Patent ID: 7911276

Claim:
A transconductor circuit, comprising a first input node for receiving a first input signal of the transconductor circuit and a second input node for receiving a second input signal of the transconductor circuit; at least a first amplifier, a second amplifier, and a first, second, and third resistor, each of the first and second amplifiers comprises an input stage having a combination of at least a transistor of the MOS type and a transistor of the bipolar type, and an output stage for providing a respective output signal of the transconductor circuit and having at least a transistor of the bipolar type, wherein the input stage of the first amplifier is coupled to the first input node and the input stage of the second amplifier is coupled to the second input node, the output stages of the first and second amplifiers are coupled with each other through at least the first resistor to form a differential amplifier; and wherein the differential amplifier is biased by the second and third resistors, with one of the second and third resistors coupled to one end of the first resistor and the other of the second and third resistors coupled to the other end of the first resistor.