Timothy M Faughn

US Patent:

20190334573, Oct 31, 2019

Filed:

Apr 24, 2019

Appl. No.:

16/393109

Inventors:

- Woburn MA, US
Timothy M. Faughn - Cedar Rapids IA, US
Jonathan Christian Crandall - Marion IA, US

International Classification:

H04B 1/44
H04L 5/14

Abstract:

Front end systems with switched termination for enhanced intermodulation distortion performance are provided herein. The switched termination can be used on transmit paths and/or receive paths of the front end system to suppress impedance variation when the signal paths are inactive. For example, with respect to switched termination for transmit paths, a front end system can include a frequency multiplexing circuit connected to a band switch by a first radio frequency (RF) signal path and by a second RF signal path. The band switch selectively provides the frequency multiplexing circuit with a first transmit signal over the first RF signal path and with a second transmit signal over the second RF signal path. The front end system further includes a switched termination circuit in shunt with the first RF signal path and operable to turn on to suppress impedance variation when the first RF signal path is inactive.