Matsushita Electric Industrial Co., Ltd.

Tomio Oyama

Takeji Kimura

Hiroshi Minakuchi

Haruyasu Yamada

Eiichi Tsuboka

Hiromitsu Nakano

Kazutsugu Kobayashi

Isao Yoshida

Shuzi Harada

Yoshio Tetsugu

Hirokazu Yoshino

Mitsuharu Ota

Iwajiro Sembokuya

Hideo Hozumi

A speed control system for a d-c electric motor comprising a three-terminal space control IC to provide a constant voltage source having a negative internal resistance equal in absolute value to the internal resistance of the motor and thereby render the motor rotatable at a constant controlled speed. A resistance element having a positive temperature coefficient is used as an external circuit element for the IC so that rotation speed variations relative to load torque variations will be substantially constant despite variations in the ambient temperature.

Speed control system for small size D-C electric motor

In a television receiver, a video signal for a single frame at any moment is stored in a storage tube. The stored video signal is displayed, if necessary, as a still picture on a part of the picture tube screen together with the ordinary broadcasted television picture in motion.

Television receiver with zoom storage tube frame grabber with electronic

A ghost signal cancellation system for cancelling ghost signals caused, for example, by reflection in a transmission line of television signals transmitted from a television transmitting station. This system is particularly suited for incorporation in a television receiver to improve the picture quality of a reproduced picture.

Ghost signal cancellation system

Growing community of inventors

Toyonaka, Japan

Tomio Oyama