US 12,249,997 B2
Phase locked loop assisted fast start-up apparatus and method
Somnath Kundu, Hillsboro, OR (US); Hao Luo, Milpitas, CA (US); and Brent Carlton, Portland, OR (US)
Assigned to Intel Corporation, Santa Clara, CA (US)
Filed by Intel Corporation, Santa Clara, CA (US)
Filed on Jun. 3, 2021, as Appl. No. 17/338,497.
Prior Publication US 2022/0393688 A1, Dec. 8, 2022
Int. Cl. H03L 7/099 (2006.01)
CPC H03L 7/099 (2013.01) 20 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a resonator;
a phase locked loop (PLL) coupled to the resonator; and
a plurality of switches to operate the PLL in open loop during a configuration phase to determine a target oscillating frequency setting of the PLL, wherein the open loop of the PLL is coupled to the resonator to provide it with energy from an oscillator of the PLL during the configuration phase.