JPS6457748A - Transistor resistance circuit - Google Patents
Transistor resistance circuitInfo
- Publication number
- JPS6457748A JPS6457748A JP62214469A JP21446987A JPS6457748A JP S6457748 A JPS6457748 A JP S6457748A JP 62214469 A JP62214469 A JP 62214469A JP 21446987 A JP21446987 A JP 21446987A JP S6457748 A JPS6457748 A JP S6457748A
- Authority
- JP
- Japan
- Prior art keywords
- mosfet
- pull
- turned
- power supply
- circuit
- 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 obtain a pull-down or pull-up circuit capable of holding in appropriate impedance over a wide range of supply voltages, by adapting the circuit such that either or both of metal oxide field effect transistors (MOSFET) is turned ON depending on whether a supply voltage is high or low. CONSTITUTION:Source electrodes of N-type MOSFETs 11 and 12 are connected to a power supply terminal -Vss while drain electrodes thereof are connected to an input terminal 13. The gate electrode of the MOSFET 11 is connected to a power supply terminal+VDD while the gate electrode of the MOSFET 12 is connected to an output of an inverter circuit 19. If a conductance constant of the N-type MOSFET 12 is larger than that of the MOSFET 11, the MOSFET 11 is turned ON and the MOSFET 12 is turned OFF when a power supply voltage is high. Accordingly, the power supplying capability of the MOSFET 11 fixes a pull-down resistance value. When the power supply voltage is lowered both the MOSFETs 11 and 12 are turned ON. Thus, an impedance value appropriate for a pull-down circuit can be held over a wide range of supply voltages.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62214469A JPS6457748A (en) | 1987-08-28 | 1987-08-28 | Transistor resistance circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62214469A JPS6457748A (en) | 1987-08-28 | 1987-08-28 | Transistor resistance circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6457748A true JPS6457748A (en) | 1989-03-06 |
Family
ID=16656240
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62214469A Pending JPS6457748A (en) | 1987-08-28 | 1987-08-28 | Transistor resistance circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6457748A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02234514A (en) * | 1989-03-08 | 1990-09-17 | Oki Electric Ind Co Ltd | Cmos output buffer circuit |
-
1987
- 1987-08-28 JP JP62214469A patent/JPS6457748A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02234514A (en) * | 1989-03-08 | 1990-09-17 | Oki Electric Ind Co Ltd | Cmos output buffer circuit |
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