Bias filtering module including MOS capacitors

Details Bias filtering module including MOS capacitors Bias filtering module including MOS capacitors

2008-07-01

2008-07-01

Vuong, Quochien B (Department: 2618)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C455S127100, C455S307000, C455S333000, C455S343100, C370S311000

Reexamination Certificate

active

07395098

ABSTRACT:
A bias filtering module with at least two capacitive levels satisfies both a settle time requirement and a filtering requirement using a voltage dependent filter module whose capacitance is a function of a voltage potential on the filtering circuitry output terminal. The final capacitance level is approximately three times larger than the initial capacitance level. MOS capacitors having a voltage dependent charge capacity within the bias filtering module are coupled between a plurality of bias lines and circuit common. In an alternate embodiment, a selectable first group of capacitors are switched into connection within the bias filtering module as a second group of capacitors approximately reach a fully charged state within a specified settle time to provide improved filtering.

REFERENCES:
patent: 5666355 (1997-09-01), Huah et al.
patent: 5794137 (1998-08-01), Harte
patent: 5799256 (1998-08-01), Pombo et al.
patent: 6047168 (2000-04-01), Carlsson et al.
patent: 6078826 (2000-06-01), Croft et al.
patent: 6154642 (2000-11-01), Dumont et al.
patent: 6463050 (2002-10-01), Nagashima

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