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Publication numberUS3838564 A
Publication typeGrant
Publication dateOct 1, 1974
Filing dateJun 19, 1972
Priority dateJun 19, 1972
Also published asCA975063A, CA975063A1, CA990349A, CA990349A1, CA999356A, CA999356A1, CA1006588A, CA1006588A1, CA1006914A, CA1006914A1, CA1010971A, CA1010971A1, CA1011431A, CA1011431A1, CA1013030A, CA1013030A1, DE2326899A1, US3783308, US3809994, US3828548, US3886726, US3893017, US4080780
Publication numberUS 3838564 A, US 3838564A, US-A-3838564, US3838564 A, US3838564A
InventorsS Holcomb
Original AssigneeTexas Instruments Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Oscillator
US 3838564 A
Abstract
An electronic timekeeping device includes bipolar integrated circuit implemented logic in combination with a liquid crystal display. A crystal controlled oscillator provides the system clock signal for controlling the logic of the electronic timekeeping device. The oscillator operates from a low voltage power source and provides a wide frequency tuning range.
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Description  (OCR text may contain errors)

United States Patent 9] in] 3,838,564 Holcomb Oct. 1, 1974 [5 OSCILLATOR 3,530,662 9 1970 Schoninger 58/23 R Inventor: Smnley w- Holcomb, Richardson 3,534,544 l0/l970 Oguey et al 58/23 A Tex. Primary Examiner-Edith Simmons Jackmon [73] Asslgnee g hjrstruments Incorporated Attorney, Agent, or Firml-larold Levine; Edward J. a Connors, Jr.; Stephen S. Sadacca [22] Filed: June 19, 1972 [21] Appl. No.: 263,919 ABSTRACT [52] U.S. Cl. 58/23 AC, 58/4 A, 58/5 1), An electronic timekeeping device includes bipolar in- 331/ 185 tegrated circuit implemented logic in combination [51] Int. CL... G04b 19/24, 604 3/()(), G04]; 19/30 with a liquid crystal display. A crystal controlled oscil- [58] Field of Search, 58/4 A, 23 R, 23 A, 23 AC, lator provides the system clock signal for controlling 58/23 BA, 50 R; 307/297; 331/185, 186 the logic of the electronic timekeeping device. The oscillator operates from a low voltage power source and [56] R f r Cit d provides a wide frequency tuning range.

UNITED STATES PATENTS 4 Claims, 48 Drawing Figures 3,518,458 6/1970 Camenzind 307/297 SUPPLY CURRENT REGULATOR FIG. 25 l6 5 l SEC. RESET 1 osc. EL S COUNTER 1- RESET FIGS. 6- FIG-5 6 9 HoURREsET 1-DATE RESET 30 CLOCK SYSTEM U 22 DECODE FIGS. 6-9

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' I DRIVER DISPLAY FIGS. 6-9 FI 3 P .DC/DC S 28 SUPPLY CONVERTER FIG. 32

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Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3518458 *Jun 23, 1967Jun 30, 1970Mallory & Co Inc P RDecoupling means for integrated circuit
US3530662 *Apr 1, 1968Sep 29, 1970Siemens AgElectrically controlled timekeeper devices with mechanical oscillators
US3534544 *Dec 26, 1967Oct 20, 1970Centre Electron HorlogerElectronic watch
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3937049 *Mar 6, 1974Feb 10, 1976Citizen Watch Co., Ltd.Monitoring system for digital electronic timepiece
US3946591 *Jan 3, 1974Mar 30, 1976Citizen Watch Co., Ltd.Method of and system for detecting the rate of an electronic timepiece
US5604466 *Nov 28, 1994Feb 18, 1997International Business Machines CorporationOn-chip voltage controlled oscillator
US6700450 *Nov 13, 2002Mar 2, 2004Cognio, Inc.Voltage-controlled oscillator with an automatic amplitude control circuit
US20040017268 *Nov 13, 2002Jan 29, 2004Cognio, Inc.Voltage-controlled oscillator with an automatic amplitude control circuit
Classifications
U.S. Classification368/157, 968/933, 968/888, 968/503, 331/116.00R, 968/914, 968/878, 968/498, 331/185, 968/876, 968/965, 368/242
International ClassificationG04G99/00, G04G19/00, G04G17/02, H03K3/012, G04G5/04, G04G9/00, G04G9/12, G04C10/00, H03K3/289, H01L27/00, G04C9/00
Cooperative ClassificationG04G5/04, H03K3/012, G04C10/00, H03K3/289, G04G99/00, H01L27/00, G04G19/00, G04G9/0047, G04C9/00, G04G17/02, G04G9/126
European ClassificationH01L27/00, H03K3/012, G04G19/00, H03K3/289, G04G9/12D, G04G5/04, G04G17/02, G04G9/00D1C, G04C9/00, G04C10/00, G04G99/00