GR 1657 RLC Digibridge

Background

I'm been curious about these for some time, but prior to now they were too pricey.  This is related to my interest in impedance, RLC Bridges and LCR meters.

Description

Photos

Fig 1	Fig 2

Patents

3562641 Impedance-measuring transformer bridge with automatic digital balancing circuit, Robert G Fulks, General Radio Co, 1971-02-09,

Citations:

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Publication number  Priority date  Publication date  Assignee  Title

US3718856A *1970-12-02  1973-02-27  Teradyne Inc  Inductance and capacitance reactance measuring instrument having minimal inclusion of stray reactances

FR2184442A1 *1972-05-17  1973-12-28  Snecma

US4001813A *1975-07-02  1977-01-04  The Bendix Corporation  Precision capacitance to digital conversion system

DE2715842A1 *1976-09-02  1978-03-09  Genrad Inc  A method for automatic impedance measurement

US4342089A *1976-09-02  1982-07-27  Genrad, Inc.  Method of and apparatus for automatic measurement of circuit parameters with microprocessor calculation techniques

WO1987002142A1 *1985-10-01  1987-04-09  Andeen-Hagerling, Inc.  High precision capacitance bridge

US4841228A *1986-07-11  1989-06-20  Hewlett-Packard Company  Apparatus for indicating the resistive characteristic of a capacitor

US4982351A *1986-05-05  1991-01-01  Texas Instruments Incorporated  Low cost high precision sensor

US5051937A *1986-05-05  1991-09-24  Texas Instruments Incorporated  Low cost high precision sensor

US5287065A *1991-10-04  1994-02-15  Doble Engineering Company  Automatic bridge balancing using controllable impedance in characterizing unknown impedance

US6204673B11998-12-01  2001-03-20  Andeen-Hagerling, Inc.  Method and apparatus using feedback to correct the production of magnitude and phase relationships between two sinusoidal signals for use in a ratio-transformer capacitance bridge

US20140375374A1 *2013-06-24  2014-12-25  Silicon Laboratories Inc.  Capacitance to Digital Converter and Method

4181949 Method of and apparatus for phase-sensitive detection, Henry P. Hall, GenRad Inc, 1980-01-01 - half wave long samples at 0, 405 and 810 degrees.

4196475 Method of and apparatus for automatic measurement of impedance or other parameters with microprocessor calculation techniques, Henry P. Hall, GenRad Inc, 1980-04-01 - GR 1657

Citations:

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US5515291A *1991-08-23  1996-05-07  Mitsubishi Denki Kabushiki Kaisha  Apparatus for calculating delay time in logic functional blocks

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US6502046B1 *1999-03-13  2002-12-31  Korea Kumbo Petrochemical Co. Ltd  Laplace transform impedance spectrometer and its measurement method

US20040078156A1 *2002-10-21  2004-04-22  Isaac Kantorovich  System and method of measuring low impedances

US20050021254A1 *2003-07-25  2005-01-27  James G. Biddle Co.  Method and apparatus for determining the complex impedance of an electrical component

US20080030386A1 *2006-08-03  2008-02-07  Kabushiki Kaisha Toshiba  Integrated circuit, self-test method for the integrated circuit, and optical disc apparatus including the integrated circuit

US20100148795A1 *2008-12-16  2010-06-17  Primarion Inc.  Methods and apparatus for selecting settings for circuits

US20120109558A1 *2009-06-25  2012-05-03  Zte Corporation  Method for Implementing Electromagnetic Anti-Interference Filter Impedance Match and Measuring System Thereof

CN102608425A *2012-03-26  2012-07-25  中国科学院物理研究所  Broadband impedance measuring system and broadband impedance measuring method

CN103792430A *2012-10-26  2014-05-14  无锡华润上华科技有限公司  Self-adaptive range resistance test method

KR101491102B1 *2012-12-20  2015-02-06  포스코에너지 주식회사  Characteristic measurement apparatus for secondary battery and method thereof

WO2018127793A1 *2017-01-09  2018-07-12  Analog Devices Global Unlimited Company  Devices and methods for smart sensor application

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US5073757A *1988-09-23  1991-12-17  John Fluke Mfg. Co., Inc.  Apparatus for and method of measuring capacitance of a capacitive element

