A compact cap-free headphone driver

• Autorzy: Wang H. , Zhang B. , Sun J.

Warianty tytułu

PL

Kompaktowy, bezkondensatorowy sterownik słuchawek

• Języki publikacji: EN

Abstrakty

EN

This paper proposes a compact structure to generate high rejection power supplies for proposed class AB amplifier (abamp). A NMOSbased low drop out regulator that does not require external compensation is utilized to provide a positive power supply. A regulated negative charge pump is utilized to provide a negative power supply. Chopper technology is utilized in the abamp to lower noise and offset. The driver could provide high power supply rejection (88dB at 217 Hz), high fidelity (74 dB total harmonic plus noise), low noise (7 μV) and low offset (1 mV) audio signals.

PL

W artykule zaproponowano kompaktową strukturę zasilacza ze sterownikiem o wysokiej skuteczności eliminacji szumów. W zasilaczu zastosowano tranzystor typu NMOS i sterowaną przetwornicę napięcia oraz chopper w celu redukcji szumów oraz offset-u.

Słowa kluczowe

EN

Headphone driver; NMOS LDO; negative charge pump; chopper

PL

sterownik słuchawek; NMOS LDO; przetwornica napięcia; chopper

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Przegląd Elektrotechniczny
• Rocznik: 2012
• Tom: R. 88, nr 12a
• Strony: 333--337
• Opis fizyczny: Bibliogr. 12 poz., rys.

Twórcy

autor

Wang H.

autor

Zhang B.

autor

Sun J.

• University of Electronic Science and Technology of China, Chengdu, 610054, China,

Bibliografia

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• [2] Alex Lollio, Giacomino Bollati, Rinaldo Castello, A class-G headphone amplifier in 65 nm CMOS technology, IEEE Journal of solid-state circuits, 45 (2010), No.12, 2530-2542
• [3] Xavier, B., Bruno, A., Lin-Shi Xuefang, Solutions of DC-DC converters for G-class audio amplifiers in mobile platforms, Proceedings of the 2011-14th European Conference on Power Electronics and Applications (EPE 2011), 2011, 1-9
• [4] Tong Ge, Chang J. S., Bang-Bang Control Class-D Amplifiers: Power-Supply Noise, IEEE transaction on Circuits and Systems II: Express briefs, 55(2008), No. 8, 723-727
• [5] P. Gray, P. J. Hurst, S. H. Lewis, and R. G. Meyer, Analysis and design of analog integrated circuits, 4th ed. New York: Wiley, 2001, 434-439
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• [7] Huffenus A., Pillonnet G., Abouchi N., A class D headphone amplifier with DC coupled outputs and 1.2mA quiescent current, 2011 IEEE 9th International new circuits and systems conference (NEWCAS), 2011, 281 - 284
• [8] Giustolisi G., Palumbo G., Dynamic-biased capacitor-free NMOS LDO, Electronics Letters, 45(2009), No. 22 ,1140-1141
• [9] Kruiskamp W., Beumer R., Low drop-out voltage regulator with full on-chip capacitance for slot-based operation, 34th European Digital Object Solid-State Circuits Conference, 2008 , 346 -349
• [10] Bakker A., Thiele K., Huijsing J.H., A CMOS nested-chopper instrumentation amplifier with 100-nV offset, IEEE Journal of Solid-State Circuits, 35(2000), No. 12, 1877 - 1883
• [11] Juanda, Wei Shu, Chang J., A 15nV/√Hz noise 0.2μV offset chopper conditioning amplifier for monolithic infrared sensing systems, 13th International Symposium on Integrated Circuits (ISIC), 2011, 368 - 371
• [12] Kyehyung Lee, Qingdong Meng, Sugimoto T., A 0.8 V, 2.6 mW, 88 dB dual-channel audio delta-sigma D/A converter with headphone driver, IEEE Journal of Solid-State Circuits, 44(2009), No.3, 916 - 927