JPS5748825A - Schmitt circuit - Google Patents

Schmitt circuit

Info

Publication number
JPS5748825A
JPS5748825A JP12432980A JP12432980A JPS5748825A JP S5748825 A JPS5748825 A JP S5748825A JP 12432980 A JP12432980 A JP 12432980A JP 12432980 A JP12432980 A JP 12432980A JP S5748825 A JPS5748825 A JP S5748825A
Authority
JP
Japan
Prior art keywords
fets
driver
channel
circuit
schmitt 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
JP12432980A
Other languages
Japanese (ja)
Inventor
Hiroshi Koyada
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 JP12432980A priority Critical patent/JPS5748825A/en
Publication of JPS5748825A publication Critical patent/JPS5748825A/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
    • H03K3/353—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of field-effect transistors with internal or external positive feedback
    • H03K3/356—Bistable circuits
    • H03K3/3565—Bistables with hysteresis, e.g. Schmitt trigger

Abstract

PURPOSE:To set the high or low level of threshold of a circuit independently, by constituting the circuit with three sets of inverters consisting of complementary IG-FETs and a driver consisting of cascade connection of the IG-FETs. CONSTITUTION:A Schmitt circuit is constituted with three sets of inverters 16-18 consisting of complementary IG-FETs 7, 8-11, 12, and a driver 19 consisting of the cascade connection of P channel IG-FETs 5, 13 and N channel IG-FETs 6, 14. The high level of the threshold TH of the Schmitt circuit is decided with the gm of the FETs 6, 14 of the driver 19 and of a P channel IG-FET9 of an inverter 17, and the low level is the ratio of gm between the FETs 5, 13 of the driver 19 and the N channel IG-FET10 of the inverter 17. The FET14 turns on only when the input level changes from 0 to 1 and the FET13 turns on only when the input level changes from 1 to 0, then the high level of the TH of the Schmitt circuit is obtained by adjusting the gm of the FET6 or 14 and the low level is obtained by adjusting the gm of the FET5 or 13 independently.
JP12432980A 1980-09-08 1980-09-08 Schmitt circuit Pending JPS5748825A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12432980A JPS5748825A (en) 1980-09-08 1980-09-08 Schmitt circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12432980A JPS5748825A (en) 1980-09-08 1980-09-08 Schmitt circuit

Publications (1)

Publication Number Publication Date
JPS5748825A true JPS5748825A (en) 1982-03-20

Family

ID=14882636

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12432980A Pending JPS5748825A (en) 1980-09-08 1980-09-08 Schmitt circuit

Country Status (1)

Country Link
JP (1) JPS5748825A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0230306A2 (en) * 1986-01-22 1987-07-29 Nec Corporation Schmitt trigger circuit
JPH05327461A (en) * 1992-05-26 1993-12-10 Mitsubishi Electric Corp Input circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0230306A2 (en) * 1986-01-22 1987-07-29 Nec Corporation Schmitt trigger circuit
US4719367A (en) * 1986-01-22 1988-01-12 Nec Corportion Schmitt trigger circuit
JPH05327461A (en) * 1992-05-26 1993-12-10 Mitsubishi Electric Corp Input circuit
JP2905000B2 (en) * 1992-05-26 1999-06-14 三菱電機株式会社 Input circuit

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