Information is supplied to a bus in a wired logic function, the potential on the bus either being pulled down to ground level or remaining at supply level. The data line in a bus is split into two parts which are interconnected via the main current channel a transistor. Different supply voltages...http://www.google.es/patents/US5689196?utm_source=gb-gplus-sharePatente US5689196 - Circuit comprising a data communication bus
