Patent ID: 7984213

Claim:
A control device for a Universal Serial Bus (USB) interface that includes a first terminal configured to input data to be transmitted and a second terminal configured to transmit packet data on a bus, said packet data including an end-of-packet signal, said USB interface including a transmission circuit configured to transmit the packet data on said second terminal, said USB interface being configured to receive as an input an activation signal for the activation of said transmission circuit when data are received from said first terminal, said transmission circuit including a bias circuit, the control device comprising: a detection circuit configured to detect an end-of-packet signal on said bus; and a control circuit configured to activate the bias circuit of the transmission circuit if said end-of-packet signal is detected by said detection circuit, wherein the control circuit includes: a flip-flop having first and second inputs and an output, the first input being coupled to an output of the detection circuit; a counter having an input, coupled to the output of the flip-flop, and an output; and a logic gate having first and second inputs and an output, the first input of the logic gate being coupled to an output of the counter, the second input of the logic gate being configured to receive the activation signal, and the output of the logic gate being coupled to the second input of the flip-flop.