Dual supply amplifier

Details Dual supply amplifier Dual supply amplifier

2008-06-12

2009-11-03

Nguyen, Khanh V (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including particular power supply circuitry

C330S255000, C330S310000

Reexamination Certificate

active

07612615

ABSTRACT:
A dual supply amplifier without using an inter-stage capacitor is disclosed. The dual supply amplifier has an input stage coupled to a lower supply voltage VDD1for generating a voltage signal V3proportion to a difference between a pair of inputs. A conversion stage is coupled a higher supply voltage VDD2and a third supply voltage VDD3, which can be ground or a negative potential, for generating a signal V1with reference to VDD2and a signal V2with reference to VDD3. An output stage receives V1and V2for generating an output signal Vowith a swing between VDD2and VDD3.

REFERENCES:
patent: 5289137 (1994-02-01), Nodar et al.
patent: 7030699 (2006-04-01), Richard et al.
patent: 7061327 (2006-06-01), Doy
patent: 7061328 (2006-06-01), Doy
patent: 7183857 (2007-02-01), Doy
patent: 2008/0174372 (2008-07-01), Tucker et al.

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