ELECTRIC SIGNAL CIRCUIT AND FM DEMODULATOR USING THE SAME

摘要

PROBLEM TO BE SOLVED: To propose an electric signal circuit and an FM demodulator using the same in which a group delay slope can be set using a small-scaled circuit.

SOLUTION: There is provided the electric signal circuit or the FM demodulator equipped with a first high-frequency device which outputs electric signals where a plurality of frequencies is multiplexed, a transmission line which propagates the electric signals, a second high-frequency device connected with the transmission line, and a parallel resistor parallel-connected with an input section of the second high-frequency device at a boundary between the transmission line and the second high-frequency device. A characteristic impedance of the transmission line is made to differ from an output impedance of the first high-frequency device to provide a frequency dependency of the group delay slope, in the electric signals with a slope by means of a resistance value of the parallel resistor.

COPYRIGHT: (C)2008,JPO&INPIT