Semiconductor device comprising a two-stage differential amplifi

Details Semiconductor device comprising a two-stage differential amplifi Semiconductor device comprising a two-stage differential amplifi

1992-12-21

1995-02-14

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330310, H03F 345

Patent

active

053898915

ABSTRACT:
A semiconductor device comprises a two-stage differential amplifier, the amplifier comprising a first differential transistor pair whose transistors are coupled by their source electrodes and each receive an input signal, and a second differential transistor pair whose transistors are coupled by their source electrodes, each of these transistors receive the output of one of the branches of the first differential pair, and each supply an output. In the amplifier each branch of the second differential pair is arranged in series with a branch of the first differential pair so as to form two sub-circuits each including a transistor of the first pair with its load and a transistor of the second pair with its load in a manner such that the two transistors of each sub-circuit share the same current.

REFERENCES:
patent: 5057788 (1991-10-01), Ushida et al.
patent: 5068621 (1991-11-01), Hayward et al.
"Operational Amplifiers" Design and Applications, G. Graeme et al, Chapter 4.

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