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. 20, 1993
Filed:
Mar. 02, 1992
Karl R Koblitz, Meylan, FR;
Thomson Consumer Electronics, S.A., Courbovoie, FR;
Abstract
The free-running frequency of a bus controlled horizontal oscillator is adjusted by programming of a first data signal that is coupled to a digital-to-analog converter. The programming causes the first data signal to be non-alterable. The programming is done during manufacturing of a wafer that includes the oscillator. A second data signal that is coupled from a microprocessor via a bus and via a second analog-to-digital converter to the oscillator can vary the oscillator free-running frequency to provide for tolerance compensation. The first data signal is immune against data errors. The second data signal is not immune against data errors, but can vary the oscillator frequency within only a relatively narrow range of values. Consequently, data errors are prevented from causing a significant change in the oscillator free-running frequency that might have occurred had both data signals been alterable.