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. 16, 1976
Filed:
Jul. 31, 1975
Robert Henry Walden, New Providence, NJ (US);
Bell Telephone Laboratories, Incorporated, Murray Hill, NJ (US);
Abstract
A charge transfer analog signal filter is described in which a plurality of charge storage cells are connected in series to form a delay line having a time delay T between its input and output cells. In a feed-forward rejection filter the analog signal is applied to the input cell through a cell of area A.sub.1 and to the output cell through another cell of area A.sub.2. The transfer function of the rejection filter is ##EQU1## In a feedback bandpass filter the analog signal is applied to the input cell through a cell of area A.sub.1, and the output cell is coupled to the input cell through the series combination of an analog inverter and another cell of area A.sub.2. The transfer function of the bandpass filter is ##EQU2##