Electronic digital logic circuitry – Interface – Current driving
Patent
1994-07-13
1996-02-27
Hudspeth, David R.
Electronic digital logic circuitry
Interface
Current driving
326 21, 326 30, 327205, H03K 32897
Patent
active
054951860
ABSTRACT:
A differential type MOS transmission circuit includes a signal driving circuit and a signal receiving circuit to realize high speed transmission for a short distance transmission between different LSIs, etc. A pair of transmission lines between the signal driving circuit and the signal receiving circuit are driven by a pair of drivers in the signal driving circuit so as to take either one of three states, i.e. one state where both of the lines are in a precharged states and two states where either one of the lines is in a discharged state. A signal driving circuit includes signal generating circuits generating variations in control signals varying pulse-like in response to rise and fall of an input signal to thereby obtain the discharge state. The signal receiving circuit generates an output signal depending on the state of the transmission lines and is constructed of a Schmitt trigger circuit with a hysteresis characteristic, for which an input threshold voltage for output logical values has a level smaller than a potential difference between the precharged level and the discharged level.
REFERENCES:
patent: 4719369 (1988-01-01), Asano et al.
patent: 4833347 (1989-05-01), Rabe
patent: 5111080 (1992-05-01), Mizukami et al.
patent: 5175445 (1992-12-01), Kinugasa et al.
patent: 5319262 (1994-06-01), Cederbaum et al.
Kanazawa, Nobuaki, et al. "ATM CMOS LSI--CMOS High Speed Interface LSI for ATM Cell Transmission," Conference No. ICD92-27, Jun. 1992, Kumamoto Meeting 1992 of Study Group on Integrated Circuit, Electronic Information Communication Society, pp. 15-20. (This document is provided in Japanese; English translation unavailable to applicants' attorney.).
Ito Kunihiro
Kanazawa Nobuaki
Mizukami Masao
Hitachi , Ltd.
Hitachi Communication Systems, Inc.
Hudspeth David R.
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