adjusted for at least one of phase and frequency differences between the received feedback signal and the divider reference signal; and a compensated drive circuit receiving and processing the compensated clock signal for generating the divider reference signal, and for generating the driver output signal.
2. The system of Claim 1, wherein the feedback signal is indicative of the output of the ultrasonic device, and the output of the ultrasonic device is controlled in real time.
3. The system of Claim 1, wherein the amplifier is a switched resonant power amplifier.
4. The system of Claim 3, wherein the switched resonant power amplifier includes a transformer having primary and secondary windings, wherein the drive signal is coupled to the secondary winding of the transformer.
5. The system of Claim 3, wherein the switched resonant power amplifier includes at least one tuning circuit having a tuned period selected to correspond to a particular resonant frequency of the driver output signal.
6. The system of Claim 1, wherein the output control circuit comprises a wave shaping circuit receiving and processing the feedback signal and generating a square wave reset signal having a substantially identical frequency to the feedback signal.
7. The system of Claim 6, wherein the reset signal has a waveform that is substantially 180° out-of-phase with respect to the feedback signal.
8. The system of Claim 1, wherein the output control circuit includes a compensating circuit operatively coupled to the compensated drive circuit, the compensating circuit having a phase locked loop (PLL).
9. The system of Claim 8, wherein the PLL processes at least one analog signal and outputs the compensated clock signal.
10. The system of Claim 6, wherein the wave shaping circuit comprises:
a zero crossing detector receiving and processing the feedback signal and generating a corresponding square wave signal; and a comparator comparing the square wave signal to a reference signal for generating the reset signal.
a zero crossing detector receiving and processing the feedback signal and generating a corresponding square wave signal; and a comparator comparing the square wave signal to a reference signal for generating the reset signal.
11. The system of Claim 8, wherein:
the output control circuit comprises a wave shaping circuit receiving and processing the feedback signal and generating a square wave reset signal having a frequency substantially identical to the feedback signal;
the compensating circuit receives and processes the reset signal for generating a compensated reference signal having substantially the same frequency as the reset signal and substantially 180° out-of-phase with respect to the reset signal, wherein frequency and amplitude characteristics of the compensated reference signal are determined at least by the reset signal; and wherein the PLL receives and processes first and second input signals, wherein the first input signal is the compensated reference signal, and the second input signal is the divider reference signal, and wherein the PLL processes the first and second input signals for generating the compensated clock signal.
the output control circuit comprises a wave shaping circuit receiving and processing the feedback signal and generating a square wave reset signal having a frequency substantially identical to the feedback signal;
the compensating circuit receives and processes the reset signal for generating a compensated reference signal having substantially the same frequency as the reset signal and substantially 180° out-of-phase with respect to the reset signal, wherein frequency and amplitude characteristics of the compensated reference signal are determined at least by the reset signal; and wherein the PLL receives and processes first and second input signals, wherein the first input signal is the compensated reference signal, and the second input signal is the divider reference signal, and wherein the PLL processes the first and second input signals for generating the compensated clock signal.
12. The system of Claim 11, wherein the PLL generates at least one of a frequency error signal and a phase error signal for compensating the compensated clock signal for at least one of phase and frequency relative to the compensated reference signal.
13. The system of Claim 12, wherein the PLL includes delay circuitry for adjusting the phase of the compensated clock signal in accordance with the phase error signal.
14. The system of Claim 1, wherein the compensated drive circuit includes divider circuitry for stepping down the frequency of the compensated clock signal to a selectable frequency for generating a counter output signal.
15. The system of Claim 14, wherein the compensated drive circuit further includes flip-flop circuitry for splitting the counter output signal into first and second complementary square waves together forming a driver input signal.
16. The system of Claim 15, wherein the respective first and second complementary square waves of the driver input signal have a frequency that is substantially one-half of the frequency of the counter output signal.
17. The system of Claim 15, wherein a sample of one of at least one of the first and second complementary square waves is the divider reference signal.
18. The system of Claim 15, wherein the compensated drive circuit further includes a driver for amplifying the driver input signal for generating the driver output signal, wherein the driver output signal includes first and second complementary signals.
19. The system of Claim 18, wherein the amplifier includes first and second switching elements receiving the driver output signal, and the first and second complementary signals of the driver output signal are coupled to the first and second switching elements, respectively.
20. The system of Claim 19, wherein the driver includes a phase delay circuit for selectively adjusting at least one of the phase relationship between the first and second complementary signals of the driver output signal and pulse width of pulses of at least one of the first and second complementary signals of the driver output signal.
21. The system of Claim 20, wherein the adjusting by the phase delay circuit provides for controlling the output of the ultrasonic device for producing a pulsed output from the ultrasonic device.
