JPS5776906A - Signl switching and aplifying circuit - Google Patents
Signl switching and aplifying circuitInfo
- Publication number
- JPS5776906A JPS5776906A JP55151359A JP15135980A JPS5776906A JP S5776906 A JPS5776906 A JP S5776906A JP 55151359 A JP55151359 A JP 55151359A JP 15135980 A JP15135980 A JP 15135980A JP S5776906 A JPS5776906 A JP S5776906A
- Authority
- JP
- Japan
- Prior art keywords
- switching
- resistor
- capacitor
- signal
- trq
- 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
Landscapes
- Electronic Switches (AREA)
- Amplifiers (AREA)
Abstract
PURPOSE: To achieve equivalent AC coupling and to suppress the increase in the number of pins, by applying a plurality of input signals to the base of a transistor (TR) through switching, and providing a series circuit of constant current source, resistor and capacitor between the emitter and ground.
CONSTITUTION: A plurality of input signals 11, 12 with different DC operating level are switched with a switching signal 14 at a switching stage 13 and applied to the base of a TRQ of an amplifying stage 15. A series circuit of a resistor R and a capacitor C and constant current source I is connected between the emitter of the TRQ and ground, and an output VO is obtained with a resistor RL connected to a power supply VCC. In this case, a resistance value R of the resistor R and a capacitance C of a capacitor C satisfy the relation of fSW≪1/2πCR≪fsignal, where fSW is the frequency of the switching signal 14 and fsignal is the frequency of unput signals 11, 12. Thus, equivalent AC coupling is substantially achieved, the flucutation in the DC operating point of input is not transmitted to the poststage and the transient effect can be prevented.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55151359A JPS5776906A (en) | 1980-10-30 | 1980-10-30 | Signl switching and aplifying circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55151359A JPS5776906A (en) | 1980-10-30 | 1980-10-30 | Signl switching and aplifying circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5776906A true JPS5776906A (en) | 1982-05-14 |
Family
ID=15516813
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55151359A Pending JPS5776906A (en) | 1980-10-30 | 1980-10-30 | Signl switching and aplifying circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5776906A (en) |
-
1980
- 1980-10-30 JP JP55151359A patent/JPS5776906A/en active Pending
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5516539A (en) | Level shifter circuit | |
JPS5363851A (en) | Push-pull pulse amplifier circuit | |
JPS5742208A (en) | Amplifying circuit for direct coupling circuit | |
JPS5718109A (en) | Sound volume controlling circuit | |
JPS55132112A (en) | Power amplifying circuit | |
JPS55136708A (en) | Voltage current conversion circuit | |
JPS5737908A (en) | Output amplifying circuit | |
JPS57204609A (en) | Amplifier | |
JPS54102956A (en) | Pulse amplifier circuit | |
DE3260920D1 (en) | Sliding class a broadband linear amplifier with low power consumption, and circuit comprising at least one such amplifier | |
JPS5776906A (en) | Signl switching and aplifying circuit | |
JPS5657313A (en) | Balanced modulator | |
JPS555552A (en) | Dc reproducing circuit | |
JPS5688513A (en) | Constant-current driving circuit | |
JPS55117971A (en) | Level indication circuit | |
JPS5530743A (en) | Isolation type digital signal input circuit | |
JPS5544238A (en) | Signal switching circuit | |
JPS6467015A (en) | Filter circuit | |
JPS57107618A (en) | Power amplifier | |
JPS54154066A (en) | Constant-voltage power supply circuit | |
JPS5445770A (en) | Stabilized power supply | |
JPS54162443A (en) | Low frequency power amplifier | |
JPS5568729A (en) | Input circuit with input level decision | |
JPS57103414A (en) | Current source circuit | |
JPS56168407A (en) | Amplifier |