Bus circuit which prevents current from flowing from a power supply of one circuit to a power supply of another circuit for a predetermined period

Abstract

A bus circuit of the present invention includes a first circuit connected to a first power supply, a second circuit connected to a second power supply, a transmission line which connects the first and second circuits and a third circuit. The third circuit prevents current from flowing between the first and second power supplies through the transmission line for a predetermined period after the first power supply is applied. Another bus circuit of the present invention includes a transmission line, a first circuit which is connected to a first power supply and outputs a signal to the transmission line, a second circuit which is connected to a second power supply and receives the signal output by the first circuit through the transmission line, and a third circuit which is provided between the transmission line and the first circuit and which prevents the signal from transmitting from the first circuit to the transmission line for a predetermined period after the first power supply is applied. Yet another bus circuit of the present invention includes a transmission line, an first circuit includes an output terminal connected to the transmission line and a path which is formed between a first power supply and the output terminal and is used for outputting a high-level logic signal to the transmission line, wherein the output circuit prevents current from flowing on the path for a predetermined period after the first power supply is applied; and a second circuit connected to a second power supply and connected to the output terminal of the first circuit through the transmission line.

Dependencies are inferred from the claim text.