Victor Company of Japan, Limited

Tatsuo Sawada

Yasuo Itoh

Nobuaki Takahashi

Shinji Nakamura

Yoshiki Iwasaki

Kazunori Nishikawa

Yasuhisa Okabe

Masaaki Satoh

Katsuhiro Ohba

Hideaki Ozaki

Nobuhide Ohsaki

Nobuaki Suda

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

Tatsuo Sawada