FR2637985B1 *1988-10-14  1991-04-26  Collet Gerard  Method and apparatus for measuring resistive impedances, particularly for measuring temperature

JPH02110797U *1989-02-22  1990-09-05

CN103837727B *2012-11-27  2016-05-25承永资讯科技股份有限公司  Automatic balancing bridge gear selection method and apparatus

4242631 Front-end circuit apparatus for impedance measurements and the like,  Henry P. Hall, GenRad Inc, 1980-12-30 - GR1657-RLC "Digibridge"

Citations:

Publication number  Priority date  Publication date  Assignee  Title

US2479051A *1945-04-12  1949-08-16  Philco Corp  Alternating current type limit bridge

US2589758A *1948-07-22  1952-03-18  Western Electric Co  Method and apparatus for making electrical measurements

US2593175A *1947-07-08  1952-04-15  Technology Instr Corp  Electric method and system for measuring impedance magnitude and phase angle

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US3031614A *1958-01-10  1962-04-24  Wayne Kerr Lab Ltd  Electrical measuring bridges

US3422347A *1964-10-06  1969-01-14  Canadian Patents Dev  Comparator circuit having a hall generator for measurement of d.c. magnetic fields

US3585496A *1968-01-05  1971-06-15  Tsugami Mfg Co Ltd  Dielectric loss measuring apparatus employing plural tuned circuits

US3718856A *1970-12-02  1973-02-27  Teradyne Inc  Inductance and capacitance reactance measuring instrument having minimal inclusion of stray reactances

US3784906A *1971-11-01  1974-01-08  Biddle Co J  Bridge having multiple nulls

US3786350A *1972-08-21  1974-01-15  Weston Instruments Inc  Linear input ohmmeter

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US4546441A *1982-07-22  1985-10-08  John Burch  Method and apparatus for time based measurement of impedance

US4808914A *1985-10-17  1989-02-28  Harris Corporation  Resistance measuring ohms converter circuit employing a constant current source

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US5030919A *1990-06-04  1991-07-09  G&E Test Technologies, Inc.Z  ero impedance switch

US5278512A *1992-05-15  1994-01-11  Richard Goldstein  Apparatus and method for continuously monitoring grounding conductor resistance in power distribution systems

US6198295B11999-01-06  2001-03-06  Honeywell Inc.  Apparatus and method for detecting electrical resistance change in connectors to a remote mounted sensor

US6259259B11998-04-21  2001-07-10  Vega Grieshaber Kg  Method and apparatus for automatically adjusting the measurement range of admittance level sensors

US6486679B1 *2002-01-21  2002-11-26  Kenneth David Holt  Wide-band ratiometric radio frequency bridge

US6722282B21999-12-17  2004-04-20  Schott Glas  Ignition capsule, which can be inductively activated, for occupant restraint systems, and a test circuit for said ignition capsule

US20040189330A1 *2003-01-09  2004-09-30  Ulrich Herb  Circuit and method for detecting insulation faults

US20080007270A1 *2006-07-05  2008-01-10  Hon Hai Precision Industry Co., Ltd.  Solenoid test device

US20080043992A1 *2006-07-25  2008-02-21  Gigle Semiconductor Inc.  Feedback impedance control for driving a signal

US20110291672A1 *2009-02-02  2011-12-01  Huettinger Simon  Galvanically isolated functional test for components

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DE102016112201A12016-07-0  42018-01-04  Endress+Hauser Conducta Gmbh+Co. Kg  Method for fault detection of an electrical circuit and electrical circuit

Related

General Radio GR 650-A & GR 1650B Impedance Bridges
HP4260 Universal Bridge
HP 4261A LCR Meter
HP 4274A & HP 4275A LCR Meters
HP 4332 LCR Meter
HP 4395A Combination Network, Spectrum, Impedance Analyzer
Marconi TF-2700 Universal Bridge
Q-meters
SR715 LCR Meter
Impedance
ZM-11/U Capactance-Inductance-Resistance Bridge, line powered
ZM4 Bridge battery powered
Crystal Impedance Meters

References

GenRad 1657 RLC Digibridge -

Links

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Page Created 2019 October 15