Abstract
This paper presents a 3rd order 1.5-bit ΣΔ modulator with distributed feedback and local resonator feedback for a Class D audio amplifier. In order to improve the signal-to-noise-and-distortion ratio (SNDR), without increasing the oversampling ratio (OSR) or the order of the modulator, the modulator uses transmission zeros and 1.5-bit quantization. High level simulations of the modulator show that it has a maximum SNDR value of 82.4 dB and a dynamic range (DR) of 76 dB, for a signal bandwidth of 18 kHz and a sampling frequency of 1.2 MHz. The use of a full-bridge output stage allows 1.5-bit quantization.
| Original language | Unknown |
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| Title of host publication | - |
| Pages | 531 - 535 |
| Publication status | Published - 1 Jan 2010 |
| Event | Mixed Design of Integrated Circuits and Systems (MIXDES), 2010 Proceedings of the 17th International Conference - Duration: 1 Jan 2010 → … |
Conference
| Conference | Mixed Design of Integrated Circuits and Systems (MIXDES), 2010 Proceedings of the 17th International Conference |
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| Period | 1/01/10 → … |