Abstract:
This paper introduces a continuous-time low-pass sigma-delta modulator operating with a seven-phase 400Metadata
Abstract:
This paper introduces a continuous-time low-pass sigma-delta modulator operating with a seven-phase 400 MHz clocking scheme to control time-based processing in the 3-bit two-step quantizer and main digital-to-analog converter (DAC). An on-chip voltage-controlled oscillator and a complementary injection-locked frequency divider are utilized for low-jitter clock signal generation with multiple phases, allowing 3-bit pulse-width modulated feedback with a single-element DAC to avoid performance degradation from unit element mismatch problems associated with conventional multi-bit DACs.
Published in: IEEE Journal of Solid-State Circuits ( Volume: 45, Issue: 9, September 2010)