Class-D Audio Amplifier Using 1-Bit Fourth-Order Delta-Sigma Modulation

Title
Class-D Audio Amplifier Using 1-Bit Fourth-Order Delta-Sigma Modulation
Author
이성준
Keywords
Class-D amplifier; delta-sigma (ΔΣ) modulator; power switching; pulsewidth modulation (PWM); signal-to-noise ratio (SNR); total harmonic distortion plus noise (THD+N)
Issue Date
2008-08
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Citation
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS, v. 55, No. 8, Page. 728-732
Abstract
We present the design of a single-chip delta-sigma (DeltaSigma) modulation-based class-D amplifier for driving headphones in portable audio applications. The presented class-D amplifier generates output pulse signals using a single-bit fourth-order high-performance DeltaSigma modulator. To achieve a high signal-to-noise ratio and ensure system stability for a large input range, the locations of the modulator loop filter poles and zeros are optimized and thoroughly simulated. The test chip is fabricated using a standard 0.18-mum CMOS process. The active area of the chip is 1.6 mm2. It operates for the signal bandwidth from 20 Hz to 20 kHz. The measured total harmonic distortion plus noise at the 32-Omega load terminal is 0.022% from a single 3-V power supply.
URI
https://ieeexplore.ieee.org/document/4570198http://repository.hanyang.ac.kr/handle/20.500.11754/80647
ISSN
1549-7747
DOI
10.1109/TCSII.2008.922457
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > INTEGRATIVE ENGINEERING(융합공학과) > Articles
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