JPS5733832A - Output circuit - Google Patents

Output circuit

Info

Publication number
JPS5733832A
JPS5733832A JP10869080A JP10869080A JPS5733832A JP S5733832 A JPS5733832 A JP S5733832A JP 10869080 A JP10869080 A JP 10869080A JP 10869080 A JP10869080 A JP 10869080A JP S5733832 A JPS5733832 A JP S5733832A
Authority
JP
Japan
Prior art keywords
current
collector
constant
pnptr13
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
Application number
JP10869080A
Other languages
Japanese (ja)
Inventor
Sadahiro Hayamizu
Susumu Komurasaki
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP10869080A priority Critical patent/JPS5733832A/en
Publication of JPS5733832A publication Critical patent/JPS5733832A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
    • H03K19/01—Modifications for accelerating switching
    • H03K19/013—Modifications for accelerating switching in bipolar transistor circuits

Abstract

PURPOSE:To realize a high output at a high speed, by connecting a PNP transistor in parallel to an NPN transistor for flowing out a current, which has been totem pole- connected, and making this PNP transistor execute a constant-current operation. CONSTITUTION:When the emitter area of an NPN transistor (TR)19 of the second constant-current circuit is made equal to the emitter area of an NPNTR20, the same current as a current flowing through a resistance 18 from an electric power supply terminal 2 flows to the collector of the NPNTR19. When the collector area of a PNPTR13 of the first constant-current circuit is made equal to the collector area of PNPTR16, the circuit is operated so that a current value which is equal to a collector current of the NPNTR19 is drawn out to the collector of the PNPTR13. Accordingly, it is operated as a normal constant-current circuit by compensating the shortage of hFE of the PNPTR13 and the PNPTR16. Therefore, not only high VDH is obtained at a high speed by an output terminal 4, but also there are no variations of a characteristic of an ''L'' level output current.
JP10869080A 1980-08-06 1980-08-06 Output circuit Pending JPS5733832A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10869080A JPS5733832A (en) 1980-08-06 1980-08-06 Output circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10869080A JPS5733832A (en) 1980-08-06 1980-08-06 Output circuit

Publications (1)

Publication Number Publication Date
JPS5733832A true JPS5733832A (en) 1982-02-24

Family

ID=14491172

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10869080A Pending JPS5733832A (en) 1980-08-06 1980-08-06 Output circuit

Country Status (1)

Country Link
JP (1) JPS5733832A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0167542A1 (en) * 1983-12-22 1986-01-15 Advanced Micro Devices, Inc. Transient active pull-down
JPS6284230U (en) * 1985-11-12 1987-05-29

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5258450A (en) * 1975-11-10 1977-05-13 Hitachi Ltd Transistor output circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5258450A (en) * 1975-11-10 1977-05-13 Hitachi Ltd Transistor output circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0167542A1 (en) * 1983-12-22 1986-01-15 Advanced Micro Devices, Inc. Transient active pull-down
JPS6284230U (en) * 1985-11-12 1987-05-29

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