US 12,294,337 B2
Wideband auxiliary input for low noise amplifiers
Rong Jiang, San Diego, CA (US); and Khushali Shah, San Diego, CA (US)
Assigned to PSEMI CORPORATION, San Diego, CA (US)
Filed by pSemi Corporation, San Diego, CA (US)
Filed on Mar. 28, 2023, as Appl. No. 18/191,699.
Application 18/191,699 is a continuation of application No. 17/189,062, filed on Mar. 1, 2021, granted, now 11,646,703.
Prior Publication US 2023/0291368 A1, Sep. 14, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H03F 1/32 (2006.01); H03F 1/22 (2006.01); H03F 1/26 (2006.01); H03F 1/56 (2006.01); H03F 3/195 (2006.01); H03F 3/72 (2006.01); H04B 1/16 (2006.01)
CPC H03F 3/195 (2013.01) [H03F 1/223 (2013.01); H03F 1/26 (2013.01); H03F 1/565 (2013.01); H03F 3/72 (2013.01); H04B 1/16 (2013.01); H03F 2200/294 (2013.01); H03F 2200/318 (2013.01); H03F 2200/451 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A multiband radio frequency (RF) receiver front end comprising:
an auxiliary (AUX) terminal for receiving a wideband input signal with a frequency spectrum including multiple selectable frequency bands;
an amplifier with multiple amplifier-inputs in correspondence with the multiple selectable frequency bands, the amplifier being configured to amplify the wideband input signal, and
a switching block coupling the AUX terminal to the multiple amplifier-inputs;
when a selectable frequency band is selected, a switch of the switching block is in ON state and the AUX terminal is coupled to a corresponding amplifier-input of the multiple amplifier-inputs, and
when the selectable frequency band is not selected, the switch of the switching block is in OFF state and the AUX terminal is decoupled from the corresponding amplifier-input of the multiple amplifier-inputs.