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:
Aug. 15, 2000
Filed:
Feb. 25, 1999
Arnoldus J Boudewijns, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
An oscillator circuit contains a switching circuit which periodically charges and discharges a capacitive node. The capacitive node is coupled to the input of the switching circuit via a loop circuit, so that signal transitions at the capacitive node travel through the loop circuit and cause new transitions. The oscillator contains a power supply current source and a mode breaker circuit which function to stabilize the oscillating frequency and to suppress spurious modes of operation, respectively. The mode breaker circuit contains a conduction path which is used to frustrate charging of the capacitive nodes in certain spurious signal configurations. To prevent the mode breaking function from interference between the stabilizing function, the mode breaker circuit is arranged so that it blocks the conduction path during the critical time-intervals when the loop operates in a desired mode.