HYBRID CIRCUIT USING RESISTOR

摘要

In order to accurately extract only a reception signal from signals in a transmission path where a transmission signal is superimposed on a reception signal without using a replica driver in, for example, a bidirectional high-speed data transmission system of 1 Gb/s or above, a hybrid circuit includes: a resistor serially inserted between an output driver for transmitting a signal and a transmission path; and a reception signal extraction unit for extracting only a reception signal from the signals in the transmission path by using a signal obtained at both ends of the resistor. The reception signal extraction unit is formed by, for example, two trans-conductance amplifiers for converting input voltage into current and a load resistor to which current outputted from the two amplifiers is fed.