US 12,461,166 B2
On-die power supply monitor design
Ankit Kamleshbhai Zalawadiya, Ahmedabad (IN); Krishnan-Talkad Sukumar, Bangalore (IN); and Ravinder Reddy Rachala, Austin, TX (US)
Assigned to Advanced Micro Devices, Inc., Santa Clara, CA (US)
Filed by Advanced Micro Devices, Inc., Santa Clara, CA (US)
Filed on Oct. 21, 2021, as Appl. No. 17/507,597.
Prior Publication US 2023/0129642 A1, Apr. 27, 2023
Int. Cl. G01R 31/40 (2020.01); G01R 19/00 (2006.01); G06F 1/04 (2006.01); G06F 1/28 (2006.01); H03K 3/03 (2006.01); H03K 3/037 (2006.01)
CPC G01R 31/40 (2013.01) [G01R 19/0084 (2013.01); G06F 1/04 (2013.01); G06F 1/28 (2013.01); H03K 3/0315 (2013.01); H03K 3/037 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A power supply monitor circuit comprising:
a first ring oscillator configured to:
receive a pulse and a power supply voltage; and
generate, based on the power supply voltage, an output comprising a plurality of cycles responsive to determining the pulse has ended;
conversion circuitry configured to convert the output comprising the plurality of cycles to a value indicating a measure of the power supply voltage; and
a pulse generator comprising a second ring oscillator, wherein the second ring oscillator is configured to generate the pulse with a pulse width duration that is dependent on one or more of process, voltage, or temperature.