MITE circuits: The continuous-time counterpart to switched-capacitor circuits

Some new applications of a family of circuits using op-amps built with mult iple-input translinear elements (MITE) circuits are discussed, These includ e weighted average circuits for resistive networks, defuzzifiers, FIRs, com mon-mode feedback networks, sigma-delta modulators, and fast digital conver ters (digital-analog and analog-digital). Some aspects of MITE circuits not reported before are discussed like gain-bandwidth tradeoffs and an analysi s showing that the behavior of closed-loop MITE circuits is determined by a ccurately controllable capacitance ratios; to a first-order approximation i t is not affected by the parasitic capacitances of the MOS transistor. From this point of view MITE circuits are considered here as the continuous-tim e counterpart to switched-capacitor circuits. Experimental results of two t est chip prototypes are shown.