CIRCUIT AND METHOD FOR DRIVING BULK CAPACITANCE OF AMPLIFIER INPUT TRANSISTORS
Amplifier circuitry includes an input stage having a transconductance stage including first and second input transistors (60A) and a first tail current source, gates of the first and second input transistors being coupled to first and second input signals, respectively. A bulk electrode capacitance driver (15) includes third and fourth input transistors and first and second associated cascode transistors (111A) and a second tail current source coupled to the sources and bulk electrodes of the third and fourth input transistors and to the bulk electrodes of the first and second input transistors. The gates of the third and fourth input transistors are coupled to the first and second input voltage signals, respectively, and the gates of the first and second cascode transistors are coupled to the second and first input voltage signals, respectively.