Switching aid circuit for a logic circuit

Details Switching aid circuit for a logic circuit Switching aid circuit for a logic circuit

2005-04-19

2005-04-19

Chang, Daniel D. (Department: 2819)

Electronic digital logic circuitry

Interface

Current driving

C326S089000, C327S482000

Reexamination Certificate

active

06882180

ABSTRACT:
The invention concerns a switching circuit (20) adapted to generate a pulse when there occurs a rising edge of a signal applied on an input terminal (CTRL), comprising: a first NPN type bipolar transistor (TN2) whereof the transmitter is connected to the input terminal; a second transistor (TP2) whereof a control electrode is connected, through a first resistor (Re2), to the input terminal, the base of the first transistor being connected to a supply potential (VDD) by the second transistor in series with a second resistor (Rp2); and a third transistor (TN3) connecting an output terminal (22) of the switching circuit to a reference potential (GND) and whereof a control electrode is connected to the collector of the first transistor (TN2).

REFERENCES:
patent: 3588851 (1971-06-01), Jordan
patent: 3889137 (1975-06-01), Kay
patent: 4584490 (1986-04-01), West
International Search. Report from priority application No. PCT/FR01/03380, filed Oct. 30, 2001.
Patent Abstracts of Japan, vol. 007, No. 208 (E-198), Sep. 14, 1983 & JP 58 104532 A Jun. 22, 1998.
Patent Abstracts of Japan, vol. 013, No. 371 (E-807), Aug. 17, 1989 & JP 01 125108 A May 17, 1989.
Patent Abstracts of Japan, vol. 017, No. 245 (E-1365), May 17, 1993 & JP 04 369118 A Dec. 21, 1992.
Translation of International Preliminary Examination Report from PCT/FR01/03380, filed Oct. 30, 2001.

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