US 12,445,116 B2
Combined process and temperature adjustable voltage regulation
Kent Jaeger, Cary, IL (US); Lawrence E. Connell, Naperville, IL (US); and Neal Hollenbeck, Palatine, IL (US)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on Nov. 10, 2023, as Appl. No. 18/506,711.
Application 18/506,711 is a continuation of application No. PCT/US2021/031777, filed on May 11, 2021.
Prior Publication US 2024/0080019 A1, Mar. 7, 2024
Int. Cl. H03K 3/011 (2006.01); G05F 1/46 (2006.01); G06F 1/3296 (2019.01); H03K 3/03 (2006.01)
CPC H03K 3/011 (2013.01) [G05F 1/463 (2013.01); G06F 1/3296 (2013.01); H03K 3/0315 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A device comprising a temperature-variable voltage controller, wherein the temperature-variable voltage controller comprises:
a voltage regulator;
a process monitor circuit coupled to the voltage regulator, wherein the process monitor circuit comprises
a ring oscillator, and
a frequency counter coupled to an output of the ring oscillator;
a temperature-variable current source outputting a current which varies with temperature which is coupled to an input of the voltage regulator to produce an output voltage of the voltage regulator that is compensated based on a change in temperature of the temperature-variable current source; and
a process feedback circuit comprising a microprocessor and memory configured to adjust the output voltage of the voltage regulator to set a resistance value of a first variable load element and to set a resistance value of a second variable load element based on an output value of the frequency counter, and wherein the microprocessor is operable to apply the output value of the frequency counter to a curve fitting function to derive the resistance value of the first variable load element and the resistance value of the second variable load element.