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:
Mar. 28, 1989
Filed:
Dec. 16, 1987
Michael T Imel, Beaverton, OR (US);
Intel Corporation, Santa Clara, CA (US);
Abstract
An external timing source (40) provides an input waveform (44, 46) of signal voltage transitions which occur at a first frequency, which is twice the frequency desired by the internal clock. A divider circuit (48) divides the input waveform (44, 46) into a pair of intermediate waveforms (60, 62). The intermediate waveforms have signal-voltage transitions of opposing polarity which occur at a second frequency that is one-half of the first frequency. The input waveforms and the intermediate waveforms are supplied to a driver circuit (64). The driver circuit utilizes the intermediate waveforms occurring at the divided-down frequency and the input waveform occurring at the system clock frequency to produce a pair of final waveforms (66, 68). The final waveforms have signal voltage transistions of opposing polarity occurring at the divided-down frequency, but triggerred by and in synchronism with the input waveform occurring at the external clock frequency.