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:
Jun. 23, 1998
Filed:
Aug. 30, 1996
Daniel Aebischer, Neuchatel, CH;
Centre Suisse D'Electronique et de Microtechnique SA, Neuchatel, CH;
Abstract
A circuit that includes a series arrangement of a capacitive element (C) and an active component (M10) forming an equivalent resistor. A DC current source (120 is connected to the active component, and a transistor (M11, 11) is provided for altering the conductance of the active component and fixing the mean level of a AC voltage (U.sub.ac). Such a voltage is applied to the terminals of the series arrangement, and the biased voltage having the desired mean level (U.sub.out) is tapped off the node (10) between the capacitive element (C) and the active component. A capacitive voltage divider (13) is also provided for modulating the DC current (i) passing through the active component (M10), with a fraction of the AC voltage to be biased. The circuit is particularly applicable to the determination of the mean level of the voltage produced by a quartz oscillator.