High swing operational transconductance amplifier

Details High swing operational transconductance amplifier High swing operational transconductance amplifier

1993-01-05

1994-06-21

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330261, H03F 345

Patent

active

053231201

ABSTRACT:
A differential input stage for an operational transconductance amplifier is provided with complementary input transistor pairs. For each pair, a diode dummy load is provided. When the common mode input signal is near the positive or negative supply voltage, one of the pairs turns off. The diode loads act to increase the current through the other pair when this occurs. This results in the provision of a constant transconductance over the entire common mode input range.

REFERENCES:
patent: 5214329 (1993-05-01), Furino

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