A fully differential CMOS transresistance amplifier using cascode regulation for realizing low input impedance is presented. Fabricated in 0.5-/spl mu/m CMOS, for a closed-loop transresistance of 30 k/spl Omega/, the amplifier has a measured 3-dB bandwidth of 7.5 MHz, SNR of 58 dB, and SFDR of 66 dB for a 600mV/sub p-p/ output swing. Operating at a 3V supply, the amplifier dissipates 1.47 mW.
['Arun Ravindran', 'Srikanth S. Mohan']
A low input impedance fully differential CMOS transresistance amplifier using cascode regulation