JPS5525149A - Electric power circuit - Google Patents
Electric power circuitInfo
- Publication number
- JPS5525149A JPS5525149A JP9805178A JP9805178A JPS5525149A JP S5525149 A JPS5525149 A JP S5525149A JP 9805178 A JP9805178 A JP 9805178A JP 9805178 A JP9805178 A JP 9805178A JP S5525149 A JPS5525149 A JP S5525149A
- Authority
- JP
- Japan
- Prior art keywords
- fetq
- voltage
- constant
- type
- drain
- 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
- Control Of Electrical Variables (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
Abstract
PURPOSE: To generate an invariably-constant voltage by detecting threshold voltages of P-type and N-type FETs of a complementary semiconductor integrated circuit and by outputting a voltage corresponding to the reference voltage obtained by adding together both the threshold voltages.
CONSTITUTION: The drain and source of N-type FETQn1 are connected and constant current supply I is connected to the drain to allow the FET to operate invariably in a saturation region, thereby making the drain voltage invariably constant. In addition, the gate of N-type FETQn2 is connected to the gate of FETQn1 to make the gate voltage of FETQn2 constant, the drain-source voltage is set higher than a voltage obtained by subtracting the threshold voltage of FETQn2, and FETQn2 is made to operate in a saturation region, thereby making the drain current constant. Then, a current equal to the drain current of FETQn2 is flowed through P-type FETQp1 and FETQn3 and the sum of threshold voltages of those FETs Qp1 and Qn3 is applied as the reference voltage to the gate of N-type FETn4 to make the voltage of output terminal OUT constant.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9805178A JPS5525149A (en) | 1978-08-10 | 1978-08-10 | Electric power circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9805178A JPS5525149A (en) | 1978-08-10 | 1978-08-10 | Electric power circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5525149A true JPS5525149A (en) | 1980-02-22 |
Family
ID=14209411
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9805178A Pending JPS5525149A (en) | 1978-08-10 | 1978-08-10 | Electric power circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5525149A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6077212A (en) * | 1983-10-04 | 1985-05-01 | Nec Corp | Constant voltage regulated power supply circuit |
JPS61110217A (en) * | 1984-11-05 | 1986-05-28 | Nec Ic Microcomput Syst Ltd | Constant-voltage circuit |
JPH01302409A (en) * | 1988-05-30 | 1989-12-06 | Nec Ic Microcomput Syst Ltd | Power source circuit |
-
1978
- 1978-08-10 JP JP9805178A patent/JPS5525149A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6077212A (en) * | 1983-10-04 | 1985-05-01 | Nec Corp | Constant voltage regulated power supply circuit |
JPS61110217A (en) * | 1984-11-05 | 1986-05-28 | Nec Ic Microcomput Syst Ltd | Constant-voltage circuit |
JPH01302409A (en) * | 1988-05-30 | 1989-12-06 | Nec Ic Microcomput Syst Ltd | Power source circuit |
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