US 12,474,726 B2
Digital voltage regulator current sensing and regulation
James Keith Hodgson, Hillsboro, OR (US); Fabrice Paillet, Portland, OR (US); Christopher J. Mandic, Hillsboro, OR (US); Cary Renzema, North Plains, OR (US); Anand Ramasundar, Portland, OR (US); Sami Hyvonen, Beaverton, OR (US); Po-Cheng Chen, Tigard, OR (US); Alex Santiago Rodriguez, Hillsboro, OR (US); Sergio Carlo Rodriguez, Hillsboro, OR (US); Saravanan Ramamoorthy, Beaverton, OR (US); and Ruthvin Jeevan Suvarna, Hillsboro, OR (US)
Assigned to Intel Corporation, Santa Clara, CA (US)
Filed by Intel Corporation, Santa Clara, CA (US)
Filed on Dec. 23, 2021, as Appl. No. 17/645,896.
Prior Publication US 2022/0113751 A1, Apr. 14, 2022
Int. Cl. G05F 1/46 (2006.01)
CPC G05F 1/461 (2013.01) [G05F 1/468 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A digital linear voltage regulator apparatus comprising:
a power gate array to generate an initial power gate voltage;
a power gate replica circuit coupled to the power gate array, the power gate replica circuit to generate an initial replica voltage; and
a regulation circuit coupled to the power gate array and to the power gate replica circuit, the regulation circuit to generate a regulated replica voltage based on the initial power gate voltage and the initial replica voltage;
the power gate array to generate a regulated power gate voltage based on the regulated replica voltage, wherein the power gate replica circuit includes a first transistor coupled to a second transistor, and the regulation circuit includes:
a first amplifier circuit coupled to a third transistor,
a second amplifier circuit to generate a current regulated voltage based on the regulated replica voltage; and
a third amplifier circuit and an output stage to generate a buffered voltage based on the current regulated voltage, the power gate array to generate the regulated power gate voltage further based on the buffered voltage.