Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Electric Engineering Company, Limited

Other

Toppan Printing Co., Ltd.

Kabushiki Kaisha Topcon

Yasuhiro Okazaki

Yoshiji Inoue

Takehiko Umeyama

Hiroshi Murakami

Naohisa Goto

Makoto Ando

Tsuyoshi Horiuchi

In a magnetic recording writing circuit, a current having a higher level than a write current is supplied for a period of time during rise and fall of the write current, and a current having a lower level than the write current is supplied for a period of time during overshoot at the rise and fall of the write current. Accordingly, the write current can recover quickly from overshoot.

Magnetic recording writing circuit

A comparator compares phases of an input data supplied from an input terminal and a synchronizing clock signal output by a variable counter, and outputting a comparison result signal indicative of any of a 'lead', a 'lag' and a 'non-detection' of the edge of the input data with respect to the up edge of the synchronizing clock signal. A state detector circuit detects the numbers of 'leads' and 'lags' in comparison result signals output by the comparator, and outputting a state detected signal indicative of any of 'the number of leads is larger', 'the number of lags is larger' and 'the number of leads is equal to the number of lags'. A dividing ratio selection circuit outputs a dividing ratio signal indicative of any of a 'dividing ratio smaller than a reference dividing ratio', a 'dividing ratio greater than the reference dividing ratio' and the 'reference dividing ratio', based on the comparison result signals output by the comparator and state detected signals output by the state detector circuit. A variable counter divides the frequency of a reference clock signal in response to the dividing ratio signal output by the dividing ratio selection circuit and outputs the result of the division to the comparator and an output terminal.

Clock signal generator and data signal generator

A switching circuit operable under a low voltage power source includes first and second level shift circuits. The level shift circuits receive a switching control signal and generate an internal switching signal and an inverted internal switching signal. The level shift circuits supply the internal switching signals to switching elements. A switched capacitor filter includes an amplifier and the described switching circuit. The amplifier has amplification inverters connected in series in three stages.

Switching circuit and switched capacitor

Polarization-universal radial line slot antenna

An ophthalmic instrument provided with an eye fundus measuring portion 1 for finding a position of the eye fundus of a patient's eye includes a transducer 11 for outputting a heartbeat signal corresponding to the heartbeat of a patient, a vital signal generating circuit 13, a synchronizing circuit 14, and a timer 16 each for actuating the eye fundus measuring portion 1 synchronously with the heartbeat signal.

Ophthalmic instrument

Growing community of inventors

Tokyo, Japan

Yasuhiro Okazaki