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. 17, 1985
Filed:
Feb. 07, 1984
Hikmet Sari, Creteil, FR;
U.S. Philips Corporation, New York, NY (US);
Abstract
An auto-adaptive amplitude-equalizing arrangement for digital radio links having an intermediate-frequency signal input, a transversal filter and a circuit for the control of the filter. The transversal filter comprises a delay circuit providing, with respect to the intermediate-frequency signal input, a delay T equal to (2k-1)/4F.sub.c, where k is a positive integer and F.sub.c the center frequency of the intermediate-frequency signal, a first and a second multiplication circuit whose inputs are respectively connected to the output of the delay circuit and to the intermediate-frequency signal input, and an adder connected to the outputs of the multiplication circuits. The first multiplication circuit may be an analog amplifier whose gain is controlled by the control circuit, or may comprise a fixed-gain amplifier and a digitally controlled attenuator, the control inputs of the attenuator being connected to the count outputs of an up/down-counter, which is controlled by a zero comparator connected to the output of the control circuit.