US 11,929,715 B2
Method and apparatus for modulating amplifier supply voltage for reducing power dissipation
Rohit Tirumala, Sunnyvale, CA (US); Miguel Salcedo, Watsonville, CA (US); and Donald Humbert, Santa Clara, CA (US)
Assigned to MICROCHIP TECHNOLOGY INCORPORATED
Filed by Microchip Technology Incorporated, Chandler, AZ (US)
Filed on Jun. 2, 2021, as Appl. No. 17/336,504.
Claims priority of provisional application 63/062,675, filed on Aug. 7, 2020.
Prior Publication US 2022/0045648 A1, Feb. 10, 2022
Int. Cl. H03F 3/04 (2006.01); G01R 19/04 (2006.01); H03F 1/02 (2006.01); H03K 5/1532 (2006.01)
CPC H03F 1/0227 (2013.01) [G01R 19/04 (2013.01); H03K 5/1532 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A circuit for modulating a power supply voltage provided to a plurality of amplifiers, the circuit comprising:
a peak detection circuit to receive respective analog input voltages provided to the plurality of amplifiers, and to detect and output information regarding a maximum instantaneous analog input voltage from the received respective analog input voltages; and
a summing circuit to output a sum of the information regarding the maximum instantaneous analog input voltage output from the peak detection circuit and an amplifier headroom voltage,
wherein a reference voltage is provided to the power supply voltage responsive to the output sum.