Circuits to reduce distortion in the diode-bridge track-and-hold

Circuits for reducing distortion in the diode-bridge track-and-hold are described. Adding circuits with current and voltage feedback can reduce distortion caused by the droop and nonlinear junction capacitance of a transistor. A high-speed complementary bipolar process technology is incorporated in the circuit design for its flexibility. SPICE II simulation demonstrates that the circuits reduce distortion in the diode-bridge track-and-hold by 10 to 20 dB