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:
Nov. 24, 1981
Filed:
Sep. 06, 1979
Ernst Hebenstreit, Munich, DE;
Siemens Aktiengesellschaft, Berlin & Munich, DE;
Abstract
A linear output stage for charge-coupled circuits is disclosed. Charge-coupled circuits (CCDs) are of significance in the processing of analogue signals as they can be used as analogue shift registers. Conventional output circuits of CCDs are constructed with source followers. The non-linear characteristic of an MOS source follower which is provided with an external load resistor is substantially linearized by means of a highly ohmic source resistor. A fundamental disadvantage of these output circuits is that the evaluation of the signal is mainly carried out by means of a space charge capacitance which is voltage-dependent since it is dependent upon space charge depth. In the output stage disclosed, the signal charge is mainly absorbed by means of a constant oxide capacitance of the evaluator electrode. The electrode receives the charge not in floating fashion but rather at a fixed potential.