Alps Electric Co., Ltd.

Senichiro Yatsuda

Yasuhiro Ikarashi

Yoshitaka Hirose

A computer of the present invention contains: a CPU; plural peripheral devices controlled by the CPU; a data transmission bus between the CPU and the peripheral devices and between the peripheral devices; and a clock signal source for supplying clock signals for CPU operation and data transmission. The clock signal source contains a PLL synthesizer, and two clock signals (one for the CPU and the other for the bus) are outputted from the PLL synthesizer to stop unnecessary signals (other than the clock signals) from being produced.

Computer containing clock source using a PLL synthesizer

A clock signal supply circuit includes a sine wave oscillator and a circuit operating with an oscillation signal, as a clock signal, outputted from the sine wave oscillator, a waveform shaping circuit is provided correspondingly to the circuit, the circuit and the waveform shaping circuit are constructed in the same circuit unit, and the oscillation signal is converted into a rectangular wave by the waveform shaping circuit in the circuit unit and is supplied to the circuit.

Growing community of inventors

Fukushima-ken, Japan

Senichiro Yatsuda