Nippon Hoso' Kyokai

Kabushiki Kaisha Toshiba

Hitachi Denshi Kabushiki Kaisha

Yoshihiko Nasu

Makoto Ohnishi

Shigeo Mori

Kazuhisa Hayeiwa

Atsumi Fujiwara

Haruhiko Yura

Masaaki Ohta

Toshiaki Nario

Ikuzi Fuzitani

Tutomu Sato

The FM stereo broadcasting apparatus has a sampling frequency converter for receiving a digital input signal having an L (left audio)-signal and an R (right audio)-signal and for converting the digital input signal so that its sampling frequency is equal to either a frequency of a subcarrier of a composite audio signal or a first sampling frequency of a first sampling signal for the operation of a composite audio signal generator, a sampling signal generator for generating the first sampling signal for the operation of the composite audio signal generator having the first sampling frequency which is equal to 2.sup.N times (N is an integer of 1 or above) as high as the frequency of the subcarrier, a composite audio signal generator which is operated by the first sampling signal and which generates the composite audio signal on the basis of a pilot signal and the L-signal and R-signal of the input signal from the first frequency converter, and a frequency modulator for modulating the frequency of a carrier signal by the composite audio signal from the composite audio signal generator so as to produce a frequency-modulated signal.

FM stereo broadcasting apparatus and method

A matching circuit is connected between a source circuit and a load circuit. The matching circuit is made up of an impedance transforming circuit and a balance-to-unbalance signal-transforming circuit. If necessary, means for blocking the DC components intervene between those transforming circuits. The impedance transforming circuit is made up of inductive and capacitive elements. The matching circuit is reversible.

Matching circuit

Growing community of inventors

Tokyo, Japan

Yoshihiko Nasu