精品文档---下载后可任意编辑CMOS 全差分 12 位逐次逼近式模数转换器的开题报告摘要：本文提出了一种全差分 12 位逐次逼近式模数转换器(CMOS ADC)，采纳逐次逼近式的转换方式和 PWM 调制技术实现，能够在低功耗和低成本的情况下实现高精度模数转换。全文分为五部分：引言、基础知识、设计原理、实现步骤和结论。引言介绍了 CMOS ADC 的背景、意义和应用前景。基础知识部分先介绍了模数转换的种类和工作原理，然后介绍了逐次逼近式模数转换器的基本原理。接下来的设计原理部分详细阐述了设计方案的基本思路和实现方法，包括采样电路、比较器、引导逻辑、DAC 电路以及 PWM 调制等。实现步骤部分介绍了具体实现的步骤和结果分析。最后的结论部分总结了本文的主要贡献和存在的问题，并提出了改进的方向。关键词：全差分；12 位；逐次逼近式；模数转换器；PWM 调制；CMOS ADCAbstract:We propose a fully differential 12-bit successive approximation type analog-to-digital converter (ADC) using successive approximation conversion and pulse width modulation (PWM) techniques to achieve high-precision analog-to-digital conversion at low power and low cost.The paper is divided into five parts: introduction, basic knowledge, design principles, implementation steps, and conclusions. The introduction introduces the background, significance, and application prospects of CMOS ADC. The basic knowledge section first introduces the types and principles of ADC, and then introduces the basic principles of successive approximation ADC. The design principles section elaborates the basic ideas and implementation methods of the design scheme in detail, including the sampling circuit, comparator, guidance logic, DAC circuit, and PWM modulation. The implementation steps section describes the specific implementation steps and result analysis. The conclusion summarizes the main contributions and problems of this paper, and proposes improvements.精品文档---下载后可任意编辑Keywords: fully differential; 12-bit; successive approximation; analog-to-digital converter; PWM modulation; CMOS ADC.
