Title: TTL circuit

Abstract: A logic gate circuit includes parallel drive of an output transistor and an inverter transistor by an input transistor. The inverter transistor then drives an active pull-up transistor which improves switching speed. The parallel drive of the invention allows the use of the active pull-up transistor without requiring a change in circuit voltage levels.

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Inventors: Evans, William Joshua (Berkeley Heights, NJ, US)

Application Number: 508081
Filing Date: 1974-09-23
Publication_date: 1976-01-20
Assignee: Bell Telephone Laboratories, Incorporated (Murray Hill, NJ)
Primary Class(es): 326/128 326/19, 326/22
Other Classes:
US Patent Ref:

3522444	Aug, 1970	Lourie	307/299.
3571616	Mar, 1971	Andrews	307/299.
3867644	Feb, 1975	Cline	307/317.

Other Refs:
Primary Examiner: Miller, Jr., Stanley D.
Assistant Examiner: Davies, B. P.
Attorney: Abolins; P., Canepa; L. C.