← 返回 JSSC 论文列表JSSC 2013第2期Data Converters0.13μmDelta-Sigma ADCDAC
AC l a s s - DA m p l ifier With Pulse Code Modulated PCM Digital Input for Digit
开发了一种用于低功耗数字助听器的PCM数字输入D类放大器。
0.13μm CMOS, 1.2V, 80.6dB SNDR, 87dB DR, 97%效率
D类放大器PCMΣ-Δ调制器低功耗数字助听器
▸采用三阶数字Σ-Δ调制器进行噪声整形
▸使用连续时间积分器实现反馈路径
▸结合开关电容电路和连续时间积分器优化频率响应
Abstract
Ac l a s s - Da m p l ifier with pulse code modulated (PCM)
digital input is developed for a low-power digital hearing aid. A
16-bit 40-kbps PCM digital input is noise-shaped by a third-order
digital sigma-delta modulator (SDM) which provides 1.5-bit dig-
ital output. The 1.5-bit digital output of the digital SDM is con-
verted to a three-level analog signal by a simple digital-to-analog
converter (DAC) and then applied to an analog SDM. The analog
SDM provides pulse density modulated (PDM) signa