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首页> 外文期刊>IEEE Journal of Solid-State Circuits >VERDI: an acoustically programmable and adjustable CMOS mixed-mode signal processor for hearing aid applications
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VERDI: an acoustically programmable and adjustable CMOS mixed-mode signal processor for hearing aid applications

机译：VERDI：用于助听器应用的声学可编程可调CMOS混合模式信号处理器

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摘要

A CMOS mixed-mode fully-differential signal processor (VERDI), that constitutes the core of a hearing aid system, is introduced. Its characteristics (frequency response, compression level, and output sound pressure level) are wireless controlled by means of dual tone multi-frequency (DTMF) encoded signals transmitted by an external unit. A system description is provided, and the implementation and experimental results of the key components (preamplifier, antialiasing filter, automatic gain control, filter section, output amplifier, and DTMF receiver/decoder) are covered in more detail. The circuit has been fabricated in a conventional 1.2 /spl mu/m CMOS n-well process and operates from a single 1.3 V battery, although a dc/dc converter is required. It consumes typically less than 1 mA and occupies 28 mm/sup 2/ of silicon. The dynamic range is larger than 66 dB for the maximum input signal (54 mV/sub rms/=108 dB SPL).
机译：介绍了构成助听器系统核心的CMOS混合模式全差分信号处理器（VERDI）。它的特性（频率响应，压缩级别和输出声压级别）通过外部单元发送的双音多频（DTMF）编码信号进行无线控制。提供了系统描述，并详细介绍了关键组件（前置放大器，抗混叠滤波器，自动增益控制，滤波器部分，输出放大器和DTMF接收器/解码器）的实现和实验结果。该电路采用常规的1.2μs/μlμm/ m CMOS n阱常规工艺制造，并由单个1.3 V电池供电，尽管需要dc / dc转换器。它通常消耗小于1 mA的电流，并占用28 mm / sup 2 /的硅。对于最大输入信号（54 mV / sub rms / = 108 dB SPL），动态范围大于66 dB。

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