Wide-Swing Class AB Regulated Cascode Current Mirror

A micropower regulated cascode CMOS current mirror is presented, combining floating gate and quasi floating gate MOS transistors to achieve both wide swing and class AB operation, respectively. Measurement results for a 0.5 μm CMOS test chip prototype are included, showing that the current mirror can provide a THD at 100 kHz of −44 dB for a supply voltage of ±0.75 V and input current amplitudes 20 times larger than the bias current.