JPS5732124A - Pulse detecting circuit - Google Patents

Pulse detecting circuit

Info

Publication number
JPS5732124A
JPS5732124A JP10801180A JP10801180A JPS5732124A JP S5732124 A JPS5732124 A JP S5732124A JP 10801180 A JP10801180 A JP 10801180A JP 10801180 A JP10801180 A JP 10801180A JP S5732124 A JPS5732124 A JP S5732124A
Authority
JP
Japan
Prior art keywords
resistance
comparator
switch
positive
input terminal
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
JP10801180A
Other languages
Japanese (ja)
Inventor
Takakuni Kuki
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 JP10801180A priority Critical patent/JPS5732124A/en
Publication of JPS5732124A publication Critical patent/JPS5732124A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/16—Modifications for eliminating interference voltages or currents
    • H03K17/161—Modifications for eliminating interference voltages or currents in field-effect transistor switches

Landscapes

  • Manipulation Of Pulses (AREA)

Abstract

PURPOSE:To eliminate variations of a comparison criterion without reference to a long and a short time constant, by connecting the series circuit of a switch and a resistance and the parallel circuit of the switch and another resistance to the positive and negative input terminals of a comparator. CONSTITUTION:In addition to an FET switch 6 varying the resistance value of the negative input terminal of a comparator 4 and a resistance 9, an FET switch 11, controlled together with the FET switch 6, and a resistance 10 are provided to the positive input terminal of the comparator 4. Therefore, a signal is applied to a time-constant switching control signal input terminal to turn on both the FET switches 6 and 11, and then bias currents from the positive and negative input terminal of the comparator 4 flow through resistances 3 and 10 or resistance, 8 and 9. When the FET switches 6 and 11 are turned off, the bias current flow through the resistances 3 and 8, respectively. At this time, since the resistances 9 and 10, and 3 and 8 have equal resistance values, respectively, the resistance values viewed from the positive and negative terminals of the comparator 4 are equal regardless of whether the FET switches 6 and 11 are turned on or off, thereby eliminating the influence of the bias current.
JP10801180A 1980-08-05 1980-08-05 Pulse detecting circuit Pending JPS5732124A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10801180A JPS5732124A (en) 1980-08-05 1980-08-05 Pulse detecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10801180A JPS5732124A (en) 1980-08-05 1980-08-05 Pulse detecting circuit

Publications (1)

Publication Number Publication Date
JPS5732124A true JPS5732124A (en) 1982-02-20

Family

ID=14473719

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10801180A Pending JPS5732124A (en) 1980-08-05 1980-08-05 Pulse detecting circuit

Country Status (1)

Country Link
JP (1) JPS5732124A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59137639U (en) * 1983-03-02 1984-09-13 竹中エンジニアリング工業株式会社 Comparator circuit
JPS60260223A (en) * 1984-06-06 1985-12-23 Matsushita Electric Ind Co Ltd Automatic slice circuit
JPH01188019A (en) * 1988-01-21 1989-07-27 Sharp Corp Voltage detection circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59137639U (en) * 1983-03-02 1984-09-13 竹中エンジニアリング工業株式会社 Comparator circuit
JPS60260223A (en) * 1984-06-06 1985-12-23 Matsushita Electric Ind Co Ltd Automatic slice circuit
JPH01188019A (en) * 1988-01-21 1989-07-27 Sharp Corp Voltage detection circuit

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