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:
Sep. 01, 1998
Filed:
Mar. 07, 1996
James R Kuo, Cupertino, CA (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
A high speed differential data latch includes identical master and slave flip-flops. The master flip-flop is driven by a differential input data signal while both flip-flops are driven by a shared differential clock signal. Each flip-flop includes: one differential amplifier for sequentially latching the differential input data signal to provide a differential output data signal; a second differential amplifier for generating two switched supply currents from the clock signal for powering the differential data amplifier; and a third differential amplifier cross-coupled to the differential data amplifier for providing positive feedback thereto for enhancing the latching speed. The differential output data signal follows the differential input data signal during one of the differential clock states and remains latched during the other differential clock state.