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:
Feb. 28, 1995
Filed:
Jun. 23, 1993
Applicant:
Inventor:
Craig M Davis, Puyallup, WA (US);
Assignee:
National Semiconductor Corporation, Santa Clara, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ; H03L / ;
U.S. Cl.
CPC ...
331 / ; 331 57 ; 331 74 ; 327116 ; 327141 ; 327175 ;
Abstract
Generation of clock waveforms which have a frequency, phase offset, and duty cycle that is relative to a periodic reference signal. The outputs of a voltage controlled ring oscillator are directly applied to drive the inputs of a programmable AND, fixed OR array (PAL) to produce pulses of varied and phase offset and duty cycle. The phase offset has a resolution of one nanosecond. Additionally, the pulses generated can be ORed together within the to produce clock waveforms that are multiples of the input frequency.