Use of dynamic element matching in a multi-path sigma-delta modulator

This paper describes the use of dynamic element matching in a multi-bit, multi-path sigma-delta modulators. The technique achieves noise shaping and enables the use of elements with 0.5% mismatch. Simulation results at the behavioral and gate level shows the possibility to achieve an SNR as large as 85 dB and SFDR of 90 dB with a 320 MHz equivalent clock frequency.