Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Tsuyoshi Hiraki

Toru Iwata

Yoshihide Komatsu

Shinya Miyazaki

Tsuyoshi Ebuchi

Yuji Yamada

Kiyotaka Tanaka

Kouichi Komawaki

Kazumasa Tarutani

Tomoaki Okumura

An interchannel skew adjustment circuit adjusts signal skew between a first channel and a second channel. The circuit includes a phase adjustment circuit configured to receive a signal of the first channel, delay the signal by a discretely variable delay amount, and output a delayed signal; a channel coupling circuit configured to receive the signal output from the phase adjustment circuit and a signal of the second channel, and detect a phase difference between these two signals; and a controller configured to control the delay amount in the phase adjustment circuit based on a result detected by the channel coupling circuit. This interchannel skew adjustment circuit adjusts the interchannel signal skew only at a sender or a receiver, thereby reducing the circuit area and the power consumption.

Interchannel skew adjustment circuit

An information recording system for recording information on an optical disc using a reference clock signal generated based on a push-pull signal including a wobble frequency component, the system includes an amplitude obtaining unit for obtaining an amplitude value of the push-pull signal, a threshold calculation unit for calculating a displacement threshold of the push-pull signal based on the amplitude value obtained by the amplitude obtaining unit, and a noise reduction unit for generating a corrected push-pull signal by correcting the push-pull signal such that a displacement exceeding the displacement threshold is reduced. The reference clock signal is generated based on the corrected push-pull signal generated by the noise reduction unit.

Information recording system and an information recording method

Growing community of inventors

Osaka, Japan

Tsuyoshi Hiraki