Semiconductor integrated circuit device provided with a differen

Details Semiconductor integrated circuit device provided with a differen Semiconductor integrated circuit device provided with a differen

1998-02-26

2000-03-07

Pascal, Robert

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330261, 330307, H03F 345, H03F 314

Patent

active

060345675

ABSTRACT:
A differential amplifier comprises an n-channel MOS transistor to the gate of which an input voltage VIN1 is fed, and an n-channel MOS transistor to the gate of which an input voltage VIN2 is fed. A p-channel MOS transistor arranged in such a manner that, to the source thereof, a power source voltage Vcc is fed, and the gate and drain thereof are connected to the drain of the MOS transistor, and a p-channel MOS transistor arranged in such a manner that the gate thereof is connected to the drain of the MOS transistor, the drain thereof is connected to the drain of the MOS transistor, and the voltage at this drain is outputted as an output voltage VOUT, and the output current I of a constant-current source is set so that the transistors constituting a differential amplifier may operate in a weak inversion zone.

REFERENCES:
patent: 4458212 (1984-07-01), Brehmer et al.
patent: 4524328 (1985-06-01), Abou et al.
patent: 4893092 (1990-01-01), Okamoto
patent: 5789980 (1998-08-01), Nagata et al.
patent: 5812022 (1998-09-01), Hirano et al.

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