WO2001008298A1 - Amplifier having bias circuit self-compensating for vgs process variation and ids aging - Google Patents
Amplifier having bias circuit self-compensating for vgs process variation and ids aging Download PDFInfo
- Publication number
- WO2001008298A1 WO2001008298A1 PCT/US2000/019463 US0019463W WO0108298A1 WO 2001008298 A1 WO2001008298 A1 WO 2001008298A1 US 0019463 W US0019463 W US 0019463W WO 0108298 A1 WO0108298 A1 WO 0108298A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- transistor
- power
- power transistor
- ldmos
- sense
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
- H03F1/307—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters in push-pull amplifiers
- H03F1/308—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters in push-pull amplifiers using MOSFET
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
- H03F1/301—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters in MOSFET amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/56—Modifications of input or output impedances, not otherwise provided for
Definitions
- MOS power devices in AC-coupled amplifiers The invention is particularly concerned
- the Motorola MRF21120 is rated to produce 120 watts in the same frequency
- LDMOS RF power devices are typically N-channel enhancement mode
- the output terminal and the drain and providing a path for power to the drain.
- RF amplifiers using these LDMOS devices typically also have a gate
- bias circuit that provides a DC component, or gate bias, to the gate voltage of
- this gate bias voltage is
- LDMOS RF power devices have gate threshold voltages that are
- the Motorola MRF282SR1 is specified to have a gate threshold
- the MRF282SR1 requires a bias voltage of
- MRF282SR1 please see the data sheet MRF282/D available from Motorola's
- Prior-art biasing circuits use a resistive voltage divider, implemented as
- This adjustment step sets the ratio of
- resistor ratio should ideally be set separately for each device of the pair so
- extra quiescent current may be carried to ensure linear
- LDMOS RF power transistors are made as a plurality of smaller
- Each cell has a source, a gate, and a drain.
- N/M differing by a known ratio N/M, are commonly built by paralleling N cells for
- This bias voltage may be applied to an LDMOS RF power
- An LDMOS RF amplifier having a bias voltage generated through
- sensing circuit that monitors current in the sense transistor, and a bias voltage
- bias voltage from the bias voltage generation circuit is applied to the gates of
- AC-coupled RF input signal is applied through typical impedance-matching
- output signal is tapped from, and power applied to, the drain of the RF power
- Figure 1 is a schematic of a prior art class AB amplifier using an
- Figure 2 a conceptual schematic of an amplifier having a sense-
- Figure 3 a schematic of a Class AB amplifier having a sense-transistor
- Figure 4 a schematic of a Class A amplifier having an alternative embodiment of a sense-transistor controlled bias circuit.
- Figure 1 shows an LDMOS Class-AB RF amplifier of typical prior art
- This amplifier has a bias circuit similar to that proposed in Motorola
- isolation circuit 101 are known in the art. At low frequencies torroidal
- transformers may be used. At higher frequencies microstripline circuitry is
- This circuit may include resonant circuits if narrow-band operation
- the input impedance matching, phase shifting, and DC-isolation circuit The input impedance matching, phase shifting, and DC-isolation circuit
- An output impedance matching and isolation circuit 104 couples power
- torroidal transformers may be used. At higher frequencies, such as 1.8 GHz
- microstripline circuitry is common. This circuit may include tuned resonant circuits if narrow-band operation is
- Gate bias circuits 1 10 and 1 1 1 provide a DC bias voltage to the gates of
- temperature-compensation diode 1 12 provides a temperature-dependent
- terminal voltage regulator thereupon provides a temperature-dependent supply
- Potentiometer 115 provides a gate bias
- Potentiometer 115 is adjusted so that the gate bias voltage produces
- amplifier transistors may replace the potentiometer; such a resistor pair may
- Figure 2 shows an amplifier having a sense-transistor controlled bias
- a sense transistor, 200 is
- Power is supplied from the power terminal of the amplifier 201 to
- At least one of the sense transistor 200 through a current monitoring circuit 202. At least one
- isolation network 214 also extracts an AC signal from the drain of the RF
- Figure 3 is a schematic of a Class-AB linear RF power amplifier
- This amplifier has an input terminal 301
- transistor 303 and an AC component one hundred eighty degrees out of phase
- each LDMOS power transistor is fabricated as a
- Each LDMOS sense transistor preferably forms a ratioed matched pair with its
- LDMOS power transistor 303 is therefore fabricated with
- LDMOS sense transistor 305 as a ratioed matched pair 306.
