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:
Dec. 22, 1981
Filed:
Aug. 27, 1979
Karl Goser, Munich, DE;
Siemens Aktiengesellschaft, Berlin & Munich, DE;
Abstract
The invention relates to a method for operating recursive filter circuits or analog storage circuits constructed according to the charge coupled device principle and relates to a circuit arrangement for implementing the method, in which method only each respective second stage of a CCD is occupied with a charge representing a sampling value of an analog signal and the respective stages lying between these stages concerned and left empty. Known circuits constructed according to the CCD principle conduct the signal from the output stage of a CCD chain to the input of the CCD loop via an amplifier to which the input signal is supplied at the same time. Thereby, the amplification must very precisely amount to one. An amplifier of the high stability required thereto which is arranged in common with the concerned CCD on a chip cannot be satisfactorily realized. By means of the invention, a method is specified in which the amplifier is replaced by means of modulation of a sampling value with a reference signal and by means of a charge amount corrected in accord with the result of the modulation.