Victor Company of Japan, Limited

Hideaki Ozaki

Yasuo Itoh

Nobuaki Takahashi

Shinji Nakamura

Yoshiki Iwasaki

Kazunori Nishikawa

Yasuhisa Okabe

Masaaki Satoh

Katsuhiro Ohba

Nobuaki Suda

Tatsuo Sawada

Nobuhide Ohsaki

Yukinobu Ishigaki

Apparatus for automatic selective switching and transmitting of input signals in which switching circuits are provided for respective transmitting systems of a plurality of input signals. The switching circuits undergo opening and closing operations to carry out non-transmitting and transmitting of signals. Input signal detection circuits are supplied with said input signals and detect the same to produce detected signals. A circuit for forming control signals is supplied with the detected signals and forms control signals for closing the switching circuit provided for the transmitting system of an input signal which has arrived and causes the switching circuits of the other transmitting systems to open or to remain opened.

Apparatus for automatic selective switching and transmission of input

An angle modulated wave demodulation system demodulates an input angle modulated wave by means of a phase locked loop system which comprises a phase comparator, which is operated responsive to an input angle modulated wave. A voltage controlled oscillator is supplied with a part of the output of the phase comparator which controls its oscillation frequency. The oscillator supplies its oscillation frequency to the phase comparator. The phase locked loop system has a lock frequency range which decreases its width when the level of the input angle modulated wave is below a predetermined level. The portion of this lock range in which the width of the lock range decreases is positively utilized. The voltage controlled oscillator oscillates at a frequency equal to the center frequency of the carrier of the input angle modulated wave, when the phase locked loop becomes unlocked.

Angle modulated wave demodulation system

Growing community of inventors

Sagamihara, Japan

Hideaki Ozaki