JPS5748826A - Circuit for converting input pulse duty ratio into analog voltage - Google Patents

Circuit for converting input pulse duty ratio into analog voltage

Info

Publication number
JPS5748826A
JPS5748826A JP12351480A JP12351480A JPS5748826A JP S5748826 A JPS5748826 A JP S5748826A JP 12351480 A JP12351480 A JP 12351480A JP 12351480 A JP12351480 A JP 12351480A JP S5748826 A JPS5748826 A JP S5748826A
Authority
JP
Japan
Prior art keywords
voltage
operational amplifier
circuit
integration
duty ratio
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.)
Pending
Application number
JP12351480A
Other languages
Japanese (ja)
Inventor
Naomi Tomizawa
Takaaki Shinagawa
Okimichi Okamoto
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.)
Hitachi Unisia Automotive Ltd
Nippon Denshi Kiki Co Ltd
Original Assignee
Japan Electronic Control Systems Co Ltd
Nippon Denshi Kiki Co Ltd
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 Japan Electronic Control Systems Co Ltd, Nippon Denshi Kiki Co Ltd filed Critical Japan Electronic Control Systems Co Ltd
Priority to JP12351480A priority Critical patent/JPS5748826A/en
Publication of JPS5748826A publication Critical patent/JPS5748826A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K9/00—Demodulating pulses which have been modulated with a continuously-variable signal
    • H03K9/08—Demodulating pulses which have been modulated with a continuously-variable signal of duration- or width-mudulated pulses or of duty-cycle modulated pulses

Landscapes

  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

PURPOSE:To make the pulse duty ratio stable and to cancel the conversion error, by constituting an operational amplifier as a voltage follower up to the start of integration and making the offset voltage equal to a prescribed value of reference voltage. CONSTITUTION:A prescribed reference voltage having the voltage dividing potential from a constant DC power supply determined by resistors R2, R3 is inputted to a noninverting input terminal + of an operational amplifier 5 in which an integrating capacitor C1 and a capacitor short-circuit switch S2 are connected in parallel between an inverting input terminal - and an output terminal and an input pulse (a) is inputted to the inverting input terminal - via an integrating time constant resistor R1. The integrating capacitor C1 is in short circuit with the switch S2 until the start of integration to constitute the operational amplifier 5 as a voltage follower, the offset voltage of the output of the operational amplifier 5 is made equal to the reference voltage to make the start point of integration constant.
JP12351480A 1980-09-08 1980-09-08 Circuit for converting input pulse duty ratio into analog voltage Pending JPS5748826A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12351480A JPS5748826A (en) 1980-09-08 1980-09-08 Circuit for converting input pulse duty ratio into analog voltage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12351480A JPS5748826A (en) 1980-09-08 1980-09-08 Circuit for converting input pulse duty ratio into analog voltage

Publications (1)

Publication Number Publication Date
JPS5748826A true JPS5748826A (en) 1982-03-20

Family

ID=14862488

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12351480A Pending JPS5748826A (en) 1980-09-08 1980-09-08 Circuit for converting input pulse duty ratio into analog voltage

Country Status (1)

Country Link
JP (1) JPS5748826A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2547935A1 (en) * 1983-06-27 1984-12-28 Bosch Gmbh Robert Pulse width and height converter
US4510453A (en) * 1982-07-13 1985-04-09 Westinghouse Electric Corp. Frequency modulation or pulse modulation demodulator
JPH04157916A (en) * 1990-10-22 1992-05-29 Matsushita Electric Ind Co Ltd Pulse width demodulator
TR25959A (en) * 1991-02-08 1993-11-01 Thomson Brandt Gmbh PROCEDURE AND ASSEMBLY FOR TIME / VOLTAGE CONVERSION
WO1999067885A1 (en) * 1998-06-25 1999-12-29 Siemens Aktiengesellschaft Device for quick d/a conversion of pwm signals
US6256992B1 (en) 1998-05-27 2001-07-10 Cummins Engine Company, Inc. System and method for controlling a turbocharger to maximize performance of an internal combustion engine
ES2245576A1 (en) * 2003-11-27 2006-01-01 Instituto Cientifico Y Tecnologico De Guipuzcoa, S.A. Electronic circuit for measuring voltage generated by pulse width modulation (PWM) in electrical machines includes operational amplifier, monostable units, signal integrators, solid stage switches, isolation amplifier and voltage divider
WO2009144129A3 (en) * 2008-05-30 2010-01-28 Siemens Ag Österreich Method for determining the offset of a periodic signal
US9226610B2 (en) 2011-10-04 2016-01-05 Pi-Design Ag Double-walled liquid container

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4510453A (en) * 1982-07-13 1985-04-09 Westinghouse Electric Corp. Frequency modulation or pulse modulation demodulator
FR2547935A1 (en) * 1983-06-27 1984-12-28 Bosch Gmbh Robert Pulse width and height converter
JPH04157916A (en) * 1990-10-22 1992-05-29 Matsushita Electric Ind Co Ltd Pulse width demodulator
TR25959A (en) * 1991-02-08 1993-11-01 Thomson Brandt Gmbh PROCEDURE AND ASSEMBLY FOR TIME / VOLTAGE CONVERSION
US5440307A (en) * 1991-02-08 1995-08-08 Deutsche Thomson-Brandt Gmbh Method and facility for time/voltage conversion
US6256992B1 (en) 1998-05-27 2001-07-10 Cummins Engine Company, Inc. System and method for controlling a turbocharger to maximize performance of an internal combustion engine
WO1999067885A1 (en) * 1998-06-25 1999-12-29 Siemens Aktiengesellschaft Device for quick d/a conversion of pwm signals
ES2245576A1 (en) * 2003-11-27 2006-01-01 Instituto Cientifico Y Tecnologico De Guipuzcoa, S.A. Electronic circuit for measuring voltage generated by pulse width modulation (PWM) in electrical machines includes operational amplifier, monostable units, signal integrators, solid stage switches, isolation amplifier and voltage divider
WO2009144129A3 (en) * 2008-05-30 2010-01-28 Siemens Ag Österreich Method for determining the offset of a periodic signal
CN102047558A (en) * 2008-05-30 2011-05-04 西门子公司 Method for determining the offset of a periodic signal
US8587289B2 (en) 2008-05-30 2013-11-19 Siemens Aktiengesellschaft Method for determining the offset of a periodic signal
US9226610B2 (en) 2011-10-04 2016-01-05 Pi-Design Ag Double-walled liquid container

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