JPS5726922A - Voltage comparator - Google Patents

Voltage comparator

Info

Publication number
JPS5726922A
JPS5726922A JP10147580A JP10147580A JPS5726922A JP S5726922 A JPS5726922 A JP S5726922A JP 10147580 A JP10147580 A JP 10147580A JP 10147580 A JP10147580 A JP 10147580A JP S5726922 A JPS5726922 A JP S5726922A
Authority
JP
Japan
Prior art keywords
voltage comparator
voltage
comparator
switch
current source
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
JP10147580A
Other languages
Japanese (ja)
Inventor
Yoshikuni Hoshino
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP10147580A priority Critical patent/JPS5726922A/en
Publication of JPS5726922A publication Critical patent/JPS5726922A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/023—Generators characterised by the type of circuit or by the means used for producing pulses by the use of differential amplifiers or comparators, with internal or external positive feedback
    • H03K3/0233—Bistable circuits
    • H03K3/02337—Bistables with hysteresis, e.g. Schmitt trigger

Landscapes

  • Manipulation Of Pulses (AREA)
  • Electronic Switches (AREA)

Abstract

PURPOSE:To give a fine hysteresis characteristic to a voltage comparator, by connecting a current source according to the output state of the voltage comparator. CONSTITUTION:A switch SW is closed when the output VOUT of a comparator is at high level and opened at a low level. The connecting point voltage of resistors R1, R2 is a compared reference voltage VREF of a voltage comparator A, and since a current source IH is switched through the switching of the switch SW, the value VREF is changed and the changed part gives the hysteresis width.
JP10147580A 1980-07-24 1980-07-24 Voltage comparator Pending JPS5726922A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10147580A JPS5726922A (en) 1980-07-24 1980-07-24 Voltage comparator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10147580A JPS5726922A (en) 1980-07-24 1980-07-24 Voltage comparator

Publications (1)

Publication Number Publication Date
JPS5726922A true JPS5726922A (en) 1982-02-13

Family

ID=14301750

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10147580A Pending JPS5726922A (en) 1980-07-24 1980-07-24 Voltage comparator

Country Status (1)

Country Link
JP (1) JPS5726922A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59104823A (en) * 1982-12-07 1984-06-16 Matsushita Electric Ind Co Ltd Waveform shaper
JPS59104817A (en) * 1982-12-07 1984-06-16 Matsushita Electric Ind Co Ltd Hysteresis comparator
JPS59188226A (en) * 1983-04-11 1984-10-25 Hitachi Ltd Comparator circuit
JPS6125319A (en) * 1984-07-13 1986-02-04 Matsushita Electric Ind Co Ltd Comparator
JPS61156915A (en) * 1984-12-28 1986-07-16 Oki Electric Ind Co Ltd Threshold value switching circuit
EP0322842A2 (en) * 1987-12-26 1989-07-05 Kabushiki Kaisha Toshiba Voltage comparator having hysteresis characteristics
US5565802A (en) * 1993-09-08 1996-10-15 Nec Corporation Semiconductor device with differential amplifier operable at high speed
EP0738041A1 (en) * 1995-04-13 1996-10-16 Hewlett-Packard GmbH Electronic circuit comprising a comparator

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51150961A (en) * 1975-06-20 1976-12-24 Nippon Gakki Seizo Kk Digital analog converter
JPS54151360A (en) * 1978-04-11 1979-11-28 Mitsubishi Electric Corp Schmitt trigger circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51150961A (en) * 1975-06-20 1976-12-24 Nippon Gakki Seizo Kk Digital analog converter
JPS54151360A (en) * 1978-04-11 1979-11-28 Mitsubishi Electric Corp Schmitt trigger circuit

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59104823A (en) * 1982-12-07 1984-06-16 Matsushita Electric Ind Co Ltd Waveform shaper
JPS59104817A (en) * 1982-12-07 1984-06-16 Matsushita Electric Ind Co Ltd Hysteresis comparator
JPH0449288B2 (en) * 1982-12-07 1992-08-11 Matsushita Electric Ind Co Ltd
JPS59188226A (en) * 1983-04-11 1984-10-25 Hitachi Ltd Comparator circuit
JPS6125319A (en) * 1984-07-13 1986-02-04 Matsushita Electric Ind Co Ltd Comparator
JPS61156915A (en) * 1984-12-28 1986-07-16 Oki Electric Ind Co Ltd Threshold value switching circuit
JPH0588566B2 (en) * 1984-12-28 1993-12-22 Oki Denki Kogyo Kk
EP0322842A2 (en) * 1987-12-26 1989-07-05 Kabushiki Kaisha Toshiba Voltage comparator having hysteresis characteristics
US5565802A (en) * 1993-09-08 1996-10-15 Nec Corporation Semiconductor device with differential amplifier operable at high speed
EP0738041A1 (en) * 1995-04-13 1996-10-16 Hewlett-Packard GmbH Electronic circuit comprising a comparator

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