Rail to rail output stage of an amplifier

Details Rail to rail output stage of an amplifier Rail to rail output stage of an amplifier

1998-07-20

2000-02-22

Lee, Benny T.

Amplifiers

With semiconductor amplifying device

Including push-pull amplifier

330267, H03F 318

Patent

active

060284811

ABSTRACT:
A gain stage is disclosed for use in an amplifier which provides an output signal. The gain stage includes a first transistor including a base, an emitter and a collector. The base is coupled to an input signal applied to the gain stage, and the emitter is coupled to a first source of operating potential. The gain stage also includes a second transistor including a base, an emitter and a collector. The collector of the second transistor is coupled to the collector of the first transistor for providing the output signal. The emitter of the second transistor is coupled to a second source of operating potential. The gain stage also includes a level shifter coupled to both the input signal and the base of the second transistor. The level shifter provides level shifting and produces a gain signal responsive to the input signal.

REFERENCES:
patent: 4135162 (1979-01-01), Takahashi
patent: 4290026 (1981-09-01), Shoji
patent: 4916408 (1990-04-01), Stefani et al.
patent: 5440273 (1995-08-01), Gusinov et al.
patent: 5510754 (1996-04-01), Moraveji et al.

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