US 11,755,047 B2
Apparatus and methods for compensating supply sensitive circuits for supply voltage variation
Mohamed El-Nozahi, Cairo (EG); and Amr G. Elgamal, Cairo (EG)
Assigned to Analog Devices International Unlimited Company, Limerick (IE)
Filed by Analog Devices International Unlimited Company, County Limerick (IE)
Filed on Oct. 21, 2020, as Appl. No. 16/949,234.
Prior Publication US 2022/0121234 A1, Apr. 21, 2022
Int. Cl. G05F 1/577 (2006.01); G05F 3/24 (2006.01); H03F 1/02 (2006.01); H01Q 3/36 (2006.01)
CPC G05F 1/577 (2013.01) [G05F 3/242 (2013.01); H03F 1/0211 (2013.01); H01Q 3/36 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An electronic system comprising:
a supply conductor configured to route a supply voltage having a nominal voltage level; and
a plurality of semiconductor dies each configured to receive the supply voltage from the supply conductor, wherein each of the plurality of semiconductor dies comprises:
a supply sensing circuit configured to sense a local voltage level of the supply voltage and generate a sense signal based on the local voltage level of the supply voltage;
a bias control circuit configured to adjust a bias signal based on the sense signal to account for a difference between the nominal voltage level and the local voltage level of the supply voltage and compensate for supply voltage variation in the electronic system; and
a signal processing circuit biased by the bias signal, wherein the signal processing circuit includes a radio frequency (RF) amplifier having a DC operating point set by the bias signal, the RF amplifier configured to amplify an RF signal based at least in part on the bias signal.