High-Speed Optoelectronic Track-and-Hold Circuits in Hybrid Signal Processors for Wideband Radar

A high-speed track-and-hold circuit based on picosecond InP optoelectronic switches has been developed with a 260-MHz analog bandwidth, 100-MHz sampling rate, and better than 0.2% accuracy. This circuit, a surface-acoustic-wave convolver, and a charge-coupled-device matrix-matrix-product chip are being incorporated in a hybrid radar signal processor for processing radar signals with bandwidths up to 200 MHz.