A high speed, high resolution, low voltage current mode sample and hold

A low voltage current mode sample and hold (S/H) in 0.18 /spl mu/m technology with 1.5 V supply voltage is presented. This S/H has 12-bit linearity, i.e., gain and nonlinearity errors of S/H are less than 0.02 /spl mu/A for 100 /spl mu/A input current. Maximum sampling rate for this structure is 100 MHz (using double sampling technique).