Gate-boosted, variable voltage supply rail amplifier

Details Gate-boosted, variable voltage supply rail amplifier Gate-boosted, variable voltage supply rail amplifier

2011-08-30

2011-08-30

Choe, Henry K (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including particular power supply circuitry

C330S296000

Reexamination Certificate

active

08008975

ABSTRACT:
In at least one embodiment, an electronic system includes an amplifier having an on-chip charge pump to provide a gate boost voltage to boost a gate voltage of at least one on-chip field effect transistor (FET) of an output stage of an amplifier. In at least one embodiment, the gate boost voltage boosts the gate voltage higher than the supply voltage rail to increase an overdrive voltage of the on-chip FET. In at least one embodiment, the gate boost voltage boosts the DC bias of an input signal and, thus, generation of gate boost voltage by the on-chip charge pump is signal-independent, i.e. independent of the input signal. Increasing the overdrive voltage increases the efficiency of the amplifier by decreasing the difference between the maximum swing of the output voltage and the voltage supply rails of the at least one on-chip FET relative to conventional designs.

REFERENCES:
patent: 5880638 (1999-03-01), Schaffer
patent: 6297698 (2001-10-01), Callahan, Jr.
patent: 6636098 (2003-10-01), Kizer
patent: 6747515 (2004-06-01), Callahan, Jr.
patent: 7005924 (2006-02-01), Can et al.

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