JPS54152936A - Output buffer circuit - Google Patents
Output buffer circuitInfo
- Publication number
- JPS54152936A JPS54152936A JP6107378A JP6107378A JPS54152936A JP S54152936 A JPS54152936 A JP S54152936A JP 6107378 A JP6107378 A JP 6107378A JP 6107378 A JP6107378 A JP 6107378A JP S54152936 A JPS54152936 A JP S54152936A
- Authority
- JP
- Japan
- Prior art keywords
- output
- signal
- level
- current
- 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.)
- Granted
Links
Abstract
PURPOSE: To obtain a fast output signal by composing an output buffer circuit of a push-pull circuit which becomes high in impedance at non-output timing and a MISFET which supplies a current at the time of a power-side level output at output timing.
CONSTITUTION: When output timing signal (ϕ1) is at level "1", NOR gates NR1 and NR2 of output buffer circuit 1 turn OFF push-pull output circuit MISFETs Q1 and Q2 while generating no outputs, so as to make input-output terminal P1 high in impedance. When signal (ϕc) is at level "0", FETs Q1 and Q2 are turned ON according to levels "1" and "0" of information D to be outputted, thereby outputting "1" or "0" to terminal P1. Then, MISFETQ3 supplies the output current of output buffer 4 at the opposite side when signal (ϕc) is "1" and operates in the same way as FETQ1 according to information D when the signal is "0", so as to support the supply of a "1"-level output current, thereby flowing a current needed for acceleration when a "1"-level output is generated. Consequently, acceleration can be realized by the minimum FET size even when the input current is prescribed such as a TTL circuit.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53061073A JPS6057779B2 (en) | 1978-05-24 | 1978-05-24 | output buffer circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53061073A JPS6057779B2 (en) | 1978-05-24 | 1978-05-24 | output buffer circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54152936A true JPS54152936A (en) | 1979-12-01 |
JPS6057779B2 JPS6057779B2 (en) | 1985-12-17 |
Family
ID=13160588
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53061073A Expired JPS6057779B2 (en) | 1978-05-24 | 1978-05-24 | output buffer circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6057779B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55959A (en) * | 1978-06-19 | 1980-01-07 | Matsushita Electric Ind Co Ltd | Input-output circuit of microcomputer |
JPS6278915A (en) * | 1985-10-02 | 1987-04-11 | Mitsubishi Electric Corp | Semiconductor integrated circuit device |
JPS62133817A (en) * | 1985-12-05 | 1987-06-17 | Rohm Co Ltd | Input and output common use circuit |
-
1978
- 1978-05-24 JP JP53061073A patent/JPS6057779B2/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55959A (en) * | 1978-06-19 | 1980-01-07 | Matsushita Electric Ind Co Ltd | Input-output circuit of microcomputer |
JPS5750292B2 (en) * | 1978-06-19 | 1982-10-26 | ||
JPS6278915A (en) * | 1985-10-02 | 1987-04-11 | Mitsubishi Electric Corp | Semiconductor integrated circuit device |
JPS62133817A (en) * | 1985-12-05 | 1987-06-17 | Rohm Co Ltd | Input and output common use circuit |
Also Published As
Publication number | Publication date |
---|---|
JPS6057779B2 (en) | 1985-12-17 |
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