Assume that a threshold voltage difference of 10 mV exists between the two MOSFETs used in a simple current mirror made using equal size MOSFETs. Calculate the difference in the drain currents to change with the MOSFET VGS? Is matching between the currents better or worse with large VGS? what happens to the minimum voltage across the current mirror if VGS is increased ?

(20.14) Assume that a threshold voltage difference of 10 mV exists between the two MOSFETs used in a simple current mirror made using equal size MOSFETS. Calculate the difference in the drain currents to change with the MOSFET VGS ? Is matching between the currents better or worse with large VGs ? what happens to the minimum voltage across the current mirror if VGs is increased ?