The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 03, 1977
Filed:
May. 12, 1975
Borys Zuk, Somerville, NJ (US);
RCA Corporation, New York, NY (US);
Abstract
A flip-flop comprising two, cross-coupled, transistors each having one end of its main conduction path connected to a common current source, and in which switching between states is accomplished by the application of voltages coupled through voltage dropping resistors connected to the other ends of the main conduction paths of the two transistors. The circuitry for applying the switching voltages includes an emitter-coupled logic (ECL) gate comprising a differential amplifier stage containing a pulse forming network for producing a sampling pulse at one output and a clocking signal at another output. The sampling pulse is 'AND'ed' with input data signals to set the flip-flop to one binary condition and the clocking signal is used to reset the flip-flop to the other binary condition. Circuitry for sensing the state of the flip-flop includes a differential stage whose inputs are coupled to the control electrodes of the transistors of the flip-flop.