Patent ID: 8340624
Filing Date: 2012-12-25
Classification: H04L

Abstract:
1. A reception processing apparatus disposed in a first communication apparatus, the first communication apparatus being electrically connected to a second communication apparatus via a communication bus so as to constitute a communication system where digital data is communicable between the first communication apparatus and the second communication apparatus via the communication bus, the first communication apparatus being powered by a constant voltage source of which output voltage being constant with time and the second communication apparatus being powered by a direct current (DC) power source of which output voltage varies with time, the reception processing apparatus comprising: an input circuit connected to the communication bus, the communication bus being electrically connected to the DC power source to be pulled up to the output voltage thereof, whereby a voltage signal at the communication bus is generated from the DC power source, the input circuit receiving the voltage signal from the communication bus; a processing circuit connected to the input circuit, processing the voltage signal received from the input circuit to generate a threshold voltage; and a converting circuit connected to the processing circuit, receiving the voltage signal from the communication bus, comparing the voltage signal with the threshold voltage generated by the processing circuit thereby converting the voltage signal into the digital data having high and low voltage levels, wherein the processing circuit includes i) dividing section for dividing the voltage signal with a predetermined division ratio and ii) holding section for holding a peak value of the voltage signal.