22. A system for controlling an output of an ultrasonic device, the system comprising:
a switched resonant power amplifier receiving and processing a driver output signal for generating a drive signal that is provided to an ultrasonic device for controlling the output of the ultrasonic device;
an output control circuit comprising:
a wave shaping circuit comprising;
a zero crossing detector receiving and processing a feedback signal related to the output of the ultrasonic device and generated by the ultrasonic device, the zero crossing detector generating a corresponding square wave signal; and a comparator comparing the square wave signal to a reference signal for generating a reset signal having a substantially identical frequency to the feedback signal;
a compensating circuit comprising:
a reference timer for receiving and processing the reset signal for generating a compensated reference signal having substantially the same frequency as the reset signal and substantially 180° out-of-phase with respect to the reset signal, wherein frequency and amplitude characteristics of the compensated reference signal are determined at least by the reset signal; and a phase locked loop (PLL) receiving first and second input signals, wherein the first input signal is the compensated reference signal and the second input signal is a divider reference signal, and wherein the PLL processes the first and second input signals for generating a compensated clock signal that is adjusted for at least one of phase and frequency differences between the received first and second input signals;
and a compensated drive circuit operatively coupled to the compensating circuit, the compensated drive circuit comprising:
divider circuitry for stepping down the frequency of the compensated clock signal to a selectable frequency for generating a counter output signal;
flip-flop circuitry for splitting the counter output signal into first and second complementary square waves together forming a driver input signal, wherein a sample of at least one of the first and second complementary square waves is the divider reference signal; and a driver for amplifying the driver input signal for generating the driver output signal.
a switched resonant power amplifier receiving and processing a driver output signal for generating a drive signal that is provided to an ultrasonic device for controlling the output of the ultrasonic device;
an output control circuit comprising:
a wave shaping circuit comprising;
a zero crossing detector receiving and processing a feedback signal related to the output of the ultrasonic device and generated by the ultrasonic device, the zero crossing detector generating a corresponding square wave signal; and a comparator comparing the square wave signal to a reference signal for generating a reset signal having a substantially identical frequency to the feedback signal;
a compensating circuit comprising:
a reference timer for receiving and processing the reset signal for generating a compensated reference signal having substantially the same frequency as the reset signal and substantially 180° out-of-phase with respect to the reset signal, wherein frequency and amplitude characteristics of the compensated reference signal are determined at least by the reset signal; and a phase locked loop (PLL) receiving first and second input signals, wherein the first input signal is the compensated reference signal and the second input signal is a divider reference signal, and wherein the PLL processes the first and second input signals for generating a compensated clock signal that is adjusted for at least one of phase and frequency differences between the received first and second input signals;
and a compensated drive circuit operatively coupled to the compensating circuit, the compensated drive circuit comprising:
divider circuitry for stepping down the frequency of the compensated clock signal to a selectable frequency for generating a counter output signal;
flip-flop circuitry for splitting the counter output signal into first and second complementary square waves together forming a driver input signal, wherein a sample of at least one of the first and second complementary square waves is the divider reference signal; and a driver for amplifying the driver input signal for generating the driver output signal.
23. A system for controlling an output of an ultrasonic device, the system comprising:
an amplifier receiving and processing a driver output signet for generating a drive signal that is provided to an ultrasonic device for controlling output of the ultrasonic device;
an output control circuit receiving and processing a signal related to a feedback signal generated by the ultrasonic device and a divider reference signal for generating a compensated clock signal that is adjusted for at least one of phase and frequency differences between the received feedback signal and the divider reference signal; and a compensated drive circuit comprising:
divider circuitry for stepping down the frequency of the compensated clock signal to a selectable frequency for generating a counter output signal;
flip-flop circuitry for splitting the counter output signal into first and second complementary square waves together forming a driver input signal, wherein a sample of at least one of the first and second complementary square waves is the divider reference signal; and a driver for amplifying the driver input signal for generating the driver output signal;
wherein the driver comprises a phase delay circuit for selectively adjusting at least one of the phase relationship between the first and second complementary signals of the driver output signal and pulse width of pulses of at least one of the first and second complementary signals of the driver output signal.