- LDMOS power transistor 304 is therefore fabricated with LDMOS sense
- transistor 307 as a ratioed matched pair 308.
- a sensing circuit provides power to and monitors current flow through
- sensing circuit comprises load resistors 310 and 31 1. A signal from the
- sensing circuit is fed to a feedback-controlled bias circuit such that the current
- pair 306 comprises an operational amplifier 314 and resistors 315, 316, 317,
- the bias voltage from the feedback-controlled bias circuit is coupled
- the LDMOS power transistor 303 forms a ratioed matched pair
- the LDMOS power transistor as is to the LDMOS sense transistor
- LDMOS power transistor 304 draws a fairly constant quiescent current approximately equal to the ratio of the device sizes times the current in the
- RF power transistor 352 is connected to the gate of an LDMOS RF power transistor 352.
- a source of DC power 355 is coupled through an output impedance matching,
- current sensing circuit incorporates a current mirror 360 containing a matched
- current mirror may contain a pair of PMOS transistors in place of the PNP
- the current in resistor 363 produces a voltage that is compared
- the bias generated by the operational amplifier 365 is
- a class AB amplifier according to the present invention may also be
- a bias voltage generated by a current monitoring circuit that
- bias circuit is applied to the gates of both RF power transistors and the sense
- the bias generation circuitry of the present invention may also be any circuitry.
- VMOS vertical
- Bias circuits of the present invention may also be applied to Class B
- this invention to circuitry that monitors current through the drain.
- power amplifier transistor and the sense transistor may range from 1 : 1 for low
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU61067/00A AU6106700A (en) | 1999-07-23 | 2000-07-14 | Amplifier having bias circuit self-compensating for vgs process variation and ids aging |
EP00947464A EP1205025A1 (en) | 1999-07-23 | 2000-07-14 | Amplifier having bias circuit self-compensating for vgs process variation and ids aging |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/361,036 | 1999-07-23 | ||
US09/361,036 US6111464A (en) | 1999-07-23 | 1999-07-23 | Amplifier having bias circuit self-compensating for VGS process variation and IDS aging |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001008298A1 true WO2001008298A1 (en) | 2001-02-01 |
Family
ID=23420397
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2000/019463 WO2001008298A1 (en) | 1999-07-23 | 2000-07-14 | Amplifier having bias circuit self-compensating for vgs process variation and ids aging |
Country Status (4)
Country | Link |
---|---|
US (1) | US6111464A (en) |
EP (1) | EP1205025A1 (en) |
AU (1) | AU6106700A (en) |
WO (1) | WO2001008298A1 (en) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI108686B (en) * | 1999-12-30 | 2002-02-28 | Nokia Corp | Control of bias voltage |
US7078967B2 (en) | 1999-12-30 | 2006-07-18 | Nokia Corporation | Control of bias voltage |
US20030054780A1 (en) * | 2000-09-05 | 2003-03-20 | Hitachi, Ltd. | High frequency power amplifying circuit, and mobile communication apparatus using it |
FR2834088B1 (en) * | 2001-12-20 | 2004-03-19 | St Microelectronics Sa | METHOD AND DEVICE FOR POLARIZING A TRANSISTOR OF A RADIO FREQUENCY AMPLIFIER STAGE |
