Regulated cascode current mirror scheme for transconductance amplifiers

摘要

There is described an amplification stage comprising: a current mirror circuit comprising a reference transistor arranged to receive a current associated with an input signal and an output transistor providing a current source for an output signal line; a current sink to the output signal line, under the control of the input signal; circuitry arranged to maintain equality between the drain/collector voltages on the transistors of the current mirror circuit.