Operational transconductance amplifier with good linearity

Details Operational transconductance amplifier with good linearity Operational transconductance amplifier with good linearity

1995-12-28

1997-12-30

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including field effect transistor

330253, H03F 316, H03F 345

Patent

active

057035342

ABSTRACT:
An operational transconductance amplifier with a good linearity, comprising a first MOS transistor having its one terminal connected to a ground voltage source and its gate terminal for receiving a circuit input voltage, a second MOS transistor having its one terminal connected to the other terminal of the first MOS transistor and its other terminal connected to a supply voltage source, a reference voltage generator for generating a reference voltage, and an operational amplifier having its negative input terminal connected to a junction between the first and second MOS transistors, its positive input terminal connected to an output terminal of the reference voltage generator and its output terminal connected to a gate terminal of the second MOS transistor. The first MOS transistor acts to convert the input voltage into an output current. The second MOS transistor acts to transfer current flowing through the first MOS transistor to its output terminal.

REFERENCES:
patent: 4583037 (1986-04-01), Sooch
patent: 5039954 (1991-08-01), Bult et al.

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