JPS5518106A - Switch circuit - Google Patents
Switch circuitInfo
- 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
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
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06254347A (en) * | 1993-03-09 | 1994-09-13 | Nippon Shokubai Co Ltd | Deodorizing method and device |
-
1978
- 1978-07-25 JP JP9000278A patent/JPS5518106A/en active Pending
Cited By (1)
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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