an amplifier receiving and processing a driver output signet for generating a drive signal that is provided to an ultrasonic device for controlling output of the ultrasonic device;
an output control circuit receiving and processing a signal related to a feedback signal generated by the ultrasonic device and a divider reference signal for generating a compensated clock signal that is adjusted for at least one of phase and frequency differences between the received feedback signal and the divider reference signal; and a compensated drive circuit comprising:
divider circuitry for stepping down the frequency of the compensated clock signal to a selectable frequency for generating a counter output signal;
flip-flop circuitry for splitting the counter output signal into first and second complementary square waves together forming a driver input signal, wherein a sample of at least one of the first and second complementary square waves is the divider reference signal; and a driver for amplifying the driver input signal for generating the driver output signal;
wherein the driver comprises a phase delay circuit for selectively adjusting at least one of the phase relationship between the first and second complementary signals of the driver output signal and pulse width of pulses of at least one of the first and second complementary signals of the driver output signal.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2729742A CA2729742C (en) | 2003-10-30 | 2004-10-28 | Switched resonant ultrasonic power amplifier system |
CA2729743A CA2729743C (en) | 2003-10-30 | 2004-10-28 | Switched resonant ultrasonic power amplifier system |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US51582603P | 2003-10-30 | 2003-10-30 | |
US60/515,826 | 2003-10-30 | ||
US52781203P | 2003-12-08 | 2003-12-08 | |
US60/527,812 | 2003-12-08 | ||
US53820204P | 2004-01-22 | 2004-01-22 | |
US60/538,202 | 2004-01-22 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA2729743A Division CA2729743C (en) | 2003-10-30 | 2004-10-28 | Switched resonant ultrasonic power amplifier system |
CA2729742A Division CA2729742C (en) | 2003-10-30 | 2004-10-28 | Switched resonant ultrasonic power amplifier system |
Publications (2)
Publication Number | Publication Date |
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CA2486240A1 true CA2486240A1 (en) | 2005-04-30 |
CA2486240C CA2486240C (en) | 2012-02-07 |
Family
ID=34437676
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA2486240A Expired - Fee Related CA2486240C (en) | 2003-10-30 | 2004-10-28 | Switched resonant ultrasonic power amplifier system |
CA2729742A Expired - Fee Related CA2729742C (en) | 2003-10-30 | 2004-10-28 | Switched resonant ultrasonic power amplifier system |
CA2729743A Expired - Fee Related CA2729743C (en) | 2003-10-30 | 2004-10-28 | Switched resonant ultrasonic power amplifier system |
Family Applications After (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA2729742A Expired - Fee Related CA2729742C (en) | 2003-10-30 | 2004-10-28 | Switched resonant ultrasonic power amplifier system |
CA2729743A Expired - Fee Related CA2729743C (en) | 2003-10-30 | 2004-10-28 | Switched resonant ultrasonic power amplifier system |
Country Status (5)
Country | Link |
---|---|
US (6) | US7396336B2 (en) |
EP (1) | EP1529570B1 (en) |
JP (1) | JP4700330B2 (en) |
AU (2) | AU2004224955B2 (en) |
CA (3) | CA2486240C (en) |
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-
2004
- 2004-10-27 US US10/974,332 patent/US7396336B2/en active Active
- 2004-10-28 CA CA2486240A patent/CA2486240C/en not_active Expired - Fee Related
- 2004-10-28 CA CA2729742A patent/CA2729742C/en not_active Expired - Fee Related
- 2004-10-28 CA CA2729743A patent/CA2729743C/en not_active Expired - Fee Related
- 2004-10-29 AU AU2004224955A patent/AU2004224955B2/en not_active Ceased
- 2004-10-29 EP EP04025791.7A patent/EP1529570B1/en not_active Not-in-force
- 2004-11-01 JP JP2004347583A patent/JP4700330B2/en not_active Expired - Fee Related
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2008
- 2008-06-27 US US12/163,408 patent/US8096961B2/en not_active Expired - Fee Related
- 2008-06-27 US US12/163,341 patent/US8113057B2/en not_active Expired - Fee Related
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2010
- 2010-11-16 AU AU2010241448A patent/AU2010241448B2/en not_active Ceased
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2012
- 2012-01-16 US US13/350,877 patent/US8485993B2/en not_active Expired - Fee Related
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2013
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2015
- 2015-01-23 US US14/604,452 patent/US9768373B2/en active Active
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AU2010241448A1 (en) | 2010-12-02 |
AU2010241448B2 (en) | 2011-11-17 |
US20140163431A1 (en) | 2014-06-12 |
CA2729743C (en) | 2014-09-23 |
US20080287838A1 (en) | 2008-11-20 |
JP2005137016A (en) | 2005-05-26 |
US20120116268A1 (en) | 2012-05-10 |
US9768373B2 (en) | 2017-09-19 |
US8966981B2 (en) | 2015-03-03 |
CA2486240C (en) | 2012-02-07 |
CA2729742C (en) | 2013-02-05 |
AU2004224955A1 (en) | 2005-05-19 |
AU2004224955B2 (en) | 2010-12-23 |
US20080287791A1 (en) | 2008-11-20 |
US20050149151A1 (en) | 2005-07-07 |
US20150130374A1 (en) | 2015-05-14 |
US7396336B2 (en) | 2008-07-08 |
US8113057B2 (en) | 2012-02-14 |
EP1529570A9 (en) | 2015-04-01 |
CA2729743A1 (en) | 2005-04-30 |
JP4700330B2 (en) | 2011-06-15 |
EP1529570A2 (en) | 2005-05-11 |
EP1529570B1 (en) | 2016-07-27 |
US8096961B2 (en) | 2012-01-17 |
EP1529570A3 (en) | 2015-03-25 |
CA2729742A1 (en) | 2005-04-30 |
US8485993B2 (en) | 2013-07-16 |
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