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. 24, 1996
Filed:
Sep. 15, 1995
Applicant:
Inventors:
Assignee:
International Microcircuits, Inc., Milpitas, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H03B / ; H03K / ; H03L / ;
U.S. Cl.
CPC ...
331 97 ; 327175 ; 327171 ; 331 34 ; 331 45 ; 331 60 ; 331 75 ; 3311 / ;
Abstract
Five CMOS inverters are connected in a series ring to form an oscillator. Current to the inverters is controlled to establish gate delays of the inverters and thereby determine a frequency of oscillation of the oscillator. The oscillator is included in a phase locked loop where the gate delay of the inverters is selected by selecting the value of a frequency divider of the phase locked loop. The selected delay is used to form a train of pulses with a desired duty cycle.