JPS5723306A - Amplifying circuit - Google Patents
Amplifying circuitInfo
- 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
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
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01106581U (en) * | 1987-12-28 | 1989-07-18 |
-
1980
- 1980-07-02 JP JP9023480A patent/JPS5723306A/en active Granted
Cited By (1)
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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