CA2087522C - Temperature-independent linear-to-exponential converter - Google Patents

Temperature-independent linear-to-exponential converter

Info

Publication number
CA2087522C
CA2087522C CA002087522A CA2087522A CA2087522C CA 2087522 C CA2087522 C CA 2087522C CA 002087522 A CA002087522 A CA 002087522A CA 2087522 A CA2087522 A CA 2087522A CA 2087522 C CA2087522 C CA 2087522C
Authority
CA
Canada
Prior art keywords
signal
temperature
current
bipolar junction
circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CA002087522A
Other languages
English (en)
French (fr)
Inventor
Daniel Charles Feldt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Motorola Solutions Inc
Original Assignee
Motorola Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Motorola Inc filed Critical Motorola Inc
Application granted granted Critical
Publication of CA2087522C publication Critical patent/CA2087522C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06G—ANALOGUE COMPUTERS
    • G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
    • G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers
    • G06G7/24—Arrangements for performing computing operations, e.g. operational amplifiers for evaluating logarithmic or exponential functions, e.g. hyperbolic functions

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Software Systems (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Amplifiers (AREA)
CA002087522A 1991-06-03 1992-05-08 Temperature-independent linear-to-exponential converter Expired - Fee Related CA2087522C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/709,739 US5200655A (en) 1991-06-03 1991-06-03 Temperature-independent exponential converter
US709,739 1991-06-03

Publications (1)

Publication Number Publication Date
CA2087522C true CA2087522C (en) 1996-10-08

Family

ID=24851140

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002087522A Expired - Fee Related CA2087522C (en) 1991-06-03 1992-05-08 Temperature-independent linear-to-exponential converter

Country Status (6)

Country Link
US (1) US5200655A (US07345094-20080318-C00047.png)
JP (1) JP3253616B2 (US07345094-20080318-C00047.png)
CA (1) CA2087522C (US07345094-20080318-C00047.png)
DE (2) DE4291894C2 (US07345094-20080318-C00047.png)
GB (1) GB2261756B (US07345094-20080318-C00047.png)
WO (1) WO1992022877A1 (US07345094-20080318-C00047.png)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4124585A1 (de) * 1991-07-24 1993-01-28 Siemens Ag Steuerbare schaltungsanordnung
MY112702A (en) * 1992-10-30 2001-08-30 Sony Corp Reproducing circuit for a magnetic head.
EP0613243A1 (en) * 1993-02-26 1994-08-31 STMicroelectronics S.r.l. Anti-logarithmic converter with temperature compensation
GB2280073B (en) * 1993-06-30 1996-11-27 Northern Telecom Ltd Amplifier circuit
JP2694767B2 (ja) * 1993-10-29 1997-12-24 東光株式会社 積分器
US5481218A (en) * 1994-09-30 1996-01-02 Telefonaktiebolaget Lm Ericsson Logarithmic converter
US5777509A (en) * 1996-06-25 1998-07-07 Symbios Logic Inc. Apparatus and method for generating a current with a positive temperature coefficient
US6259302B1 (en) * 1998-10-22 2001-07-10 National Semiconductor Corporation Gain control signal generator that tracks operating variations due to variations in manufacturing processes and operating conditions by tracking variations in DC biasing
US6369618B1 (en) * 1999-02-12 2002-04-09 Texas Instruments Incorporated Temperature and process independent exponential voltage-to-current converter circuit
EP1089430A3 (en) * 1999-09-30 2004-04-07 Agilent Technologies, Inc. (a Delaware corporation) A dB-linear variable gain amplifier
US6615027B1 (en) * 2000-01-21 2003-09-02 Qualcomm Incorporated Method and circuit for providing interface signals between integrated circuits
US6249170B1 (en) * 2000-04-14 2001-06-19 Motorola, Inc. Logarithmic gain control circuit and method
KR100609683B1 (ko) * 2003-12-26 2006-08-08 한국전자통신연구원 온도 보상이 가능한 ｃｍｏｓ지수함수 발생기 회로
US7710165B2 (en) * 2007-09-25 2010-05-04 Integrated Device Technology, Inc. Voltage-to-current converter
US8223900B2 (en) * 2009-03-02 2012-07-17 Maxim Integrated Products, Inc. Receiver with mixed-mode automatic gain control
US8400218B2 (en) 2010-11-15 2013-03-19 Qualcomm, Incorporated Current mode power amplifier providing harmonic distortion suppression
TWI509983B (zh) * 2011-02-01 2015-11-21 Wistron Neweb Corp 溫度補償裝置及衛星訊號接收系統

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3444362A (en) * 1964-10-30 1969-05-13 Teledyne Inc Antilogarithmic function generator
US3329836A (en) * 1965-06-02 1967-07-04 Nexus Res Lab Inc Temperature compensated logarithmic amplifier
US3612902A (en) * 1968-10-16 1971-10-12 Bell Telephone Labor Inc Temperature-independent antilogarithm circuit
US3790819A (en) * 1972-03-17 1974-02-05 Perkin Elmer Corp Log amplifier apparatus
JPS5161243A (en) * 1974-11-25 1976-05-27 Fuji Photo Optical Co Ltd Taisuzofukuki
JPS52139413A (en) * 1976-05-17 1977-11-21 Matsushita Electric Ind Co Ltd Sound source device for electronic instrument
US4333023A (en) * 1980-06-16 1982-06-01 Tektronix, Inc. Temperature-stabilized logarithmic converter
US4604532A (en) * 1983-01-03 1986-08-05 Analog Devices, Incorporated Temperature compensated logarithmic circuit
CA1203628A (en) * 1983-01-03 1986-04-22 Barrie Gilbert Temperature compensated logarithmic circuit
US4692025A (en) * 1984-05-30 1987-09-08 Sharp Kabushiki Kaisha Semiconductor color sensor detection circuit
US4786970A (en) * 1987-08-26 1988-11-22 Eastman Kodak Company Logarithmic amplifier
JPH0671185B2 (ja) * 1988-07-20 1994-09-07 三洋電機株式会社 対数増幅回路
US5126846A (en) * 1988-08-08 1992-06-30 Kabushiki Kaisha Toshiba Non-linear amplifier and non-linear emphasis/deemphasis circuit using the same
JPH0671186B2 (ja) * 1990-01-19 1994-09-07 株式会社東芝 対数増幅回路
US5065053A (en) * 1990-02-26 1991-11-12 Digital Equipment Corporation Of Canada, Ltd. Exponential function circuitry

Also Published As

Publication number Publication date
DE4291894T1 (US07345094-20080318-C00047.png) 1993-06-03
GB2261756B (en) 1995-05-17
GB9301644D0 (en) 1993-03-24
GB2261756A (en) 1993-05-26
JP3253616B2 (ja) 2002-02-04
WO1992022877A1 (en) 1992-12-23
DE4291894C2 (de) 1998-05-28
JPH06500879A (ja) 1994-01-27
US5200655A (en) 1993-04-06

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed