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:
Aug. 31, 2010
Filed:
May. 27, 2008
Michael Wendell Vice, El Granada, CA (US);
Michael Wendell Vice, El Granada, CA (US);
Avago Technologies Wireless IP (Singapore) Pte. Ltd., Singapore, SG;
Abstract
A four-state digital attenuator for an RF signal includes a first external terminal adapted to receive a first control voltage; a second external terminal adapted to receive a second control voltage, and a third external terminal connected to a fixed supply voltage. The four-state digital attenuator receives no supply voltages other than the control voltages and the fixed supply voltage connected to the third external terminal. A plurality of series paths are provided from an RF input to an RF output, each of the series paths passing through a node. A plurality of shunt paths are provided from the node to the third external terminal. A driver selectively enables the series paths and shunt paths in response to the first and second control voltages to provide four attenuation levels for an RF signal from the RF input to the RF output.