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US 11,063,599 B2Granted
Apparatus and method for automatic search of sub-sampling phase locked loop (SS-PLL) locking acquisition
AssigneeSamsung Electronics Co., Ltd.
InventorsYongrong Zuo, Chih-Wei Yao, Wanghua Wu
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Abstract
An apparatus and method are provided. The apparatus includes a phase locked loop (PLL) configured to generate a reference signal; a sub-sampling PLL (SS-PLL) connected to the PLL and configured to sub-sample the reference signal; and a first pre-charge circuit connected to the SS-PLL and configured to allow an output voltage of the SS-PLL to transition to an operating voltage to indicate that a difference between two voltage inputs is zero on average.
Claims26
An apparatus, comprising:
- a phase locked loop (PLL) configured to generate a reference signal;
- a sub-sampling PLL (SS-PLL) connected to the PLL and configured to sub-sample the reference signal;
- and
- a first pre-charge circuit connected to a sampling device of the SS-PLL and configured to allow an output voltage of the SS-PLL to transition to an operating voltage to indicate that a difference between two voltage inputs is zero on average.
1 more element
An apparatus, comprising:
- a phase locked loop (PLL) configured to generate a reference signal;
- a sub-sampling PLL (SS-PLL) connected to the PLL and configured to sub-sample the reference signal;
- a first pre-charge circuit connected to a sampling device of the SS-PLL and configured to allow an output voltage of the SS-PLL to transition to an operating voltage to indicate that a difference between two voltage inputs is zero on average;
- a frequency locking loop (FLL) connected to the SS-PLL;
- a switch connected between the FLL and an output of the SS-PLL;
- and
- a coarse tuner connected between the output of the SS-PLL and an input of the SS-PLL.
4 more elements
A method, comprising:
- generating, by a phase locked loop (PLL), a reference signal;
- sub-sampling, by a sub-sampling PLL (SS-PLL) connected to the PLL, the reference signal;
- and
- causing, by a first pre-charge circuit connected to a sampling device of the SS-PLL, an output voltage of the SS-PLL to transition to an operating voltage to indicate that a difference between two voltage inputs is zero on average.
1 more element
A method, comprising:
- generating, by a phase locked loop (PLL), a reference signal;
- sub-sampling, by a sub-sampling PLL (SS-PLL) connected to the PLL, the reference signal;
- causing, by a first pre-charge circuit connected to a sampling device of the SS-PLL, an output voltage of the SS-PLL to transition to an operating voltage to indicate that a difference between two voltage inputs is zero on average;
- locking, by a frequency locking loop (FLL) connected to the SS-PLL, a frequency of the SS-PLL;
- switching, by a switch connected between the FLL and an output of the SS-PLL, the output of the SS-PLL to the FLL;
- and
- coarse tuning, by a coarse tuner connected between the output of the SS-PLL and an input of the SS-PLL, the SS-PLL.
4 more elements
Dependencies are inferred from the claim text.