JPS6415821A - 3-state control system - Google Patents
3-state control systemInfo
- Publication number
- JPS6415821A JPS6415821A JP62172217A JP17221787A JPS6415821A JP S6415821 A JPS6415821 A JP S6415821A JP 62172217 A JP62172217 A JP 62172217A JP 17221787 A JP17221787 A JP 17221787A JP S6415821 A JPS6415821 A JP S6415821A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- terminal
- state control
- constitution
- inverted logic
- 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
- Bus Control (AREA)
- Logic Circuits (AREA)
Abstract
PURPOSE:To ensure the stable 3-state control with simple circuit constitution by setting a non-inverted logic circuit between two inverted logic circuits and setting a high impedance after an output is set at a high level. CONSTITUTION:Both inverted circuits 1 and 2 have the same circuit constitution. A signal B is supplied to the circuit 2 and the output terminal 2-4 of the circuit 2 is set at '0'. Under such conditions, the 3-state control signal A of the circuit 1 is set at '1' and therefore the output terminal 1-4 of the circuit 1 is set at '0'. Then a current flows to a diode D3. As a result, the terminal 2-4 is set at '1'. At the same time, '0' of the terminal 1-4 is supplied to a non-inverted logic circuit 3 and the terminal 3-4 of the circuit 3 is set at '1' to cut off the current flowing to a diode D6. Thus the terminal 2-4 has a high impedance.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62172217A JPS6415821A (en) | 1987-07-09 | 1987-07-09 | 3-state control system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62172217A JPS6415821A (en) | 1987-07-09 | 1987-07-09 | 3-state control system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6415821A true JPS6415821A (en) | 1989-01-19 |
Family
ID=15937765
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62172217A Pending JPS6415821A (en) | 1987-07-09 | 1987-07-09 | 3-state control system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6415821A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5179371A (en) * | 1987-08-13 | 1993-01-12 | Seiko Epson Corporation | Liquid crystal display device for reducing unevenness of display |
US5202676A (en) * | 1988-08-15 | 1993-04-13 | Seiko Epson Corporation | Circuit for driving a liquid crystal display device and method for driving thereof |
-
1987
- 1987-07-09 JP JP62172217A patent/JPS6415821A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5179371A (en) * | 1987-08-13 | 1993-01-12 | Seiko Epson Corporation | Liquid crystal display device for reducing unevenness of display |
US5202676A (en) * | 1988-08-15 | 1993-04-13 | Seiko Epson Corporation | Circuit for driving a liquid crystal display device and method for driving thereof |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS6429018A (en) | Input protection device for semiconductor circuit device | |
JPS5573994A (en) | Three-state output circuit | |
JPS6415821A (en) | 3-state control system | |
JPS5750139A (en) | Hysteresis circuit | |
JPS57162838A (en) | Emitter coupling type logical circuit | |
JPS5735422A (en) | Semiconductor circuit | |
JPS56119530A (en) | Semiconductor integrated circuit | |
JPS5535574A (en) | Logic device | |
JPS56107641A (en) | Semiconductor circuit equipment | |
JPS5779457A (en) | Voltage comparing circuit | |
JPS57101430A (en) | Termination resistor chip provided with tie-up means | |
JPS56140686A (en) | Pockels' cell driving circuit | |
JPS6435496A (en) | High sound volume bell circuit | |
JPS5768929A (en) | Flip-flop circuit | |
JPS5733832A (en) | Output circuit | |
JPS6412708A (en) | Bi-directional signal selection circuit | |
JPS5558813A (en) | Input circuit for selection signal | |
JPS566537A (en) | Input circuit | |
JPS57154938A (en) | Input recognizing circuit | |
JPS6439119A (en) | Logical operation circuit | |
JPS55151806A (en) | Signal level control circuit | |
JPS57162833A (en) | Pulse generator | |
JPS5791057A (en) | Connecting device for communication line | |
JPS6410726A (en) | Bus potential hold circuit | |
JPS5541020A (en) | Logic output circuit |