Teac Corporation

Hiroomi Watanabe

Katsuya Enami

Minoru Minase

Susumu Niinuma

Shigeki Fujii

Yuuki Suzuki

A CD-R drive has two USB ports. One USB port is connected as an ordinary interface port to a host computer by a USB cable, and the other USB port is connected as an assist power supply port to the host computer by another USB cable. With this arrangement, the CD-R drive can operate with maximum current consumption of 1.0 A without using a separate AC power supply adapter because each USB port allows passage of 500 mA of current at maximum.

Electronic device with plural interface ports wherein one of the interface ports is used as an assist power supply port

An electric appliance monitoring system that can report an operational state of an electric appliance includes a monitoring part and a transmission part. The monitoring part monitors the operational state of the electric appliance and outputs a detection signal to the transmission part. The transmission part transmits a signal corresponding to the detection signal output from the monitoring part.

Electric appliance monitoring system

A CD-ROM drive ( ) is disclosed which has a safety circuit ( ). The safety circuit ( ) includes a NOR gate ( ) having one input connected to a disk motor drive control signal terminal ( ) of a system controller ( ), and another input connected to the output (P ) of a sensor ( ). The system controller ( ) puts out a signal that goes low for activating a motor ( ) and high for inactivating the same. The motor ( ) is set into rotation when the NOR gate ( ) is high, and out of rotation when the NOR gate is low. When the sensor ( ) is high, however, the NOR gate ( ) goes low, stopping the motor ( ), regardless of the other input to the NOR gate from the system controller ( ).

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Iruma, Japan

Hiroomi Watanabe