US 11,962,313 B2
Adaptive DCO VF curve slope control
Stephen Victor Kosonocky, Fort Collins, CO (US); Mikhail Rodionov, Richmond Hill (CA); and Joyce Cheuk Wai Wong, Toronto (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. 29, 2019, as Appl. No. 16/370,479.
Application 16/370,479 is a continuation in part of application No. 15/390,397, filed on Dec. 23, 2016, granted, now 10,382,014.
Prior Publication US 2019/0229736 A1, Jul. 25, 2019
This patent is subject to a terminal disclaimer.
Int. Cl. H03L 7/099 (2006.01); H03K 5/14 (2014.01); H03K 5/00 (2006.01)
CPC H03L 7/0991 (2013.01) [H03K 5/14 (2013.01); H03K 2005/00058 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An oscillator circuit comprising:
a first delay line having a signal input, a supply input for receiving a first voltage, and an output that transmits a first delayed signal at a first delay proportional to the first voltage;
a second delay line having a signal input, a supply input for receiving a second voltage, and an output that transmits a second delayed signal at a second delay proportional to the second voltage;
an edge detector having two inputs connected to the respective outputs of the first and second delay lines and generating an output clock based on a relationship between the first delayed signal and the second delayed signal, the output clock applied to the signal inputs of the first and second delay lines, the output clock exhibiting a voltage dependent frequency performance curve having a slope dependent at least on the second delay and a delay characteristic of the edge detector; and
wherein at least one of the first delay line, the second delay line, and the edge detector are operable to adjust the slope by altering the delay characteristic of the edge detector relative to at least one of the first and second delays and compensate for a change in frequency of the oscillator circuit due to the slope adjustment.