US 12,332,287 B2
Radio-frequency power detector with transimpedance amplifier and input offset mitigation
Mohamed Abouzied, La Jolla, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Jun. 12, 2023, as Appl. No. 18/333,300.
Prior Publication US 2024/0410922 A1, Dec. 12, 2024
Int. Cl. G01R 21/133 (2006.01); G01R 21/01 (2006.01)
CPC G01R 21/133 (2013.01) [G01R 21/01 (2013.01)] 20 Claims
OG exemplary drawing
 
1. Wireless circuitry comprising:
a radio-frequency amplifier;
a mixer coupled to the radio-frequency amplifier;
a power detection circuit coupled to the radio-frequency amplifier or the mixer; and
a differential amplifier coupled to an output of the power detection circuit, the differential amplifier including
a first transistor having a first source-drain terminal coupled to a first power supply line, a gate terminal configured to receive a first input voltage from the output of the power detection circuit, and a second source-drain terminal coupled to a first output port of the differential amplifier, and
a second transistor having a first source-drain terminal coupled to the first power supply line, a gate terminal configured to receive a second input voltage from the output of the power detection circuit, and a second source-drain terminal coupled to a second output port, different than the first output port, of the differential amplifier.