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:
Oct. 05, 1999
Filed:
Jul. 15, 1997
Udo Schillhof, Itzstedt, DE;
Wilhelm Graffenberger, Hamburg, DE;
U.S. Philips Corporation, New York, NY (US);
Abstract
A circuit arrangement having at least two signal paths which can be alternately enabled by feeding respective controllable current sources and by logic signals selecting one of these controllable current sources, while, at a transition from one signal path to the other, the controllable current sources of the relevant two signal paths are controllable by a time-continuously changing control signal during a transition interval, such that currents which can be supplied by these two controllable current sources change continuously and in opposite directions. The object of implementing this circuit arrangement in such a way that the number of components is noticeably reduced in a device enabling a gradual transition from one setting position to the next is achieved with a selection circuit (1) having a control stage (11; 21; 31; 41; 51) for each signal path (T18,T19; T28,T29; T38,T39; T48,T49; T58,T59), each control stage (11; 21; 31; 41; 51) including: