US 12,072,358 B2
Devices and methods related to compensated power detector
Adrian John Bergsma, Kanata (CA)
Assigned to Skyworks Solutions, Inc., Irvine, CA (US)
Filed by SKYWORKS SOLUTIONS, INC., Irvine, CA (US)
Filed on Sep. 23, 2022, as Appl. No. 17/952,097.
Application 17/952,097 is a continuation of application No. 16/435,866, filed on Jun. 10, 2019, granted, now 11,454,657.
Claims priority of provisional application 62/682,972, filed on Jun. 10, 2018.
Prior Publication US 2023/0110327 A1, Apr. 13, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G01R 21/14 (2006.01); G01R 21/00 (2006.01); H01L 23/66 (2006.01); H03F 3/195 (2006.01); H03F 3/45 (2006.01); H04B 17/20 (2015.01)
CPC G01R 21/14 (2013.01) [G01R 21/00 (2013.01); H01L 23/66 (2013.01); H03F 3/195 (2013.01); H03F 3/4508 (2013.01); H04B 17/20 (2015.01); H01L 2223/6644 (2013.01); H01L 2223/6677 (2013.01); H03F 2200/105 (2013.01); H03F 2200/451 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A wireless device comprising:
a radio circuit;
an antenna; and
a power detector including a first detection cell including a first emitter follower detector having a base, a collector and an emitter, the first detection cell configured such that the base only receives a bias voltage, the collector is only coupled to a supply node, and the emitter provides an output, the power detector further including a second detection cell including a second emitter follower detector having a base, a collector and an emitter, the second detection cell configured such that the base receives a bias voltage and a radio-frequency signal, the collector is coupled to a supply node and a filter capacitance, and the emitter provides an output, the power detector further including an error amplifier having a first input coupled to the output of the first emitter follower detector, a second input for receiving a reference voltage, and an output coupled to the base of each of the first and second emitter follower detectors, such that the bias voltage provided to the base of the first emitter follower detector is representative of an output voltage of the error amplifier and is the same as the bias voltage provided to the base of the second emitter follower detector.