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:
Jan. 09, 1990
Filed:
Jun. 02, 1988
Arnoldus J Boudewijns, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
An oscillator circuit comprising an oscillator with a CMOS gate. A suitably proportioned CMOS gate consumes power only when its gate output, assumed to be capacitively loaded, is charged. Therefore, a relation can be deduced between an oscillation frequency of the oscillator and a ratio of the voltage across the CMOS gate and the conducted current. The actual oscillator is included in a circuit so that this ratio remains substantially constant and becomes substantially independent of temperature variations. To achieve this, the oscillator is included in a first current branch having a first current source. A second current branch comprising a second current source in series with a resistance is arranged parallel to the first current branch. The current sources supply currents in a fixed ratio. The current branches are coupled to one another by means of control means for controlling the current sources so that the ratio of a voltage across the CMOS gate and a voltage across the resistance is constant.