Amplifiers – With semiconductor amplifying device – Including balanced to unbalanced circuits and vice versa
Reexamination Certificate
2005-03-15
2005-03-15
Nguyen, Khanh V. (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including balanced to unbalanced circuits and vice versa
C330S260000, C330S258000
Reexamination Certificate
active
06867653
ABSTRACT:
An apparatus for converting a fully-differential input signal to an output signal which varies between two rail limits and includes: (a) a first buffer receiving one component at a first input, presenting a first buffer output signal at a first buffer output and generating a first representative signal; (b) a second buffer receiving the other component at a second input, presenting a second buffer output signal at a second buffer output and generating a second representative signal; (c) a control unit coupled with at least one of the buffer outputs and comparing the buffer output signals with a reference signal to generate at least one control signal for reducing drift in the first and second components; and (d) an output unit coupled for combining the representative signals from the buffers to present the single output signal with rail-to-rail variance at an output locus.
REFERENCES:
patent: 6163216 (2000-12-01), Murray et al.
patent: 6294958 (2001-09-01), Eschauzier
patent: 6542032 (2003-04-01), Escobar-Bowser et al.
patent: 6784736 (2004-08-01), Parkhurst
Carreto Maria-Flora
Escobar-Bowser Pricilla
Brady W. James
Nguyen Khanh V.
Swayze, Jr. W. Daniel
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
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