US 11,658,570 B2
Seamless non-linear voltage regulation control to linear control apparatus and method
Harish Krishnamurthy, Beaverton, OR (US); Sheldon Weng, Lake Oswego, OR (US); Nachiket Desai, Hillsboro, OR (US); Suhwan Kim, Portland, OR (US); and Fabrice Paillet, Portland, OR (US)
Assigned to Intel Corporation, Santa Clara, CA (US)
Filed by Intel Corporation, Santa Clara, CA (US)
Filed on Sep. 1, 2020, as Appl. No. 17/9,661.
Prior Publication US 2022/0069703 A1, Mar. 3, 2022
Int. Cl. G06F 1/00 (2006.01); H02M 3/157 (2006.01); G06F 1/26 (2006.01); H02M 3/158 (2006.01); H03H 17/02 (2006.01)
CPC H02M 3/157 (2013.01) [G06F 1/26 (2013.01); H02M 3/1584 (2013.01); H03H 17/0211 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
an analog-to-digital converter to convert an analog voltage to a digital representation indicative of an error between the analog voltage and a reference voltage;
a digital filter to receive the digital representation and to generate a duty cycle command, wherein the duty cycle command is to instruct a controller to adjust a duty cycle of a signal which is used to adjust the analog voltage, and the digital filter comprises a feedforward path and an integral path; and
a multiplexer to couple the feedforward path to the integral path when the analog voltage is above a droop threshold which is less than the reference voltage, and to bypass the feedforward path when the analog voltage is below the droop threshold, wherein to bypass the feedforward path, the multiplexer is to pass a 0 to the integral path in place of an output of the feedforward path.