JPS5616223A - Interface circuit - Google Patents
Interface circuitInfo
- Publication number
- JPS5616223A JPS5616223A JP9159779A JP9159779A JPS5616223A JP S5616223 A JPS5616223 A JP S5616223A JP 9159779 A JP9159779 A JP 9159779A JP 9159779 A JP9159779 A JP 9159779A JP S5616223 A JPS5616223 A JP S5616223A
- Authority
- JP
- Japan
- Prior art keywords
- level
- trailing
- leading
- circuit
- cpu12
- 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
- Logic Circuits (AREA)
- Dc Digital Transmission (AREA)
- Power Sources (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
PURPOSE: To realize the information system of high quality, by avoiding the production of unnecessary pulse noise and the period of unstable state at leading and trailing of DC level, at the connection between CPU and external circuits.
CONSTITUTION: The normally opened relay contact 32 is placed in series connection with the signal line for CPU12 and external circuit 13. This contact 32 is switched with the relay driving circuit 33, and this circuit 33 has the transistor TR34 and the relay coil 35. Further, at the collector side of TR34, DC level V1 is given and at the base side of TR34, the DC level V2 is fed, the leading of the level V2 is delayed for a given time than the leading of the level V1, and the trailing of the level V2 is ahead the trailing of the level V1. Further, the level V1 can be the level of the supply power 15 to the logic circuit of CPU12. Thus, at the leading and trailing of the DC level, the production of unstable operation period and unnecessary pulse noise is avoided to realize the information system of high quality.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9159779A JPS5616223A (en) | 1979-07-20 | 1979-07-20 | Interface circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9159779A JPS5616223A (en) | 1979-07-20 | 1979-07-20 | Interface circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5616223A true JPS5616223A (en) | 1981-02-17 |
Family
ID=14030956
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9159779A Pending JPS5616223A (en) | 1979-07-20 | 1979-07-20 | Interface circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5616223A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57156930U (en) * | 1981-03-27 | 1982-10-02 | ||
JPS5827218A (en) * | 1981-08-10 | 1983-02-17 | Nec Corp | Generating circuit of power supply decision signal for logical unit |
JPS5954354A (en) * | 1982-09-22 | 1984-03-29 | Fujitsu Ltd | Signal transmitting method |
CN102098038A (en) * | 2010-11-23 | 2011-06-15 | 中国人民解放军63961部队 | Signal conditioning card |
-
1979
- 1979-07-20 JP JP9159779A patent/JPS5616223A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57156930U (en) * | 1981-03-27 | 1982-10-02 | ||
JPS5827218A (en) * | 1981-08-10 | 1983-02-17 | Nec Corp | Generating circuit of power supply decision signal for logical unit |
JPH0223886B2 (en) * | 1981-08-10 | 1990-05-25 | Nippon Electric Co | |
JPS5954354A (en) * | 1982-09-22 | 1984-03-29 | Fujitsu Ltd | Signal transmitting method |
CN102098038A (en) * | 2010-11-23 | 2011-06-15 | 中国人民解放军63961部队 | Signal conditioning card |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5363851A (en) | Push-pull pulse amplifier circuit | |
JPS5783930A (en) | Buffer circuit | |
JPS5616223A (en) | Interface circuit | |
JPS57150227A (en) | Buffer circuit | |
JPS5367826A (en) | Boosting circuit | |
JPS5359330A (en) | Mis-output preventing system | |
JPS57148419A (en) | Supplying circuit for clock signal | |
JPS5288008A (en) | Magnetic recording and reproduction apparatus | |
JPS51147980A (en) | Semiconductor integrated circuit | |
JPS5320522A (en) | Pulse width modulated circuit for d.c. motor control circuit | |
JPS53126284A (en) | Semiconductor integrated circuit | |
JPS5266368A (en) | Semiconductor logic circuit | |
JPS5223314A (en) | Tape recorder drive control circuit | |
JPS5532206A (en) | Memory unit | |
JPS5567817A (en) | Latch circuit | |
JPS51140545A (en) | Driving circuit | |
JPS6454756A (en) | Semiconductor memory | |
JPS5381022A (en) | Magnetic bubble driver circuit | |
JPS5288009A (en) | Magnetic recording and reproduction apparatus | |
JPS5249407A (en) | Reversibible pluse motor for electronic watch | |
JPS522499A (en) | Recording medium feed mechanism capable of speed switching | |
JPS54102460A (en) | Recording paper transfer apparatus | |
JPS5268424A (en) | Low noise driving for copying machine | |
JPS5210707A (en) | Magnetic tape drive unit | |
JPS52150987A (en) | Production of ill type semiconductor device |