JPS54113212A - Gate-type peak detector circuit - Google Patents

Gate-type peak detector circuit

Info

Publication number
JPS54113212A
JPS54113212A JP1981178A JP1981178A JPS54113212A JP S54113212 A JPS54113212 A JP S54113212A JP 1981178 A JP1981178 A JP 1981178A JP 1981178 A JP1981178 A JP 1981178A JP S54113212 A JPS54113212 A JP S54113212A
Authority
JP
Japan
Prior art keywords
trq
circuit
peak detector
detector circuit
color burst
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
JP1981178A
Other languages
Japanese (ja)
Inventor
Shigeaki Minamibata
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 Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP1981178A priority Critical patent/JPS54113212A/en
Publication of JPS54113212A publication Critical patent/JPS54113212A/en
Pending legal-status Critical Current

Links

Landscapes

  • Processing Of Color Television Signals (AREA)

Abstract

PURPOSE: To improve a noise-proof property by adding a switching transistor to a peak detector circuit to give a gate function to the circuit and operating the circuit only during the color burst signal imput time.
CONSTITUTION: Composite chroma signals are applied to the base of transistor TrQ1 throgh coupling capacitor C1, and TrQ3 and this TrQ1 form a differential amplifier. Here, pulse signals synchronizing with color burst signals are inputted to TrQ2 connected to the emitter of TrQ3, and a smoothing circuit consistig of resistance R5 and capacitor C2 is provided in the collector of TrQ1. As a result, since switching TrQ2 is added to a peak detector circuit to give a gate function to this circuit, the circuit is operated only during the color burst signal input fixed time, so that the noise-proof property can be improved.
COPYRIGHT: (C)1979,JPO&Japio
JP1981178A 1978-02-24 1978-02-24 Gate-type peak detector circuit Pending JPS54113212A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1981178A JPS54113212A (en) 1978-02-24 1978-02-24 Gate-type peak detector circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1981178A JPS54113212A (en) 1978-02-24 1978-02-24 Gate-type peak detector circuit

Publications (1)

Publication Number Publication Date
JPS54113212A true JPS54113212A (en) 1979-09-04

Family

ID=12009705

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1981178A Pending JPS54113212A (en) 1978-02-24 1978-02-24 Gate-type peak detector circuit

Country Status (1)

Country Link
JP (1) JPS54113212A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5715593A (en) * 1980-07-02 1982-01-26 Hitachi Ltd Integrated circuit for peak detection

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5715593A (en) * 1980-07-02 1982-01-26 Hitachi Ltd Integrated circuit for peak detection
JPH0154913B2 (en) * 1980-07-02 1989-11-21 Hitachi Ltd

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