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:
Jul. 08, 2003
Filed:
Oct. 03, 2001
Gerd Rombach, Freising, DE;
Hermann Seibold, Amper, DE;
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A clock generator including a PLL circuit serves to generate an output frequency cycled in a predefined range and containing a desired clock frequency. The PLL circuit contains a voltage-controlled oscillator ( ), the oscillating frequency of which is adjustable by means of an analog control voltage to the desired clock frequency in a fixed relationship to a reference frequency applied to the PLL circuit. The clock generator contains a second voltage-controlled oscillator ( ), the oscillating frequency of which can be cycled in the predefined range. The second oscillator ( ) is configured so that its oscillating frequency can be varied by means of a digital incrementally variable control signal in the predefined range. By varying the output frequency of the clock generator a spreading of its output frequency spectrum is attainable, resulting in a reduction in high-frequency interference by the signal generated by the clock.