Abstract
This work proposes a feed-forward PWM-intermodulated-distortion reduction (FFPIDR) technique for closed-loop class-D audio amplifiers. The proposed FFPIDR technique overcomes the trade-off between out-of-band loop attenuation and in-band loop gain to reduce the PWM-intermodulated distortion while maintaining a high in-band distortion suppression capability without increasing the switching frequency. This results in a high-fidelity and low-quiescent-current audio amplifier suitable for mobile devices. This work is implemented in a 0.5μm CMOS technology, and the measurement result with a 4.2 V supply voltage shows that the proposed FFPIDR technique improves the THD + N by 12 dB when an output power of 340 mW is delivered to an 8-Ω load. Compared with other state of the arts, the proposed class-D amplifier achieves 0.0037% THD + N with a quiescent current of 2.4 mA and the smallest chip area of 0.86mm2 and the measured peak efficiency reaches 92%.
| Original language | English |
|---|---|
| Article number | 7464812 |
| Pages (from-to) | 1436-1445 |
| Number of pages | 10 |
| Journal | IEEE Journal of Solid-State Circuits |
| Volume | 51 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2016 Jun 1 |
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All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering
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A 2.4 mA Quiescent Current, 1 W Output Power Class-D Audio Amplifier with Feed-Forward PWM-Intermodulated-Distortion Reduction. / Kuo, Tai-Haur; Chien, Shih Hsiung; Huang, Jyun Jia; Chen, Yi Wen; Lee, Yu An.
In: IEEE Journal of Solid-State Circuits, Vol. 51, No. 6, 7464812, 01.06.2016, p. 1436-1445.Research output: Contribution to journal › Article
TY - JOUR
T1 - A 2.4 mA Quiescent Current, 1 W Output Power Class-D Audio Amplifier with Feed-Forward PWM-Intermodulated-Distortion Reduction
AU - Kuo, Tai-Haur
AU - Chien, Shih Hsiung
AU - Huang, Jyun Jia
AU - Chen, Yi Wen
AU - Lee, Yu An
PY - 2016/6/1
Y1 - 2016/6/1
N2 - This work proposes a feed-forward PWM-intermodulated-distortion reduction (FFPIDR) technique for closed-loop class-D audio amplifiers. The proposed FFPIDR technique overcomes the trade-off between out-of-band loop attenuation and in-band loop gain to reduce the PWM-intermodulated distortion while maintaining a high in-band distortion suppression capability without increasing the switching frequency. This results in a high-fidelity and low-quiescent-current audio amplifier suitable for mobile devices. This work is implemented in a 0.5μm CMOS technology, and the measurement result with a 4.2 V supply voltage shows that the proposed FFPIDR technique improves the THD + N by 12 dB when an output power of 340 mW is delivered to an 8-Ω load. Compared with other state of the arts, the proposed class-D amplifier achieves 0.0037% THD + N with a quiescent current of 2.4 mA and the smallest chip area of 0.86mm2 and the measured peak efficiency reaches 92%.
AB - This work proposes a feed-forward PWM-intermodulated-distortion reduction (FFPIDR) technique for closed-loop class-D audio amplifiers. The proposed FFPIDR technique overcomes the trade-off between out-of-band loop attenuation and in-band loop gain to reduce the PWM-intermodulated distortion while maintaining a high in-band distortion suppression capability without increasing the switching frequency. This results in a high-fidelity and low-quiescent-current audio amplifier suitable for mobile devices. This work is implemented in a 0.5μm CMOS technology, and the measurement result with a 4.2 V supply voltage shows that the proposed FFPIDR technique improves the THD + N by 12 dB when an output power of 340 mW is delivered to an 8-Ω load. Compared with other state of the arts, the proposed class-D amplifier achieves 0.0037% THD + N with a quiescent current of 2.4 mA and the smallest chip area of 0.86mm2 and the measured peak efficiency reaches 92%.
UR - http://www.scopus.com/inward/record.url?scp=84966389720&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84966389720&partnerID=8YFLogxK
U2 - 10.1109/JSSC.2016.2543704
DO - 10.1109/JSSC.2016.2543704
M3 - Article
AN - SCOPUS:84966389720
VL - 51
SP - 1436
EP - 1445
JO - IEEE Journal of Solid-State Circuits
JF - IEEE Journal of Solid-State Circuits
SN - 0018-9200
IS - 6
M1 - 7464812
ER -