Phase interpolator with noise immunity

Details Phase interpolator with noise immunity Phase interpolator with noise immunity

1998-01-30

2000-08-29

Wells, Kenneth B.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Phase shift by less than period of input

327256, 327257, H03K 300

Patent

active

061114456

ABSTRACT:
A phase interpolator with noise immunity. The phase interpolator includes a voltage-to-current conversion circuit that receives a differential voltage and generates a differential current. The differential current is mirrored and provided to a phase Max/Min detector circuit and current switches. The phase Max/Min detectors may generate signals for a phase selector circuit. The current switches provide the mirrored current to a phase comparator and a load circuit in response to input vectors and a quadrant select signal. The phase comparator generates output waveforms from the phase interpolator.

REFERENCES:
patent: 5059992 (1991-10-01), Akiike
patent: 5241220 (1993-08-01), Karlock
patent: 5379002 (1995-01-01), Jokura
patent: 5543742 (1996-08-01), Takeda et al.
patent: 5554945 (1996-09-01), Lee et al.

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