JPS54159152A - Voltage comparison circuit - Google Patents

Voltage comparison circuit

Info

Publication number
JPS54159152A
JPS54159152A JP6778378A JP6778378A JPS54159152A JP S54159152 A JPS54159152 A JP S54159152A JP 6778378 A JP6778378 A JP 6778378A JP 6778378 A JP6778378 A JP 6778378A JP S54159152 A JPS54159152 A JP S54159152A
Authority
JP
Japan
Prior art keywords
voltage
input
circuit
output
comparison 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.)
Pending
Application number
JP6778378A
Other languages
Japanese (ja)
Inventor
Kazuo Watanabe
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 Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP6778378A priority Critical patent/JPS54159152A/en
Publication of JPS54159152A publication Critical patent/JPS54159152A/en
Pending 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

Abstract

PURPOSE:To establish the voltage comparison circuit of high accuracy, by providing the comparison circuit between the reference potential and input voltage and the differential amplifying circuit to one of the inputs of which the reference voltage is applied and in which the output is negative-fed back to another input. CONSTITUTION:The differential amplifying circuit taking the input of the output of the level shift circuits Q4 to Q6 and Q7 to Q9 to which the reference voltage Vref is applied to the input, consists of the differential pair transistors TrQ24 and Q25, emitter constant current TrQ26 resistor R16, and output TrQ27, Q28, and negative feedback is made to the base of TrQ25 via the registor R18. This differential circuit constitutes the voltage follower circuit of the level shift circuits Q7 to Q9 giving the comparison reference voltage. TrQ30 to Q34 constitute the voltage comparison circuit of the output voltage of the level shift circuits Q1 to Q3 taking the input voltage Vi as the input and of the reference voltage with the resistor R21, and the threshold voltage of the voltage comparison is independent of the dispersion if the gain of Tr through the same form of the negative feedback differential circuits Q24 to Q28, allowing to establish the voltage comparison circuit of high accuracy.
JP6778378A 1978-06-07 1978-06-07 Voltage comparison circuit Pending JPS54159152A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6778378A JPS54159152A (en) 1978-06-07 1978-06-07 Voltage comparison circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6778378A JPS54159152A (en) 1978-06-07 1978-06-07 Voltage comparison circuit

Publications (1)

Publication Number Publication Date
JPS54159152A true JPS54159152A (en) 1979-12-15

Family

ID=13354895

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6778378A Pending JPS54159152A (en) 1978-06-07 1978-06-07 Voltage comparison circuit

Country Status (1)

Country Link
JP (1) JPS54159152A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5991721A (en) * 1982-11-17 1984-05-26 Nec Corp Comparison circuit
JPH05175802A (en) * 1991-12-24 1993-07-13 Nec Corp Comparator circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5991721A (en) * 1982-11-17 1984-05-26 Nec Corp Comparison circuit
JPH0347608B2 (en) * 1982-11-17 1991-07-19 Nippon Denki Kk
JPH05175802A (en) * 1991-12-24 1993-07-13 Nec Corp Comparator circuit

Similar Documents

Publication Publication Date Title
ES402652A1 (en) Amplifier circuit
GB1364233A (en) High performance solid state amplifier
JPS6432710A (en) Linear differential amplifier amplifier
KR830005764A (en) Volume control circuit
KR830006994A (en) Current Type 4th Active Filter
JPS5728410A (en) Voltage controlled type variable gain circuit
JPS54159152A (en) Voltage comparison circuit
GB1469990A (en) Gain control circuit
KR910017735A (en) Amplifier device
JPS5623048A (en) Control circuit for signal level
JPS57155810A (en) Negative feedback type amplifier
JPS5215252A (en) Amplifier
GB765398A (en) Improvements in or relating to transistor circuits having variable amplification
JPS5445183A (en) Speed signal former
SU587470A1 (en) Operational amplifier
JPS5491034A (en) Variable attenuator circuit of voltage control type
JPS5539432A (en) Differential amplifier circuit
JPS54128251A (en) Mute circuit
JPS5711513A (en) Variable gain amplifying circuit
JPS5671316A (en) Base clip circuit
JPS5585115A (en) Gain control and amplifying circuit
JPS5526748A (en) Voltage-current converter circuit
JPS5634210A (en) Agc circuit
JPS53142849A (en) Differential amplifier
JPS5672509A (en) Dc gain control device