- Tytuł:
- Design of a 3rd order 1.5-bit continuous-time (CT) sigma-delta (ΣΔ) modulator optimized for class D audio power amplifier
- Autorzy:
-
de Melo, J.
Paulino, N. - Powiązania:
- https://bibliotekanauki.pl/articles/398039.pdf
- Data publikacji:
- 2010
- Wydawca:
- Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
- Tematy:
-
czas ciągły sigma-delta(ΣΔ)
wzmacniacz klasy D
audio
Continuous-Time(CT) Sigma-Delta(ΣΔ)
class D amplifier - Opis:
- 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 architecture show that it has a maximum SNDR value of 81 dB, for a signal bandwidth of 18 kHz and a sampling frequency of 1.2 MHz. An electrical circuit is designed to implement the proposed architecture and the electrical simulations show that it has a maximum SNDR value of 76.1 dB. The influence of the constituting blocks of the circuit in the performance of the modulator is investigated using electrical simulations.
- Źródło:
-
International Journal of Microelectronics and Computer Science; 2010, 1, 2; 156-164
2080-8755
2353-9607 - Pojawia się w:
- International Journal of Microelectronics and Computer Science
- Dostawca treści:
- Biblioteka Nauki
Artykuł