HIGH-SPEED SWITCHING CIRCUIT

摘要

A high-speed switching circuit which operates at speed exceeding 20 GHz. High-speed light-activated switches (PSW1, PSW2) controlled by light are connected with a plurality of input terminals (Din1, Din2), and their outputs are connected commonly with one output terminal (Dout). Alternatively, the high-speed switches (PSW1, PSW2) are connected commonly with one input terminal (Din), and their outputs are connected with the output terminals (Dout1, Dout2), respectively. Multiphase pulses are supplied to the same number of light-emitting elements (LD1, LD2) as the high-speed switches so that they sequentially emit light while the corresponding high-speed switches sequentially turn on. As a result, signals from a plurality of input terminals produce a single high-speed output signal at the input frequency multiplied by the number of switches at a common output terminal, or otherwise a high-speed signal to a common input terminal produces a plurality of low-speed output signals at the input frequency divided by the number of switches at a plurality of output terminals.