Kabushiki Kaisha Toshiba

Shinichi Hasebe

Masahiro Abe

Masayuki Sasaki

Hiroo Nakano

A receiving large scale integrated circuit (LSI) device, including a demodulator which includes two signal processing circuits to demodulate two diversity signals to form a demodulated signal, a decoder which decodes the demodulated signal in accordance with an error correcting code to form a decoded signal, a receiving quality judgment circuit which codes the decoded signal to form a re-coded signal as a reference signal, compares the demodulated signal with the reference signal to obtain an error rate of the two diversity signals and supplies a judgment signal depending on the error rate, and a control circuit which selects one of the two signal processing circuits or both two signal processing circuits in response to the judgment signal of the receiving quality judgment circuit and stops supplying electric power or a clock signal to the one of the two processing circuits not selected by the control circuit.

Receiving LSI device and receiver using the same

When a reset signal /RESET is 'L', a flip-flop circuit holds '1'; on the other hand, a flip-flop circuit holds &#x201c;0&#x201d;. When the reset signal /RESET becomes &#x201c;H&#x201d;, the flip-flop circuits captures data in synchronous with a clock signal. When a power supply voltage returns to the initial value after an instantaneous blackout occurs, the data of the flip-flop circuits have the same value. An output signal of an exclusive-OR gate circuit becomes &#x201c;L&#x201d;, the output is held in a flip-flop circuit. As a result, an instantaneous blackout detection signal becomes &#x201c;H&#x201d;.

Multi-function IC card

In at least one of a plurality of shutter vanes forming a shutter there are provided a plurality of openings adapted to detect the movement of the shutter vanes. A photointerrupter is turned on and off by the openings when the shutter vanes move. An output voltage of the photointerrupter is compared with a reference voltage by a comparator. A series combination of a switch, which is turned on and off by the output voltage of the comparator, and a resistor is connected between the output of the photointerrupter and ground. The output signal of the comparator is delayed. The delayed version and the output signal of the comparator are exclusive ORed to produce a train of pulses corresponding to the openings as the shutter vanes move. A drive and control section is responsive to the count of the pulses to control the operation of the shutter.

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Saitama-ken, Japan

Shinichi Hasebe