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:
Apr. 16, 1985
Filed:
Jan. 28, 1983
Masaru Fukuta, Yokohama, JP;
Motorola, Inc., Schaumburg, IL (US);
Abstract
A high speed countdown counter (FIG. 7) capable of operation at up to 10 MHz is provided which comprises a number of stages each comprising a flip flop (134, 136; 144, 146; etc.), a preset data input (IN1, IN2, etc.), a carry input (N11, N10, etc.), a data output (N5, N4, etc.), and a carry output. Dynamic Depletion Mode (DDM) transistors (129, 139, etc.) are employed to reduce charging time at inter-stage nodes and thereby improve speed, while minimizing circuit size and power requirements. A look-ahead feature enables early detection of an 'all zero minus one' count and enables the presetting of data into the counter simultaneously with the generation of a 'carry out' signal from the counter. Various internal counter control signals are delayed by couplers driven by a two-phase non-overlapping clock, in order to allow for signal propagation time through the corresponding circuit elements.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile