Optimizing the Stage Resolution of a 10-Bit, 50 Ms/Sec Pipelined A/D Converter &Its Impact on Speed, Power, Area, and Linearity

• 作者: Kondepudi Lal Kishore Perala Prasad Rao
• 来源期刊: 电路与系统(英文)
• 学科: 工学
• 关键词: Switched Capacitor Sample and Hold Circuit 1.5 Bits/Stage LINEARITY POWER REDUNDANCY Folded CASCODE Op-Amp
• 年，卷（期）: 2012,（2）
• 页码范围: 166-175
• 页数: 10页
• 分类号: TN7

摘要

At high speeds and high resolution, the Pipeline ADCs are becoming popular. The options of different stage resolutions in Pipelined ADCs and their effect on speed, power dissipation, linearity and area are discussed in this paper. The basic building blocks viz. Op-Amp Sample and Hold circuit, sub converter, D/A Converter and residue amplifier used in every stage is assumed to be identical. The sub converters are implemented using flash architectures. The paper implements a 10-bit 50 Mega Samples/Sec Pipelined A/D Converter using 1, 1.5, 2, 3, 4 and 5 bits/stage conversion techniques and discusses about its impact on speed, power, area, and linearity. The design implementation uses 0.18 μm CMOS technology and a 3.3 V power supply. The paper concludes stating that a resolution of 2 bits/stage is optimum for a Pipelined ADC and to reduce the design complexity, we may go up to 3 bits/stage.