Patent · US Active

Method and system for increasing efficiency in a radio front-end

US8457685B1 · kind B1 · utility

7Cited by

7References

20Claims

0Family size

Assignee

RF Micro Devices, Inc. · US

Inventors

Ruediger Bauder · Feldkirchen-Westerham, DE
James M. Retz · Cedar Rapids, US

Key dates

Filing date	Apr 20, 2010
Grant date	Jun 4, 2013
Priority date	—
Expiry date	Aug 16, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH04B1/18
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

A radio frequency (RF) circuit including control circuitry adapted to select one of multiple modes, including a first transmit mode and a first receive mode. The first receive circuitry is coupled to a first node, and the first node is coupled to a first antenna. During the first receive mode the first receive circuitry is adapted to receive a first RF input signal having a first receive frequency. First power amplifier circuitry including a first final stage provides a first RF output signal having a first transmit frequency for transmission from the first antenna during the first transmit mode. First impedance transformation circuitry is coupled between an output of the first final stage and the first node. During the first receive mode the first final stage is disabled and the first final stage and the first impedance transformation circuitry present a substantially high impedance to the first node.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.