JPH02246618A - Logic circuit - Google Patents

Logic circuit

Info

Publication number
JPH02246618A
JPH02246618A JP6831989A JP6831989A JPH02246618A JP H02246618 A JPH02246618 A JP H02246618A JP 6831989 A JP6831989 A JP 6831989A JP 6831989 A JP6831989 A JP 6831989A JP H02246618 A JPH02246618 A JP H02246618A
Authority
JP
Japan
Prior art keywords
rhet
input
current
flows
mirror 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
JP6831989A
Other languages
Japanese (ja)
Inventor
Motomu Takatsu
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP6831989A priority Critical patent/JPH02246618A/en
Publication of JPH02246618A publication Critical patent/JPH02246618A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To constitute a NOR gate whose input and output level is matched even when a saturated voltage between the collector and the emitter is high and a component whose input and output characteristic is complicated is employed by using a current mirror circuit.
CONSTITUTION: A NOR gate 1 consists of two RHET 2, 3, input resistors R1, R8 and a load resistor R3. Bases and emitters of the two RHET 2, 3 are connected in common and the collector of the RHET 2 connects to the base. The two RHET 2, 3 constitute a so-called current mirror circuit. When both input signals A, B are at 'L', the current I1 scarcely flows. Moreover, when one input is at 'H' level and both the input signals A, B at 'H', the current I1 flows and the current I8 flows to a load resistor R3 by the nature of the current mirror circuit.
COPYRIGHT: (C)1990,JPO&Japio
JP6831989A 1989-03-20 1989-03-20 Logic circuit Pending JPH02246618A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6831989A JPH02246618A (en) 1989-03-20 1989-03-20 Logic circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6831989A JPH02246618A (en) 1989-03-20 1989-03-20 Logic circuit

Publications (1)

Publication Number Publication Date
JPH02246618A true JPH02246618A (en) 1990-10-02

Family

ID=13370382

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6831989A Pending JPH02246618A (en) 1989-03-20 1989-03-20 Logic circuit

Country Status (1)

Country Link
JP (1) JPH02246618A (en)

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