JPS54152936A - Output buffer circuit - Google Patents

Output buffer circuit

Info

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
Application number
JP6107378A
Other languages
Japanese (ja)
Other versions
JPS6057779B2 (en
Inventor
Tatsuaki Ueno
Shiro Baba
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP53061073A priority Critical patent/JPS6057779B2/en
Publication of JPS54152936A publication Critical patent/JPS54152936A/en
Publication of JPS6057779B2 publication Critical patent/JPS6057779B2/en
Expired legal-status Critical Current

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
JP53061073A 1978-05-24 1978-05-24 output buffer circuit Expired JPS6057779B2 (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (4)

* Cited by examiner, † Cited by third party
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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