JPS57161660A - Trigger circuit for oscilloscope - Google Patents

Trigger circuit for oscilloscope

Info

Publication number
JPS57161660A
JPS57161660A JP4871781A JP4871781A JPS57161660A JP S57161660 A JPS57161660 A JP S57161660A JP 4871781 A JP4871781 A JP 4871781A JP 4871781 A JP4871781 A JP 4871781A JP S57161660 A JPS57161660 A JP S57161660A
Authority
JP
Japan
Prior art keywords
amplifier
output
trigger
input
resistor
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
JP4871781A
Other languages
Japanese (ja)
Inventor
Akira Kaneko
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.)
Hitachi Denshi KK
Original Assignee
Hitachi Denshi KK
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 Hitachi Denshi KK filed Critical Hitachi Denshi KK
Priority to JP4871781A priority Critical patent/JPS57161660A/en
Publication of JPS57161660A publication Critical patent/JPS57161660A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R13/00—Arrangements for displaying electric variables or waveforms
    • G01R13/20—Cathode-ray oscilloscopes
    • G01R13/22—Circuits therefor
    • G01R13/32—Circuits for displaying non-recurrent functions such as transients; Circuits for triggering; Circuits for synchronisation; Circuits for time-base expansion

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Amplifiers (AREA)

Abstract

PURPOSE:To stabilize D.C. characteristics including offset voltage in a trigger amplifier by giving the output of the trigger amplifier to the input thereof as negative feedback by using a differential amplifier whose alternating-current transmission characteristics are suppressed. CONSTITUTION:A trigger amplifier TA is provided with a differential amplifier DA separately. Between the inversion input and the output of this amplifier DA, a capacitor C2 for alternating current negative feedback is inserted as a feedback circuit, and thereby the alternating-current transmission characteristics of the amplifier DA is suppressed and the amplifier DA passes only direct current. In addition, the output of the amplifier TA is impressed on the inversion input of the amplifier DA through the intermediary of a resistor R3, while the output of a voltage division circuit by a potentiometer RV1 is impressed thereon through the intermediary of a resistor R4, and the output of the amplifier DA is inputted in the amplifier TA via a resistor R5. The output of the amplifier TA is given to the input of the amplifier TA as negative feedback by this constitution, while a voltage for setting a trigger level is fixed in accordance with the adjustment by the potentiometer RV1. Thus, it becomes easy to maintain the input impedance of a trigger input terminal TRG.IN at a high value.
JP4871781A 1981-03-31 1981-03-31 Trigger circuit for oscilloscope Pending JPS57161660A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4871781A JPS57161660A (en) 1981-03-31 1981-03-31 Trigger circuit for oscilloscope

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4871781A JPS57161660A (en) 1981-03-31 1981-03-31 Trigger circuit for oscilloscope

Publications (1)

Publication Number Publication Date
JPS57161660A true JPS57161660A (en) 1982-10-05

Family

ID=12811044

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4871781A Pending JPS57161660A (en) 1981-03-31 1981-03-31 Trigger circuit for oscilloscope

Country Status (1)

Country Link
JP (1) JPS57161660A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5082963A (en) * 1973-11-05 1975-07-04
JPS5622816B2 (en) * 1977-04-06 1981-05-27

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5082963A (en) * 1973-11-05 1975-07-04
JPS5622816B2 (en) * 1977-04-06 1981-05-27

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