JPS5723306A - Amplifying circuit - Google Patents

Amplifying circuit

Info

Publication number
JPS5723306A
JPS5723306A JP9023480A JP9023480A JPS5723306A JP S5723306 A JPS5723306 A JP S5723306A JP 9023480 A JP9023480 A JP 9023480A JP 9023480 A JP9023480 A JP 9023480A JP S5723306 A JPS5723306 A JP S5723306A
Authority
JP
Japan
Prior art keywords
circuit
switch
capacitor
ground
cut
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
JP9023480A
Other languages
Japanese (ja)
Other versions
JPS6228885B2 (en
Inventor
Yoshiaki Sano
Toshio Hanazawa
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP9023480A priority Critical patent/JPS5723306A/en
Publication of JPS5723306A publication Critical patent/JPS5723306A/en
Publication of JPS6228885B2 publication Critical patent/JPS6228885B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Amplifiers (AREA)

Abstract

PURPOSE: To suppress an increase of the number of external terminals, which is incidental to the fact that an IC chip is made to have a multifunction, by using properly one external terminal of an integrated circuit for amplifying a sound signal, in order to cut off a sound and also improve a ripple suppression ratio.
CONSTITUTION: An external terminal F is provided on a part of a suppressing circuit 10, a capacitor C3 is installed outside between said circuit and ground, and an electric power source VS is applied through a switch SW. Also, a sount cutting-off circuit 20 is added. In this way, when the switch SW is opened, the suppressing circuit 10 and the capacitor C3 operate as a suppressing circuit. On the other hand, when the switch SW is closed, voltage is applied to the base of a transistor Q9, it is turned on, an input part of an amplifier is short-circuited to ground, and a voice is cut off.
COPYRIGHT: (C)1982,JPO&Japio
JP9023480A 1980-07-02 1980-07-02 Amplifying circuit Granted JPS5723306A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9023480A JPS5723306A (en) 1980-07-02 1980-07-02 Amplifying circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9023480A JPS5723306A (en) 1980-07-02 1980-07-02 Amplifying circuit

Publications (2)

Publication Number Publication Date
JPS5723306A true JPS5723306A (en) 1982-02-06
JPS6228885B2 JPS6228885B2 (en) 1987-06-23

Family

ID=13992792

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9023480A Granted JPS5723306A (en) 1980-07-02 1980-07-02 Amplifying circuit

Country Status (1)

Country Link
JP (1) JPS5723306A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006174011A (en) * 2004-12-15 2006-06-29 Matsushita Electric Ind Co Ltd High-frequency integrated circuit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01106581U (en) * 1987-12-28 1989-07-18

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006174011A (en) * 2004-12-15 2006-06-29 Matsushita Electric Ind Co Ltd High-frequency integrated circuit

Also Published As

Publication number Publication date
JPS6228885B2 (en) 1987-06-23

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