US 12,267,082 B2
Frequency-regulated oscillator circuit
Pragya Priya Malakar, Chandler, AZ (US); and John Pigott, Phoenix, AZ (US)
Assigned to NXP USA, Inc., Austin, TX (US)
Filed by NXP USA, Inc., Austin, TX (US)
Filed on Aug. 31, 2023, as Appl. No. 18/459,289.
Prior Publication US 2025/0080123 A1, Mar. 6, 2025
Int. Cl. H03L 3/00 (2006.01); H03L 7/08 (2006.01); H03L 7/089 (2006.01); H03L 7/095 (2006.01); H03L 7/099 (2006.01)
CPC H03L 7/0991 (2013.01) [H03L 3/00 (2013.01); H03L 7/0802 (2013.01); H03L 7/0891 (2013.01); H03L 7/095 (2013.01); H03L 7/0995 (2013.01)] 20 Claims
OG exemplary drawing
 
1. Oscillator circuitry comprising:
a first oscillator configured to generate a first clock signal;
a second oscillator configured to generate a second clock signal; and
a lock detector configured to:
detect a stable phase lock between the first clock signal and the second clock signal; and
switch an output of the oscillator circuitry from the first clock signal to the second clock signal in response to detecting the stable phase lock.