JPS55150614A - Voltage comparing circuit - Google Patents

Voltage comparing circuit

Info

Publication number
JPS55150614A
JPS55150614A JP5930479A JP5930479A JPS55150614A JP S55150614 A JPS55150614 A JP S55150614A JP 5930479 A JP5930479 A JP 5930479A JP 5930479 A JP5930479 A JP 5930479A JP S55150614 A JPS55150614 A JP S55150614A
Authority
JP
Japan
Prior art keywords
current value
output
fetq31
hysteresis
comparing 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
JP5930479A
Other languages
Japanese (ja)
Inventor
Tetsuya Iida
Kenro Sakagami
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP5930479A priority Critical patent/JPS55150614A/en
Priority to US06/148,724 priority patent/US4342004A/en
Priority to DE8080102692T priority patent/DE3066555D1/en
Priority to EP80102692A priority patent/EP0019279B1/en
Publication of JPS55150614A publication Critical patent/JPS55150614A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45—Differential amplifiers
    • H03F3/45071—Differential amplifiers with semiconductor devices only
    • H03F3/45479—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection
    • 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
    • G01R19/0038—Circuits for comparing several input signals and for indicating the result of this comparison, e.g. equal, different, greater, smaller (comparing pulses or pulse trains according to amplitude)
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/34—Dc amplifiers in which all stages are dc-coupled
    • H03F3/343—Dc amplifiers in which all stages are dc-coupled with semiconductor devices only
    • H03F3/345—Dc amplifiers in which all stages are dc-coupled with semiconductor devices only with field-effect devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45—Differential amplifiers
    • H03F3/45071—Differential amplifiers with semiconductor devices only
    • H03F3/45076—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier
    • H03F3/45179—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier using MOSFET transistors as the active amplifying circuit
    • H03F3/45183—Long tailed pairs
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/22—Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral
    • H03K5/24—Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral the characteristic being amplitude
    • H03K5/2472—Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral the characteristic being amplitude using field effect transistors
    • H03K5/2481—Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral the characteristic being amplitude using field effect transistors with at least one differential stage
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45371—Indexing scheme relating to differential amplifiers the AAC comprising parallel coupled multiple transistors at their source and gate and drain or at their base and emitter and collector, e.g. in a cascode dif amp, only those forming the composite common source transistor or the composite common emitter transistor respectively
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45398—Indexing scheme relating to differential amplifiers the AAC comprising a voltage generating circuit as bias circuit for the AAC
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45508—Indexing scheme relating to differential amplifiers the CSC comprising a voltage generating circuit as bias circuit for the CSC
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45658—Indexing scheme relating to differential amplifiers the LC comprising two diodes of current mirrors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45664—Indexing scheme relating to differential amplifiers the LC comprising one or more cascaded inverter stages as output stage at one output of the dif amp circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45722—Indexing scheme relating to differential amplifiers the LC comprising one or more source followers, as post buffer or driver stages, in cascade in the LC

Abstract

PURPOSE:To obtain a voltage comparing circuit strong against noise, by using a circuit, which is constituted by single channel-type MOSFETs, to give hysteresis to the I/0 characteristic of the differential amplification part. CONSTITUTION:Since FETQ31 in differential amplification part 1 of a circuit, where N channel-type MOSFETs are used entirely, is in the ON-state for comparator output V0=1, output V0 is not inverted to ''0'' unless input V1 rises until the current value of FETQ13 exceeds the current value of FET''Q14+Q31''. Since FETQ31 is in the OFF-state for output V0=0, output V0 is inverted to 1 when the voltage of input V1 is lowered until the current value of FETQ13 becomes lower than the current value of FETQ14, and thus, the I/0 characteritics has hysteresis. Here, Since the width of hysteresis is determined by conductance of FETQ31, a voltage comparing circuit strong agaist noise can be obtained by selecting properly this conductance.
JP5930479A 1979-05-15 1979-05-15 Voltage comparing circuit Pending JPS55150614A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP5930479A JPS55150614A (en) 1979-05-15 1979-05-15 Voltage comparing circuit
US06/148,724 US4342004A (en) 1979-05-15 1980-05-12 Voltage comparator circuit
DE8080102692T DE3066555D1 (en) 1979-05-15 1980-05-14 Voltage comparator circuit
EP80102692A EP0019279B1 (en) 1979-05-15 1980-05-14 Voltage comparator circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5930479A JPS55150614A (en) 1979-05-15 1979-05-15 Voltage comparing circuit

Publications (1)

Publication Number Publication Date
JPS55150614A true JPS55150614A (en) 1980-11-22

Family

ID=13109493

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5930479A Pending JPS55150614A (en) 1979-05-15 1979-05-15 Voltage comparing circuit

Country Status (1)

Country Link
JP (1) JPS55150614A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1056196A2 (en) * 1999-05-24 2000-11-29 Matsushita Electric Industrial Co., Ltd. Amplifying circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1056196A2 (en) * 1999-05-24 2000-11-29 Matsushita Electric Industrial Co., Ltd. Amplifying circuit
EP1056196A3 (en) * 1999-05-24 2003-08-06 Matsushita Electric Industrial Co., Ltd. Amplifying circuit

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