Patent ID: 7616056

Claim:
An operational transconductance amplifier (OTA) for receiving the first and the second input voltages and outputting the first and the second output currents proportional to a voltage difference between the first and the second input voltages, the amplifier comprising: the first parallel converting cell having a positive input terminal for receiving the first input voltage and a negative input terminal for receiving the second input voltage; the second parallel converting cell having a positive input terminal for receiving the second input voltage and a negative input terminal for receiving the first input voltage; the first cross feedback converting cell having a positive input terminal connected to an output terminal of the second parallel converting cell, a negative input terminal connected to a ground voltage terminal, and an output terminal connected to an output terminal of the first parallel converting cell; and the second cross feedback converting cell having a positive input terminal connected to the output terminal of the first parallel converting cell, a negative input terminal connected to the ground voltage terminal, and an output terminal connected to the output terminal of the second parallel converting cell.