Wired-OR logic circuits each having a constant current source

Details Wired-OR logic circuits each having a constant current source Wired-OR logic circuits each having a constant current source

1993-03-25

1995-10-17

Westin, Edward P.

Electronic digital logic circuitry

Signal sensitivity or transmission integrity

326125, 326126, 326 90, 326 59, H03K 19082, H03K 1920, H03K 19086

Patent

active

054594111

ABSTRACT:
A wired-OR logic circuit has a plurality of logic circuit connected to a common signal line. Each of the plurality of logic circuits includes an output bipolar transistor for outputting a logical output signal to the common signal line, and a constant-current source forming an emitter-follower circuit together with tile output bipolar transistor and being turned-on or turned-off in response to an output select signal. Each of the logic circuits may include a base potential setting circuit which applies different base potentials to a base of the output bipolar transistor. The outputs of the same level from all the logic circuits can be outputted to an output terminal without being influenced by voltage drops caused by distributed wiring resistances inherently existing in the signal line.

REFERENCES:
patent: 4713560 (1987-12-01), Herndon
patent: 4999519 (1991-03-01), Kitsukawa et al.
patent: 5093587 (1992-03-01), Zbinden
patent: 5162677 (1992-11-01), Takahashi
patent: 5274277 (1993-12-01), Chan
patent: 5291075 (1994-03-01), Hollstein et al.
Patent Abstracts of Japan, vol. 5, No. 181 (E-83) (853) 20 Nov. 1981; & JP-A-56 107 641 (Nippon Denki K.K.) 26 Aug. 1981 *abstract*.
Patent Abstracts of Japan, vol. 12, No. 486 (E-695) 19 Dec. 1988; & JP-A-63 200 617 (Mitsubishi Electric Corp.) 18 Aug. 1988 *abstract*.
Patent Abstracts of Japan, vol. 8, No. 139 (E-253) 28 Jun. 1984 & JP-A-59 047 842 (Nippon Denki K.K.) 17 Mar. 1984 *abstract*.
Patent Abstracts of Japan, vol. 13, No. 407 (E-818) 8 Sep. 1989 & JP-A-01 147 915 (Hitachi Ltd.) 9 Jun. 1989 *abstract*.

Affiliated with

Also associated with

Rating

Wired-OR logic circuits each having a constant current source does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Wired-OR logic circuits each having a constant current source, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wired-OR logic circuits each having a constant current source will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-600144