US20040070454A1 (en) * | 2002-10-15 | 2004-04-15 | Triquint Semiconductor, Inc. | Continuous bias circuit and method for an amplifier |
GB2406728B (en) * | 2003-10-01 | 2007-06-13 | Zarlink Semiconductor Ltd | An integrated circuit device |
GB2408401B (en) * | 2003-11-24 | 2006-05-03 | Zarlink Semiconductor Ltd | A network |
GB2408400B (en) * | 2003-11-24 | 2006-05-03 | Zarlink Semiconductor Ltd | A circuit arrangement |
US7990223B1 (en) * | 2010-05-31 | 2011-08-02 | Kabushiki Kaisha Toshiba | High frequency module and operating method of the same |
US8816775B2 (en) * | 2012-09-13 | 2014-08-26 | Freescale Semiconductor, Inc. | Quiescent current determination using in-package voltage measurements |
CN103219955B (en) * | 2013-04-08 | 2016-09-07 | 京信通信技术(广州)有限公司 | The aging method of radio-frequency power amplifier and device |
FR3059493B1 (en) * | 2016-11-29 | 2019-11-22 | Stmicroelectronics Sa | REGULATING AN RF AMPLIFIER |
US10523260B2 (en) * | 2017-12-22 | 2019-12-31 | Commscope Technologies Llc | Base station antennas having transmitters and receivers therein that support time division duplexing (TDD) with enhanced bias control for high speed switching |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0314221A2 (en) * | 1987-10-30 | 1989-05-03 | Koninklijke Philips Electronics N.V. | Semiconductor switch with parallel LDMOS and LIGT |
WO1994023491A1 (en) * | 1993-03-26 | 1994-10-13 | Qualcomm Incorporated | Power amplifier bias control circuit and method |
US5365194A (en) * | 1993-06-03 | 1994-11-15 | Apex Microtechnology Corporation | Power operational amplifier having oscillation limiter and method therefor |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8813349D0 (en) * | 1988-06-06 | 1988-07-13 | Gen Electric Co Plc | Amplifiers |
US5055796A (en) * | 1990-05-25 | 1991-10-08 | Maxim Integrated Products | CMOS output stage |
US5973564A (en) * | 1998-04-02 | 1999-10-26 | Burr-Brown Corporation | Operational amplifier push-pull output stage with low quiescent current |
-
1999
- 1999-07-23 US US09/361,036 patent/US6111464A/en not_active Expired - Lifetime
-
2000
- 2000-07-14 EP EP00947464A patent/EP1205025A1/en not_active Withdrawn
- 2000-07-14 AU AU61067/00A patent/AU6106700A/en not_active Abandoned
- 2000-07-14 WO PCT/US2000/019463 patent/WO2001008298A1/en not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0314221A2 (en) * | 1987-10-30 | 1989-05-03 | Koninklijke Philips Electronics N.V. | Semiconductor switch with parallel LDMOS and LIGT |
WO1994023491A1 (en) * | 1993-03-26 | 1994-10-13 | Qualcomm Incorporated | Power amplifier bias control circuit and method |
US5365194A (en) * | 1993-06-03 | 1994-11-15 | Apex Microtechnology Corporation | Power operational amplifier having oscillation limiter and method therefor |
Non-Patent Citations (1)
Title |
---|
HUIJSING J H ET AL: "LOW-POWER LOW-VOLTAGE VLSI OPERATIONAL AMPLIFIER CELLS", IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I: FUNDAMENTAL THEORY AND APPLICATIONS,US,IEEE INC. NEW YORK, vol. 42, no. 11, 1 November 1995 (1995-11-01), pages 841 - 852, XP000549472, ISSN: 1057-7122 * |
Also Published As
Publication number | Publication date |
---|---|
US6111464A (en) | 2000-08-29 |
EP1205025A1 (en) | 2002-05-15 |
AU6106700A (en) | 2001-02-13 |
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