JPS54137944A - Signal processing circuit - Google Patents

Signal processing circuit

Info

Publication number
JPS54137944A
JPS54137944A JP4634278A JP4634278A JPS54137944A JP S54137944 A JPS54137944 A JP S54137944A JP 4634278 A JP4634278 A JP 4634278A JP 4634278 A JP4634278 A JP 4634278A JP S54137944 A JPS54137944 A JP S54137944A
Authority
JP
Japan
Prior art keywords
voltage
diode
terminal
reference voltage
signal processing
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.)
Granted
Application number
JP4634278A
Other languages
Japanese (ja)
Other versions
JPS5921216B2 (en
Inventor
Takashi Yamamoto
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP4634278A priority Critical patent/JPS5921216B2/en
Publication of JPS54137944A publication Critical patent/JPS54137944A/en
Publication of JPS5921216B2 publication Critical patent/JPS5921216B2/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
    • G01R19/16576—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing DC or AC voltage with one threshold
    • G01R19/1658—AC voltage or recurrent signals

Abstract

PURPOSE:To eliminate the influence of the variation in power voltage upon an operation level by inserting a diode between the reference voltage terminal and signal input terminal of a voltage comparator using an operational amplifier. CONSTITUTION:Reference voltage terminal 1 is applied with voltage VE obtained by dividing power voltage VCC by resistances R3 and R4, and signal input terminal 2 is with voltage VF obtained by internal impedance Z of diode D and resistance R2. Even if power voltage VCC changes when no input signal Vin arrives, a difference in voltage applied to terminals 1 and 2 is below voltage drop VD of diode D and seldom changes. When input voltage Vin arrives, on the other hand, the impedance at the earth side viewed from terminal 2 is R4 as far as R2>>R4>>Z, and there is a little influence of the insertion of diode D upon the reference voltage.
JP4634278A 1978-04-18 1978-04-18 signal processing circuit Expired JPS5921216B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4634278A JPS5921216B2 (en) 1978-04-18 1978-04-18 signal processing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4634278A JPS5921216B2 (en) 1978-04-18 1978-04-18 signal processing circuit

Publications (2)

Publication Number Publication Date
JPS54137944A true JPS54137944A (en) 1979-10-26
JPS5921216B2 JPS5921216B2 (en) 1984-05-18

Family

ID=12744455

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4634278A Expired JPS5921216B2 (en) 1978-04-18 1978-04-18 signal processing circuit

Country Status (1)

Country Link
JP (1) JPS5921216B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS604036U (en) * 1983-06-22 1985-01-12 日立電子エンジニアリング株式会社 analog comparator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS604036U (en) * 1983-06-22 1985-01-12 日立電子エンジニアリング株式会社 analog comparator

Also Published As

Publication number Publication date
JPS5921216B2 (en) 1984-05-18

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