JPS5547726A - Schmitt trigger circuit - Google Patents

Schmitt trigger circuit

Info

Publication number
JPS5547726A
JPS5547726A JP12220578A JP12220578A JPS5547726A JP S5547726 A JPS5547726 A JP S5547726A JP 12220578 A JP12220578 A JP 12220578A JP 12220578 A JP12220578 A JP 12220578A JP S5547726 A JPS5547726 A JP S5547726A
Authority
JP
Japan
Prior art keywords
constant current
current source
interrupted
conductive
threshold voltage
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
JP12220578A
Other languages
Japanese (ja)
Other versions
JPS6260850B2 (en
Inventor
Hiroto Motoyoshi
Yukio Miyazaki
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 JP12220578A priority Critical patent/JPS5547726A/en
Publication of JPS5547726A publication Critical patent/JPS5547726A/en
Publication of JPS6260850B2 publication Critical patent/JPS6260850B2/ja
Granted 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
    • H03K3/26—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback
    • H03K3/28—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback
    • H03K3/281—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator
    • H03K3/286—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator bistable
    • H03K3/2893—Bistables with hysteresis, e.g. Schmitt trigger
    • H03K3/2897—Bistables with hysteresis, e.g. Schmitt trigger with an input circuit of differential configuration

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)

Abstract

PURPOSE:To establish the circuit providing the means achieved by the parameters two or more independently for the setting of the threshold voltage and the hysteresis width. CONSTITUTION:When the input signal 28 is not fed between the input terminals 26 and 27 of transistors Tr21,22 constituting the differenteal amplifier, since Tr21 is in saturation and Tr22 is non-conductive, the first constant current source 100 is interrupted and the second constant current source 200 is conductive to flow the constant current I2 to the resistor 31. Accordingly, the positive threshold voltage VT+ is R31.I2. Next, when the voltage fed to the input terminals 26 and 27 is a value more than the said VT+, Tr21 is interrupted and Tr22 is in saturation. The first constant current source 100 is conductive and the second constant current source 200 is interrupted to flow the constant current I1 to the resistor 29. Accordingly, the negative threshold voltage VT- is -R29.I1.
JP12220578A 1978-10-03 1978-10-03 Schmitt trigger circuit Granted JPS5547726A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12220578A JPS5547726A (en) 1978-10-03 1978-10-03 Schmitt trigger circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12220578A JPS5547726A (en) 1978-10-03 1978-10-03 Schmitt trigger circuit

Publications (2)

Publication Number Publication Date
JPS5547726A true JPS5547726A (en) 1980-04-04
JPS6260850B2 JPS6260850B2 (en) 1987-12-18

Family

ID=14830144

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12220578A Granted JPS5547726A (en) 1978-10-03 1978-10-03 Schmitt trigger circuit

Country Status (1)

Country Link
JP (1) JPS5547726A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007236043A (en) * 2006-02-28 2007-09-13 Omron Corp Dc motor control circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007236043A (en) * 2006-02-28 2007-09-13 Omron Corp Dc motor control circuit

Also Published As

Publication number Publication date
JPS6260850B2 (en) 1987-12-18

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