JPS55147813A - Bias circuit - Google Patents
Bias circuitInfo
- Publication number
- JPS55147813A JPS55147813A JP5546479A JP5546479A JPS55147813A JP S55147813 A JPS55147813 A JP S55147813A JP 5546479 A JP5546479 A JP 5546479A JP 5546479 A JP5546479 A JP 5546479A JP S55147813 A JPS55147813 A JP S55147813A
- Authority
- JP
- Japan
- Prior art keywords
- resistance
- voltage
- diode
- transistor
- emitter current
- 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
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
- H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
- H03F1/0261—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the polarisation voltage or current, e.g. gliding Class A
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
PURPOSE:To stabilize the operation of transistor and reduce the bias current, by providing a choke coil, which has one end connected to the base of the amplifying transistor, a power source terminal which transmits and receives the emitter current, and a resistance which is connected to the other end of the coil above and by cascading a diode and another resistance and by connecting these cascaded them in parallel to the resistance above. CONSTITUTION:Though the forward voltage at point 5 which is divided by bias resistances R1 and R2 is applied to the base of transistor (TR) through choke coil L, the magnitude of this voltage can be set to a magnitude just before conduction of TR. Next, when a high-frequency voltage is input from terminal 6 to increase the voltage, TR becomes conductive, and next, the forward voltage between both ends of resistance R1 is cancelled and reduced by the emitter current, and the potential at point 5 becomes a negative potential, and from this time, diode X starts to be conductive, and the emitter current is flowed to the circuit of resistance R1 and the series circuit of resistance R2 and diode X divisionally.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5546479A JPS55147813A (en) | 1979-05-07 | 1979-05-07 | Bias circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5546479A JPS55147813A (en) | 1979-05-07 | 1979-05-07 | Bias circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55147813A true JPS55147813A (en) | 1980-11-18 |
Family
ID=12999322
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5546479A Pending JPS55147813A (en) | 1979-05-07 | 1979-05-07 | Bias circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55147813A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5268649A (en) * | 1992-08-03 | 1993-12-07 | Texas Instruments Incorporated | Bias circuit for bipolar transistors |
-
1979
- 1979-05-07 JP JP5546479A patent/JPS55147813A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5268649A (en) * | 1992-08-03 | 1993-12-07 | Texas Instruments Incorporated | Bias circuit for bipolar transistors |
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