My research project investigates the design of a D/A converter (DAC) for use in an ADSL central office transceiver. The characteristics of the DAC have a major impact on the entire transceiver. This stems primarily from the echo of the transmitted signal into the local receiver through the hybrid, which affects the signal-to-noise ratio of the receiver. Tradeoffs among the digital filters, D/A interface, and reconstruction filter are studied to implement a cost-effective, high-performance ADSL DAC.
Integrated Circuits Lab
Center for Integrated Systems
Stanford University