This paper focuses on the topic of ∑Δ modulators stability and saturation recovery for high-order Switched Capacitor (SC) structures. A technique, which allows a fast recover of the modulator from instability (<300ns) and guarantees a minimum of 20dB SNR also when the architecture gets unstable, is proposed. This technique is based on two steps: (1) instability detection with systenz recovery and (2) digital post-processing. This strategy has been applied to a 6th-order SC bandpass ∑Δ modulator operating at 42.8MHz with 74dB Dynamic Range (DR). The proposal is vuliduted by extended experimental results. © 2001 IEEE.
Cusinato, P., Pasolini, F., Stefani, F., Baschirotto, A. (2001). Saturation recovery technique for high-order bandpass switched capacitor ∑Δ modulators. In Proceedings of the IEEE International Conference on Electronics, Circuits, and Systems (pp.1085-1088). IEEE [10.1109/ICECS.2001.957688].
Saturation recovery technique for high-order bandpass switched capacitor ∑Δ modulators
Baschirotto, A
2001
Abstract
This paper focuses on the topic of ∑Δ modulators stability and saturation recovery for high-order Switched Capacitor (SC) structures. A technique, which allows a fast recover of the modulator from instability (<300ns) and guarantees a minimum of 20dB SNR also when the architecture gets unstable, is proposed. This technique is based on two steps: (1) instability detection with systenz recovery and (2) digital post-processing. This strategy has been applied to a 6th-order SC bandpass ∑Δ modulator operating at 42.8MHz with 74dB Dynamic Range (DR). The proposal is vuliduted by extended experimental results. © 2001 IEEE.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.