Amplifiers – With semiconductor amplifying device – Including field effect transistor
Reexamination Certificate
2011-04-26
2011-04-26
Nguyen, Khanh V (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including field effect transistor
C330S136000, C330S285000, C330S297000
Reexamination Certificate
active
07932780
ABSTRACT:
Voltage Enhancement Circuitry (VEC) for amplifiers, suitable of being implemented as an Integrated Circuit (IC), that comprises a VEC driver with a low output resistance (Rdson) while being in its inactive mode and a linearly increasing resistance that is changing linearly with the input control signal, while entering into its active mode, above a determined threshold; external contacts in the VEC, for connecting, whenever required, external feedback elements across the contacts; an external feedback loop connected to an input of the VEC driver, for sensing changes in the enhancement power; a threshold programming module, for externally programming and determining a threshold level for the input signal, above which enhancement is provided shaping the amplified video envelope pulse; an I-Boost module for sampling the amplitude of the video envelope input current and for amplifying the input current up to a pre-defined level; and a current controlled bias circuit for shifting, whenever required, the bias of the lower and/or of the upper valves of the VEC driver.
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Marsteller & Associates, P.C.
Nguyen Khanh V
Paragon Communications Ltd.
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