JPS5690495A - Integrated circuit amplifier used in combination with holding capacitor - Google Patents

Integrated circuit amplifier used in combination with holding capacitor

Info

Publication number
JPS5690495A
JPS5690495A JP16857279A JP16857279A JPS5690495A JP S5690495 A JPS5690495 A JP S5690495A JP 16857279 A JP16857279 A JP 16857279A JP 16857279 A JP16857279 A JP 16857279A JP S5690495 A JPS5690495 A JP S5690495A
Authority
JP
Japan
Prior art keywords
current
input
base
integrated circuit
capacitor
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
JP16857279A
Other languages
Japanese (ja)
Other versions
JPS636956B2 (en
Inventor
Tamio Murano
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP16857279A priority Critical patent/JPS5690495A/en
Publication of JPS5690495A publication Critical patent/JPS5690495A/en
Publication of JPS636956B2 publication Critical patent/JPS636956B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Manipulation Of Pulses (AREA)
  • Amplifiers (AREA)

Abstract

PURPOSE: To prevent the fluctuations of the holding valtage of a capacitor owing to input current by providing another current route flowing the current equal to the input current component of the capacitor to the combined circuit of an integrated circuit amplifier and a holding capacitor.
CONSTITUTION: An input compensating circuit CC is provided in order to prevent the fluctuations of the holding voltage by the input current of an integrated circuit amplifier OP used in combination with a holding capacitor CH. This is constituted of Trs Q7WQ12' and the emitter area of Q7 is 1/2 that of a current source Tr Q1. Since the bias of its base is made common, this serves as a current source of the current value is 1/2 that of Q1. TrQ8 is of the same characteristics as those of input stages Q2, Q3 and is disposed adjacently to these. Since the TrQ8 is applied with the current of the current source Q7 at its emitter, the base curret of the TrQ8 assumes the same value as that of the base current of the Q3. This current is connected to + input terminal, that is, the base terminal of Q3 via the current mirror circuit of TrsQ10, Q11, Q12, whereby the base current of the Q3 is negated approximately.
COPYRIGHT: (C)1981,JPO&Japio
JP16857279A 1979-12-25 1979-12-25 Integrated circuit amplifier used in combination with holding capacitor Granted JPS5690495A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16857279A JPS5690495A (en) 1979-12-25 1979-12-25 Integrated circuit amplifier used in combination with holding capacitor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16857279A JPS5690495A (en) 1979-12-25 1979-12-25 Integrated circuit amplifier used in combination with holding capacitor

Publications (2)

Publication Number Publication Date
JPS5690495A true JPS5690495A (en) 1981-07-22
JPS636956B2 JPS636956B2 (en) 1988-02-13

Family

ID=15870522

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16857279A Granted JPS5690495A (en) 1979-12-25 1979-12-25 Integrated circuit amplifier used in combination with holding capacitor

Country Status (1)

Country Link
JP (1) JPS5690495A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58200610A (en) * 1982-05-18 1983-11-22 Sony Corp Buffer circuit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54109353A (en) * 1978-02-15 1979-08-27 Nec Corp Sample holding circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54109353A (en) * 1978-02-15 1979-08-27 Nec Corp Sample holding circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58200610A (en) * 1982-05-18 1983-11-22 Sony Corp Buffer circuit
JPH0452649B2 (en) * 1982-05-18 1992-08-24 Sony Corp

Also Published As

Publication number Publication date
JPS636956B2 (en) 1988-02-13

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