JPS57140009A - Bias circuit for field effect transistor - Google Patents
Bias circuit for field effect transistorInfo
- Publication number
- JPS57140009A JPS57140009A JP56025736A JP2573681A JPS57140009A JP S57140009 A JPS57140009 A JP S57140009A JP 56025736 A JP56025736 A JP 56025736A JP 2573681 A JP2573681 A JP 2573681A JP S57140009 A JPS57140009 A JP S57140009A
- Authority
- JP
- Japan
- Prior art keywords
- power
- gate
- resistor
- power supply
- fet1
- 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 achieve stable operation against parameter fluctuation of an FET and high efficiency, by connecting a low voltage power supply at a split point of a split resistor inserted between the source and gate of the FET and a high impedance high voltage power supply to the gate.
CONSTITUTION: Split resistors 2' and 3 are inserted between the source and gate of an FET1, a split point is connected to a low voltage 4' and a high impedance power supply 5 is connected to the gate of the FET1. In this automatic bias circuit, when biasing is made, the power required for biasing the FET1 requires the required minimum power plus a power consumed in the resistor 2' to obtain a voltage VGS between the gate and source. The power efficiency can be increased by supplying a potential required for this VGS from the other high impedance power supply 5 without consumed power more than required power in the resistor 2'. Since the increase in the current IS flowing to the resistor 2' is fed back to the VGS through the resistor 2' through the connection, stable operation can be made against parameter fluctuation.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56025736A JPS57140009A (en) | 1981-02-24 | 1981-02-24 | Bias circuit for field effect transistor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56025736A JPS57140009A (en) | 1981-02-24 | 1981-02-24 | Bias circuit for field effect transistor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57140009A true JPS57140009A (en) | 1982-08-30 |
Family
ID=12174096
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56025736A Pending JPS57140009A (en) | 1981-02-24 | 1981-02-24 | Bias circuit for field effect transistor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57140009A (en) |
-
1981
- 1981-02-24 JP JP56025736A patent/JPS57140009A/en active Pending
Similar Documents
Publication | Publication Date | Title |
---|---|---|
TW357477B (en) | A low-drop-out voltage regulator with PMOS pass element | |
JPS57206113A (en) | Amplifier for limiter | |
JPS5742208A (en) | Amplifying circuit for direct coupling circuit | |
JPS57140009A (en) | Bias circuit for field effect transistor | |
ATE32814T1 (en) | FEEDBACK CURRENT FEED AMPLIFIER CIRCUIT. | |
JPS5643808A (en) | Signal converting circuit | |
JPS555552A (en) | Dc reproducing circuit | |
JPS57155809A (en) | Transistor amplifier | |
JPS551147A (en) | Stabilized luminous source | |
JPS561767A (en) | Gate circuit for thyristor | |
JPS5776916A (en) | Output circuit | |
JPS5544266A (en) | Rectifying circuit | |
JPS5735422A (en) | Semiconductor circuit | |
JPS5490549A (en) | Dc stabilized power source device | |
JPS55117918A (en) | Exciting power supply circuit of electromagnetic flow meter | |
JPS57196607A (en) | Amplifier | |
JPS54154066A (en) | Constant-voltage power supply circuit | |
JPS56168246A (en) | Power supply circuit | |
JPS6415821A (en) | 3-state control system | |
JPS647719A (en) | Transmitting power control circuit | |
JPS5531296A (en) | High voltage generator in monolithic ic | |
JPS567116A (en) | Serial control type constant voltage power unit | |
JPS56131227A (en) | Negative feedback circuit for reference voltage of da converter | |
JPS57201919A (en) | Two electric power source supplying circuit | |
JPS5715506A (en) | Power supply circuit for class a power amplifier |