JPH0271612A - Semiconductor logic circuit with improved active current source - Google Patents

Semiconductor logic circuit with improved active current source

Info

Publication number
JPH0271612A
JPH0271612A JP63223742A JP22374288A JPH0271612A JP H0271612 A JPH0271612 A JP H0271612A JP 63223742 A JP63223742 A JP 63223742A JP 22374288 A JP22374288 A JP 22374288A JP H0271612 A JPH0271612 A JP H0271612A
Authority
JP
Japan
Prior art keywords
turned
signal
current source
logic circuit
current
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
JP63223742A
Other languages
Japanese (ja)
Inventor
Nobuyuki Hirakata
Original Assignee
Sumitomo Electric Ind 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 Sumitomo Electric Ind Ltd filed Critical Sumitomo Electric Ind Ltd
Priority to JP63223742A priority Critical patent/JPH0271612A/en
Publication of JPH0271612A publication Critical patent/JPH0271612A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H03BASIC ELECTRONIC CIRCUITRY
    • H03KPULSE TECHNIQUE
    • H03K19/00Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
    • H03K19/01Modifications for accelerating switching
    • H03K19/017Modifications for accelerating switching in field-effect transistor circuits
    • H03K19/01707Modifications for accelerating switching in field-effect transistor circuits in asynchronous circuits
    • H03K19/01721Modifications for accelerating switching in field-effect transistor circuits in asynchronous circuits by means of a pull-up or down element
    • HELECTRICITY
    • H03BASIC ELECTRONIC CIRCUITRY
    • H03KPULSE TECHNIQUE
    • H03K19/00Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
    • H03K19/02Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components
    • H03K19/08Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using semiconductor devices
    • H03K19/094Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using semiconductor devices using field-effect transistors
    • H03K19/09432Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using semiconductor devices using field-effect transistors with coupled sources or source coupled logic

Abstract

PURPOSE:To surely perform a push-pull operation, to heighten driving capacity, and to realize a stable logic operation by keeping the sum of the currents of a pair of current sources constant and varying the distribution ratio of the current. CONSTITUTION:When a signal of (H) is inputted to input IN1 and a signal of (L) to input IN2 after inverting their phases mutually, a transistor Q1 is turned on, a Q2 is turned off. Thereby, a Q4 is turned off, and a Q5 is turned on, and the gate of a Q7 is set at (L) during charging a capacitor C2, and the Q7 is turned off, and the source potential of the Q5 is shifted by the potential drop of a Schottky barrier diode comprising a level shift element 22, then, a signal of (H) is outputted to output OUT2. Also, a Q6 is turned on, then, out OUT1 goes to (L). As a result, it is possible to vary the distribution ratio of each current that flows on the Q6 and the Q7 by the push-pull operation as keeping the sum of the currents that flow on the Q6 and Q7 constant.
JP63223742A 1988-09-07 1988-09-07 Semiconductor logic circuit with improved active current source Pending JPH0271612A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63223742A JPH0271612A (en) 1988-09-07 1988-09-07 Semiconductor logic circuit with improved active current source

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63223742A JPH0271612A (en) 1988-09-07 1988-09-07 Semiconductor logic circuit with improved active current source

Publications (1)

Publication Number Publication Date
JPH0271612A true JPH0271612A (en) 1990-03-12

Family

ID=16802985

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63223742A Pending JPH0271612A (en) 1988-09-07 1988-09-07 Semiconductor logic circuit with improved active current source

Country Status (1)

Country Link
JP (1) JPH0271612A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001003300A1 (en) * 1999-07-01 2001-01-11 Vitesse Semiconductor Corporation Method and circuitry for high speed buffering of clocks signals
US6633191B2 (en) 2001-02-05 2003-10-14 Vitesse Semiconductor Corporation Clock buffer with DC offset suppression

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001003300A1 (en) * 1999-07-01 2001-01-11 Vitesse Semiconductor Corporation Method and circuitry for high speed buffering of clocks signals
US6366140B1 (en) 1999-07-01 2002-04-02 Vitesse Semiconductor Corporation High bandwidth clock buffer
US6462590B2 (en) 1999-07-01 2002-10-08 Vitesse Semiconductor Corporation High bandwidth clock buffer
US6633191B2 (en) 2001-02-05 2003-10-14 Vitesse Semiconductor Corporation Clock buffer with DC offset suppression

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