JPS5597730A - Schmitt circuit - Google Patents

Schmitt circuit

Info

Publication number
JPS5597730A
JPS5597730A JP589579A JP589579A JPS5597730A JP S5597730 A JPS5597730 A JP S5597730A JP 589579 A JP589579 A JP 589579A JP 589579 A JP589579 A JP 589579A JP S5597730 A JPS5597730 A JP S5597730A
Authority
JP
Japan
Prior art keywords
transistor
diodes
decrease
schmitt circuit
constant current
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
JP589579A
Other languages
Japanese (ja)
Other versions
JPS5935212B2 (en
Inventor
Masaaki Tanioka
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP54005895A priority Critical patent/JPS5935212B2/en
Publication of JPS5597730A publication Critical patent/JPS5597730A/en
Publication of JPS5935212B2 publication Critical patent/JPS5935212B2/en
Expired 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

Abstract

PURPOSE:To set hysteresis width by a constant current value by a Schmitt circuit using a differential amplifier and constantcurrent supply. CONSTITUTION:Once an input voltage is applied, transistor 22 conducts and transistors 26-28 also conduct, so that transistor 26 will absorb constant current source I2. As a result, currents of diodes 36 and 37 decrease and the base voltage of transistor 26 falls through posivive feedback. Further, since transistor 29 is OFF and current I3 is supplied to transistor 25, currents flowing to diodes 36 and 37 decrease. Transistor 23 is biased by currents flowing through diode 36 and 37 and those current are varied to vary prositive and negative threshold voltages VT<+> and VT<-> independently.
JP54005895A 1979-01-19 1979-01-19 Schmitt circuit Expired JPS5935212B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54005895A JPS5935212B2 (en) 1979-01-19 1979-01-19 Schmitt circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54005895A JPS5935212B2 (en) 1979-01-19 1979-01-19 Schmitt circuit

Publications (2)

Publication Number Publication Date
JPS5597730A true JPS5597730A (en) 1980-07-25
JPS5935212B2 JPS5935212B2 (en) 1984-08-27

Family

ID=11623619

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54005895A Expired JPS5935212B2 (en) 1979-01-19 1979-01-19 Schmitt circuit

Country Status (1)

Country Link
JP (1) JPS5935212B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0918297A (en) * 1995-06-29 1997-01-17 Nec Corp Comparator with hysteresis

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6370421U (en) * 1986-10-29 1988-05-11

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0918297A (en) * 1995-06-29 1997-01-17 Nec Corp Comparator with hysteresis

Also Published As

Publication number Publication date
JPS5935212B2 (en) 1984-08-27

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