Phase interpolator
AssigneeRealtek Semiconductor Corp.
InventorChien-Wen CHEN
Life of this patent
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Abstract
A phase interpolator includes differential pairs, a switching circuit, an output stage, and a correction circuit. The differential pairs generate a first signal and a second signal according to a first group of input signals and a second group of input signals. The switching circuit is turned on or turned off, according to control signals, to transmit the first signal and the second signal to a current source circuit, in order to control a value of the first signal and a value of the second signal. The output stage generates a first output signal according to the first signal and the second signal. The correction circuit provides and stables a common mode voltage of the first output signal according to the first output signal.
Claims20
A phase interpolator, comprising:
- a plurality of differential pairs configured to generate a first signal and a second signal according to a first group of input signals and a second group of input signals;
- a switching circuit configured to transmit the first signal and the second signal to a current source circuit and control a value of the first signal and a value of the second signal according to a plurality of control signals;
- an output stage configured to generate a first output signal according to the first signal and the second signal;
- and
- a correction circuit configured to provide a common mode voltage of the first output signal according to the first output signal.
A phase interpolator, comprising:
- an input stage configured to generate a first signal and a second signal according to a first group of input signals and a second group of input signals;
- a switching circuit configured to transmit the first signal and the second signal to a current source circuit and control a value of the first signal and a value of the second signal according to a plurality of control signals;
- an output stage configured to generate a first output signal according to the first signal and the second signal;
- and
- a correction circuit configured to provide and stable a common mode voltage of the first output signal with one of a feedback mechanism and an AC-coupling mechanism according to the first output signal.
Dependencies are inferred from the claim text.