JPS5518106A - Switch circuit - Google Patents

Switch circuit

Info

Publication number
JPS5518106A
JPS5518106A JP9000278A JP9000278A JPS5518106A JP S5518106 A JPS5518106 A JP S5518106A JP 9000278 A JP9000278 A JP 9000278A JP 9000278 A JP9000278 A JP 9000278A JP S5518106 A JPS5518106 A JP S5518106A
Authority
JP
Japan
Prior art keywords
input
transistor
resistance
amplifier
input signal
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
JP9000278A
Other languages
Japanese (ja)
Inventor
Hisanori Matsuda
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 JP9000278A priority Critical patent/JPS5518106A/en
Publication of JPS5518106A publication Critical patent/JPS5518106A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To prevent occurrence of the foreign sound caused by the charge and discharge of the output coupling capacitor without changing the bias voltage of the current differential operational amplifier by turning on and off the output of the amplifier.
CONSTITUTION: The input signal sent from IN is put into input resistances 12, 14 and 17 after its DC component deleted. These input resistances form the input circuit of DC differential operational amplifier 21 and at the same time part of the power supply circuit of switching transistor 15. Transistor 15 is connected between input resistance 14 and 17, and the impedance of transistor 15 is smaller enough than resistance 17 when it is on. As a result, no input signal is transmitted to the input side of amplifier 21. When transistor 15 is off, the input signal is transmitted to the input side of 21 via resistance 17.
COPYRIGHT: (C)1980,JPO&Japio
JP9000278A 1978-07-25 1978-07-25 Switch circuit Pending JPS5518106A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9000278A JPS5518106A (en) 1978-07-25 1978-07-25 Switch circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9000278A JPS5518106A (en) 1978-07-25 1978-07-25 Switch circuit

Publications (1)

Publication Number Publication Date
JPS5518106A true JPS5518106A (en) 1980-02-08

Family

ID=13986388

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9000278A Pending JPS5518106A (en) 1978-07-25 1978-07-25 Switch circuit

Country Status (1)

Country Link
JP (1) JPS5518106A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06254347A (en) * 1993-03-09 1994-09-13 Nippon Shokubai Co Ltd Deodorizing method and device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06254347A (en) * 1993-03-09 1994-09-13 Nippon Shokubai Co Ltd Deodorizing method and device

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