Fine gain and phase adjustment of analog quadrature filters

Details Fine gain and phase adjustment of analog quadrature filters Fine gain and phase adjustment of analog quadrature filters

2008-03-31

2010-12-21

Donovan, Lincoln (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

Unwanted signal suppression

Reexamination Certificate

active

07855594

ABSTRACT:
Methods and apparatus to fine gain and/or phase adjustment of analog quadrature filters are described. In one embodiment, gain and/or phase of an analog quadrature filter may be digitally controlled by switching one or more resistors coupled to the quadrature filter. Other embodiments are also described.

REFERENCES:
patent: 4168440 (1979-09-01), Gray
patent: 2006/0186952 (2006-08-01), Lou et al.
patent: 2009/0066549 (2009-03-01), Thomsen et al.

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