论文信息 - Asynchronous Sigma-delta Modulator Based On The Charge Pump Integrator

Asynchronous Sigma-delta Modulator Based On The Charge Pump Integrator

The concept of the asynchronous sigma-delta modulator based on the charge pump integrator is discussed in the paper. The configurations of the charge pump either with bipolar, or with unipolar controlled current sources are presented. The benefits of a use of the charge pump to provide the integration is emphasized. The conditions for the input signal reconstruction from the time sequence on the modulator output are derived. The design of the charge-pump-based modulator model, based on classical solutions of the bipolar technology, is exemplified

D. Koscielnik | M. Miskowicz

[1] J. Das,et al. Some asynchronous pulse-modulation systems , 1967 .

[2] Marek Miśkowicz,et al. The dynamic range of timing measurements of the asynchronous Sigma-Delta modulator , 2006 .

[3] Gilles Sicard,et al. A new class of asynchronous A/D converters based on time quantization , 2003, Ninth International Symposium on Asynchronous Circuits and Systems, 2003. Proceedings..

[4] Marek Miśkowicz,et al. Bandwidth requirements for event-driven observations of continuous-time variable , 2004 .

[5] E. Roza,et al. Analog-to-digital conversion via duty-cycle modulation , 1997 .

[6] László Tóth,et al. Perfect recovery and sensitivity analysis of time encoded bandlimited signals , 2004, IEEE Transactions on Circuits and Systems I: Regular Papers.