US 11,892,869 B2
Clock generator device and clock generation method
Wei-Ping Wang, Zhubei (TW)
Assigned to SIGMASTAR TECHNOLOGY LTD., Fujian (CN)
Filed by SigmaStar Technology Ltd., Fujian (CN)
Filed on Dec. 1, 2021, as Appl. No. 17/539,363.
Claims priority of application No. 202110838951.6 (CN), filed on Jul. 23, 2021.
Prior Publication US 2023/0025363 A1, Jan. 26, 2023
Int. Cl. G06F 1/12 (2006.01); G06F 1/06 (2006.01)
CPC G06F 1/06 (2013.01) 8 Claims
OG exemplary drawing
 
1. A clock generator device, comprising:
a first clock generator circuit, having a first starting voltage, generating a first clock signal in response to a supply voltage;
a second clock generator circuit, having a second starting voltage, generating a second clock signal in response to the supply voltage, wherein the first starting voltage is lower than the second starting voltage;
a first detector circuit, detecting the second clock signal to generate a validation signal;
a selection circuit, selectively outputting one of the first clock signal and the second clock signal according to the validation signal;
a second detector circuit, detecting the first clock signal to generate a first control signal;
a first delay circuit, for delaying the validation signal to generate a first signal;
a second delay circuit, for delaying the first control signal to generate a second signal; and
a logic gate circuit, for generating a second control signal according to the first signal and the second signal;
wherein, a delay time of the first delay circuit is less than a delay time of the second delay circuit.