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:
Mar. 23, 1993
Filed:
Jun. 14, 1991
Herbert Meier, Moosburg, DE;
Martin Sellmeir, Neufinsing, DE;
Abstract
A circuit arrangement is described with the aid of which a control signal can be indicated in dependence upon reaching a predetermined desired value voltage at an energy-storage element at the end of a charging cycle. In the course of said charging cycle the energy-storage element is charged by rectification of an HF carrier pulse. The circuit arrangement contains a signal-storage element (FF) which in the active state emits a control signal. Furthermore, an envelope detector circuit (DE, CE, RE, T2) is provided which furnishes a switching signal in dependence upon the termination of the HF carrier-oscillation pulse. A voltage comparator (R3, T3, R4, C2, R1, R2, OP) compares a voltage value dependent on the voltage value at the energy-storage element (CC) with a voltage value which is related to the voltage value at the energy-storage element (CC) in such a manner that in the presence of the desired voltage value at the energy-storage element (CC) the compared voltage values are equal. On identity of the compared voltage values the voltage comparator emits an activiating signal for the storage element (FF) which sets the latter to the active state. On receiving the control signal furnished by the envelope detector circuit a switching means (A1, A2, T1) applied to the voltage comparator the voltage at the energy-storage element (CC) as supply voltage while on receiving the control signal furnished by the signal-storage element (FF) it separates the voltage comparator from its supply voltage.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile