JPS568913A - Signal clamping circuit - Google Patents

Signal clamping circuit

Info

Publication number
JPS568913A
JPS568913A JP8528279A JP8528279A JPS568913A JP S568913 A JPS568913 A JP S568913A JP 8528279 A JP8528279 A JP 8528279A JP 8528279 A JP8528279 A JP 8528279A JP S568913 A JPS568913 A JP S568913A
Authority
JP
Japan
Prior art keywords
base
transistor
clamping
current
source
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
JP8528279A
Other languages
Japanese (ja)
Inventor
Yasuhiro Fujita
Takashi Katsuyama
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP8528279A priority Critical patent/JPS568913A/en
Publication of JPS568913A publication Critical patent/JPS568913A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G11/00—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general

Landscapes

  • Picture Signal Circuits (AREA)
  • Manipulation Of Pulses (AREA)

Abstract

PURPOSE:To suppress the deformation of a base voltage waveform by connecting a correcting electric current source to the base of a transistor that has its base connected to a clamping capacitor. CONSTITUTION:Clamping capacitor 3 is charged with a signal supplied from signal source 7 and when switch 4 is closed, the operation of clamping to the DC voltage of clamping bias source 5 is performed. Transistor 9 is connected to the collector circuit of transistor 1, and base current detecting circuit 11 composed of transistor 10 to its base. Further, correcting current source 13 composed of transistor 12 is connected to base current detecting circuit 11, and the collector of transistor 12 as its output terminal to the base of transistor 1. Since the output current of the correcting current source 13 is supplied to the base circuit of transistor 1, a current flowing through clamping capacitor 3 is reduced to exclude the deformation of a base voltage waveform.
JP8528279A 1979-07-05 1979-07-05 Signal clamping circuit Pending JPS568913A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8528279A JPS568913A (en) 1979-07-05 1979-07-05 Signal clamping circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8528279A JPS568913A (en) 1979-07-05 1979-07-05 Signal clamping circuit

Publications (1)

Publication Number Publication Date
JPS568913A true JPS568913A (en) 1981-01-29

Family

ID=13854205

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8528279A Pending JPS568913A (en) 1979-07-05 1979-07-05 Signal clamping circuit

Country Status (1)

Country Link
JP (1) JPS568913A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61157176A (en) * 1984-12-28 1986-07-16 Rohm Co Ltd White clip circuit
JPS61181277A (en) * 1985-02-06 1986-08-13 Oki Electric Ind Co Ltd Clamp circuit
JPH01137780A (en) * 1987-11-24 1989-05-30 Matsushita Electric Ind Co Ltd Clamp circuit
JPH01175466A (en) * 1987-12-29 1989-07-11 Matsushita Electric Ind Co Ltd Input clamping circuit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52119057A (en) * 1976-03-31 1977-10-06 Sony Corp Hold circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52119057A (en) * 1976-03-31 1977-10-06 Sony Corp Hold circuit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61157176A (en) * 1984-12-28 1986-07-16 Rohm Co Ltd White clip circuit
JPH0736610B2 (en) * 1984-12-28 1995-04-19 ロ−ム株式会社 White clip circuit
JPS61181277A (en) * 1985-02-06 1986-08-13 Oki Electric Ind Co Ltd Clamp circuit
JPH01137780A (en) * 1987-11-24 1989-05-30 Matsushita Electric Ind Co Ltd Clamp circuit
JPH01175466A (en) * 1987-12-29 1989-07-11 Matsushita Electric Ind Co Ltd Input clamping circuit

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