Mitsubishi Denki Kabushiki Kaisha

Kabushiki Kaisha Toshiba

Satoshi Kunugi

Yukio Ikeda

Masatoshi Nakayama

Yuji Sakai

Kenichi Horiguchi

Haruyasu Senda

Kazuyuki Totani

A dividerfor dividing and distributing a high-frequency signal input from an input terminalto two output sides, a main amplifying unit, connected to one output side of the divider, for amplifying one high-frequency signal output from the divider, a subsidiary amplifying unit, connected to the other output side of the divider, for performing no operation in case of a low instantaneous electric power of the other high-frequency signal output from the dividerand amplifying the other high-frequency signal in case of a high instantaneous electric power of the other high-frequency signal and a circulatorfor injecting the high-frequency signal amplified in the subsidiary amplifying unitinto the output side of the main amplifying unitand injecting the high-frequency signal amplified in the main amplifying unitinto an output terminalare arranged.

High-frequency amplifier, feed-forward amplifier and distortion compensating amplifier

A feedforward amplifier combines an input signal combined by a first error rejection loop with an error component and a first pilot signal detected by a second error detection loop, thereby canceling out the error component and the first pilot signal residual in the input signal.

Feedforward amplifier

An operator designates an image of equipment or a device using a pointing device and touch coordinate detector which detects touch coordinates of the designated equipment or device on a graphic screen. A specifier compares the display coordinates on the image of each equipment or device sent from a display coordinate detector to the touch coordinates on the graphic screen output from the touch coordinate detector and outputs data specifying the equipment or device touched by the operator to a camera switching section. The camera switching section switches from a plant equipment and device monitor camera to an operating board monitor camera. The image of the operating board is displayed in a window in a predetermined area on the graphic screen. A CRT display controller causes an operating window to be displayed for the specified equipment or device displayed in a window on the CRT display unit. The operator manipulates the plant equipment and devices on the operating window corresponding to the operating board displayed on the display unit. Data indicating any specific operation is sent to a controller through an output data transmitter together with data representing the equipment or device specified by the pointing device to thereby control the specified equipment or device.

Monitor control apparatus

Growing community of inventors

Tokyo, Japan

Satoshi Kunugi