Patent ID: 7500033

Claim:
A Universal Serial Bus transmitter comprising: a USBTXP input and a USBTXM input for receiving respective data signals; a transmit signal generator responsive to said USBTXP and USBTXM inputs for generating a transmit signal (USBTXIP); and a USBP driver and a USBM driver responsive to said transmit signal (USBTXIP) for applying the respective data signals to USBP and USBM wires respectively; characterised in that said transmit signal generator comprises: multiplexer means having inputs for receiving said USBTXP and a USBTXM inputs respectively and a multiplexer output; said multiplexer output being selectively responsive alternately to an asserting edge of a signal at one of said USBTXP and USBTXM inputs to define a leading edge of a transmit signal (USBTXIP) and to a corresponding de-asserting edge of a signal at the other of said USBTXP and USBTXM inputs to define the subsequent trailing edge of said transmit signal (USBTXIP).