Multiphase clock signal generating circuit and eye diagram generating circuit
AssigneeRealtek Semiconductor Corp.
InventorTse-Hung Chen
Life of this patent
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Abstract
A multi-phase clock signal generating circuit, configured to generate a plurality of output clock signals with different phases, comprising: a charge pump, configured to generate a control voltage according to a reference clock signal and a target clock signal; a delay circuit, comprising a delay chain with a plurality of delay units, configured to generate a plurality of candidate clock signals and the target clock signal according to the control voltage; and a phase selecting circuit, configured to select at least two of the candidate clock signals as the output signals.
Claims20
A multi-phase clock signal generating circuit, configured to generate a plurality of output clock signals with different phases, comprising:
- a charge pump, configured to generate a control voltage according to a reference clock signal and a target clock signal;
- a delay circuit, comprising a delay chain with a plurality of delay units, configured to generate a plurality of candidate clock signals and the target clock signal according to the control voltage;
- and
- a phase selecting circuit, configured to select at least two of the candidate clock signals as the output signals.
An eye diagram generating circuit, comprising:
- a comparator, configured to use a plurality of output clock signals with different phases to scan a data signal, to generate an eye diagram;
- and
- a multi-phase clock signal generating circuit, comprising:
- a charge pump, configured to generate a control voltage according to a reference clock signal and a target clock signal;
- a delay circuit, comprising a delay chain with a plurality of delay units, configured to generate a plurality of candidate clock signals and the target clock signal according to the control voltage;
- and
- a phase selecting circuit, configured to select at least two of the candidate clock signals as the output signals.
Dependencies are inferred from the claim text.