US 12,463,622 B1
Time domain-based power supply droop detector
Mikhail Rodionov, Markham (CA); Dirk J. Robinson, Fort Collins, CO (US); and Joyce Cheuk Wai Wong, Markham (CA)
Assigned to Advanced Micro Devices, Inc., Santa Clara, CA (US); and ATI Technologies ULC, Markham (CA)
Filed by Advanced Micro Devices, Inc., Santa Clara, CA (US); and ATI Technologies ULC, Markham (CA)
Filed on Mar. 31, 2023, as Appl. No. 18/194,376.
Int. Cl. H03K 3/14 (2006.01); H03K 3/0231 (2006.01); H03K 5/135 (2006.01); H03K 5/1534 (2006.01); H03L 7/089 (2006.01)
CPC H03K 3/14 (2013.01) [H03K 3/0231 (2013.01); H03K 5/135 (2013.01); H03K 5/1534 (2013.01); H03L 7/089 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A device comprising:
an oscillator circuit comprising:
a reference delay circuit that is connected to a regulated voltage supply and is configured to provide a reference delay circuit output signal;
a noisy delay circuit that is connected to a noisy voltage supply and is configured to provide a noisy delay circuit output signal; and
a phase comparator circuit that is:
coupled to the reference delay circuit and the noisy delay circuit; and
configured to output a phase difference between the reference delay circuit output signal and the noisy delay circuit output signal.