Forwarding Signal Supply Voltage in Data Transmission System

摘要

In a data transmission system, one or more signal supply voltages for generating the signaling voltage of a signal to be transmitted are generated in a first circuit and forwarded from the first circuit to a second circuit. The second circuit may use the forwarded signal supply voltages to generate another signal to be transmitted back from the second circuit to the first circuit, thereby obviating the need to generate signal supply voltages separately in the second circuit. The first circuit may also adjust the signal supply voltages based on the signal transmitted back from the second circuit to the first circuit. The data transmission system may employ a single-ended signaling system in which the signaling voltage is referenced to a reference voltage that is a power supply voltage such as ground, shared by the first circuit and the second circuit.

主权项

1. A circuit, comprising:
one or more voltage regulators configured to generate at least one signal supply voltage; at least one terminal configured to couple the at least one signal supply voltage to a voltage forwarding mechanism, for forwarding the at least one signal supply voltage to another external circuit; and a transmitter configured to transmit a first signal having a signal swing dependent on the at least one signal supply voltage to said another external circuit via a communication link.