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. 18, 2003
Filed:
Oct. 15, 2001
Pierre Dobrovolny, North Riverside, IL (US);
Zenith Electronics Corporation, Lincolnshire, IL (US);
Abstract
An RF A/B switch associated with a receiver has first and second inputs and an output. A first diode circuit includes a plurality of diodes and an impedance network coupled between the first input and the output. A second diode circuit includes a plurality of diodes and an impedance network coupled between the second input and the output. A controller establishes a common series biasing current through at least one of the diodes in each of the first and second diode circuits. The common series biasing current biases one of the first and second diode circuits so as to configure a respective one of the impedance networks in a low pass filter configuration that couples a signal on one of the first and second inputs to the output, and the common series biasing current biases the other of the first and second diode circuits in a blocking configuration so as to block a signal on the other of the first and second inputs from the output.