Mitsubishi Denki Kabushiki Kaisha

Kokusai Denshin Denwa Co., Ltd.

Tadashi Fujino

Toshio Mizuno

Makoto Miyake

Tatsuo Watanabe

The error rate of a signal is monitored by sampling an input signal with a first clock and also with second and third clocks phase delayed in equal but opposite directions with respect to the first clock, and then logically combining the first through third sampled outputs in order to obtain an error signal.

Signal quality monitoring device

In a PSK carrier regenerating circuit, a second regeneration path is provided for regenerating a carrier which is less susceptible to cycle slip phase errors. A variable phase shifter is provided at the output of the first carrier regeneration path to selectively shift the phase thereof in accordance with a phase comparison of the first and second regenerated carriers.

Growing community of inventors

Hyogo, Japan

Tadashi Fujino