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US 12,652,026 B2Granted
Clock output device and clock detection method
AssigneeRealtek Semiconductor Corp.
InventorYun-Hsien Lin
Life of this patent
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Abstract
A clock output device includes a noise detector circuit and a clock buffer circuit. The noise detector circuit is configured to be enabled according to a request signal to determine whether a reference clock signal is a noise according to at least one of a common-mode level or a frequency of the reference clock signal and generate an enable signal. The clock buffer circuit is configured to be enabled according to the enable signal to generate an output clock signal according to the reference clock signal.
Claims12
A clock output device, comprising:
- a noise detector circuit configured to be enabled according to a request signal and determine whether a reference clock signal is a noise based on a common-mode level or a of the reference clock signal to generate an enable signal,
- wherein the noise detector circuit is configured to determine whether the common-mode level of the reference clock signal exceeds a threshold voltage according to the request signal, to generate the enable signal;
- and
- a clock buffer circuit configured to be enabled according to the enable signal to generate an output clock signal according to the reference clock signal.
1 more element
A clock detection method, comprising:
- determining whether a reference clock signal is a noise according to a request signal by a common-mode level of the reference clock signal, in order to generate an enable signal;
- and
- enabling a clock buffer circuit according to the enable signal, in order to generate an output clock signal by the clock buffer circuit according to the reference clock signal,
- wherein determining whether the reference clock signal is the noise according to the request signal by the common-mode level of the reference clock signal, in order to generate the enable signal comprises:
- determining whether the common-mode level of the reference clock signal exceeds a threshold voltage according to the request signal, to generate the enable signal.
2 more elements
Dependencies are inferred from the claim text.