JPS57124980A - Clamp circuit - Google Patents

Clamp circuit

Info

Publication number
JPS57124980A
JPS57124980A JP1107981A JP1107981A JPS57124980A JP S57124980 A JPS57124980 A JP S57124980A JP 1107981 A JP1107981 A JP 1107981A JP 1107981 A JP1107981 A JP 1107981A JP S57124980 A JPS57124980 A JP S57124980A
Authority
JP
Japan
Prior art keywords
circuit
synchronizing signal
peak
clamp
level
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
JP1107981A
Other languages
Japanese (ja)
Other versions
JPS6324591B2 (en
Inventor
Masaaki Kato
Keisuke Ogi
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP1107981A priority Critical patent/JPS57124980A/en
Publication of JPS57124980A publication Critical patent/JPS57124980A/en
Publication of JPS6324591B2 publication Critical patent/JPS6324591B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/16—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Picture Signal Circuits (AREA)
  • Television Systems (AREA)

Abstract

PURPOSE:To achieve DC regeneration simply and effectively, by the constitution that a type of peak clamp is made digitally and pedestal clamp is made after a synchronizing signal reaches a state that it is normally separated. CONSTITUTION:When a synchronizing signal is not separated normally, a type of peak clamp circuit consisting of an A/D converter 13, peak clamp level generating circuit 18, comparison circuit 16, constant value generating circuit 24, integration circuit 26, D/A converter 12 and addition circuit 11, is formed, and the synchronizing signal is peak-clamped by this. After the synchronizing signal is peak-clamped, the synchronizing signal is normally separated at a synchronizing separation circuit 15 and a flip-flop 25 is set. Thus, swtiching circuits 19, 23 select the output of a timing generation circuit 20 and the level error signal of an error operation circuit 21 and give them to the integration circuit 26. The pedestal level is the output of a reference level generator 22. Clamping is made to the reference level.
JP1107981A 1981-01-28 1981-01-28 Clamp circuit Granted JPS57124980A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1107981A JPS57124980A (en) 1981-01-28 1981-01-28 Clamp circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1107981A JPS57124980A (en) 1981-01-28 1981-01-28 Clamp circuit

Publications (2)

Publication Number Publication Date
JPS57124980A true JPS57124980A (en) 1982-08-04
JPS6324591B2 JPS6324591B2 (en) 1988-05-21

Family

ID=11767968

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1107981A Granted JPS57124980A (en) 1981-01-28 1981-01-28 Clamp circuit

Country Status (1)

Country Link
JP (1) JPS57124980A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60113586A (en) * 1983-11-24 1985-06-20 Nec Corp Clamping device
JPS6245284A (en) * 1985-08-23 1987-02-27 Nec Home Electronics Ltd Dc restoration circuit for television signal
JPS62104382A (en) * 1985-10-31 1987-05-14 Nec Corp Clamping circuit
JPS62159982A (en) * 1986-01-08 1987-07-15 Matsushita Electric Ind Co Ltd Television signal clamp device
JPS63116573A (en) * 1986-11-04 1988-05-20 Sanyo Electric Co Ltd Clamping circuit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60113586A (en) * 1983-11-24 1985-06-20 Nec Corp Clamping device
JPS6245284A (en) * 1985-08-23 1987-02-27 Nec Home Electronics Ltd Dc restoration circuit for television signal
JPS62104382A (en) * 1985-10-31 1987-05-14 Nec Corp Clamping circuit
JPS62159982A (en) * 1986-01-08 1987-07-15 Matsushita Electric Ind Co Ltd Television signal clamp device
JPS63116573A (en) * 1986-11-04 1988-05-20 Sanyo Electric Co Ltd Clamping circuit

Also Published As

Publication number Publication date
JPS6324591B2 (en) 1988-05-21

Similar Documents

Publication Publication Date Title
JPS57171868A (en) Waveform shaping circuit
JPS57124980A (en) Clamp circuit
DE3689366T2 (en) Line output circuit for generating a line-frequency sawtooth current.
JPS51115619A (en) Dc-dc convertor circuit
JPS52119249A (en) Photoelectric detector
JPS57113771A (en) Rectifying circuit for sampling
JPS5743575A (en) Control device of current type inverter
JPS5221653A (en) Dc voltage converter
JPS52152144A (en) Integrated circuti
JPS5422078A (en) Command circuit
JPS5525208A (en) Horizontal automatic frequency control circuit
JPS5426423A (en) Starting controller for parallel resonance inverter
JPS52137242A (en) Pulse signal generator
JPS544558A (en) Analog-to-digital converter
JPS5642453A (en) Level converter
JPS5718167A (en) Clamping circuit
JPS5317924A (en) Dc-dc converter
JPS52131447A (en) Bipolar a/d converter
JPS51111626A (en) Forced commutation type inverter
JPS5379360A (en) Trigger pulse generating circuit
JPS5310954A (en) Am detecting circuit
JPS5359821A (en) Bipolar current transformer
JPS544043A (en) Integration circuit
JPS5416650A (en) Phase regulation system for inverter output voltage
JPS535731A (en) Inverter