Patent ID: 8063504
Filing Date: 2011-11-22
Classification: H04L

Abstract:
1. An electronic circuit comprising: transmission line driver circuitry coupled with a transmission line, the transmission line coupled with a first power supply through an impedance; digital data circuitry coupled with the transmission line driver circuitry and configured to transmit data over the transmission line using the transmission line driver circuitry, the digital data circuitry configured to receive power from a second power supply; current regulator circuitry coupled with the transmission line driver circuitry and configured to regulate a current received from the first power supply through the transmission line driver circuitry to be approximately constant; and voltage regulator circuitry coupled with the current regulator circuitry and configured to provide the second power supply having an approximately constant voltage, the second power supply supplying current received from the first power supply through the current regulator circuitry to at least the digital data circuitry.