Phase interpolation circuit and method of generating phase...

Details Phase interpolation circuit and method of generating phase... Phase interpolation circuit and method of generating phase...

2006-05-01

2009-06-23

Wells, Kenneth B (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Phase shift by less than period of input

C327S233000, C327S234000, C327S235000, C327S236000, C327S254000, C327S255000, C327S256000

Reexamination Certificate

active

07551013

ABSTRACT:
A phase interpolation circuit and method are provided that are capable of operating in a low voltage and capable of generating a substantially exact phase-interpolation signal, where the phase interpolation circuit is configured to output a phase interpolation signal having a phase between phases of at least two input signals and comprises an interpolation unit configured to discharge an output node by a first interpolation control signal in case a first input signal of two input signals having different phases is inputted to the interpolation unit when the output node has been precharged to a power supply voltage level, the interpolation unit additionally discharging the output node by a second interpolation control signal in case of input of a second input signal of the two input signals; a comparison unit for comparing a reference voltage level and a voltage level of the output node of the interpolation unit to output a signal corresponding to the comparison; and a short pulse generation unit for generating a short pulse in response to an output signal of the comparison unit.

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patent: 7196564 (2007-03-01), Rajagopal et al.
patent: 2003/0042957 (2003-03-01), Tamura
patent: 2003/0122588 (2003-07-01), Glenn

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