Comparator circuit, related method of comparing a vector to...

Details Comparator circuit, related method of comparing a vector to... Comparator circuit, related method of comparing a vector to...

2008-03-18

2008-03-18

Nguyen, Khanh Van (Department: 2817)

Amplifiers

Modulator-demodulator-type amplifier

Reexamination Certificate

active

07345531

ABSTRACT:
The present invention is directed to a comparator circuit for use with in-phase and quadrature phase signals and a method of comparing a resultant vector of the in-phase and quadrature phase signals. In one embodiment, the comparator circuit includes a non-titled comparison circuit that compares a resultant vector of the in-phase and quadrature phase signals to vertical and horizontal comparison boundary member pairs. The comparator circuit also includes a tilted comparison circuit, coupled to the non-tilted comparison circuit, that compares the resultant vector to comparison boundary member diagonals coupled to the vertical and horizontal comparison boundary member pairs. The comparator circuit may still further include a combiner circuit that provides a comparison signal based on signals from the non-tilted and tilted comparison circuits.

REFERENCES:
patent: 7076698 (2006-07-01), Busking
patent: 0 598 585 (1994-05-01), None
patent: WO 01/24472 (2001-04-01), None
patent: WO 01/56147 (2001-08-01), None

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