In this paper, a comparator and an operational amplifier considered as essential components, constituting a 10-bit 50-MHz pipeline Analog-to-Digital Converter for Wireless Local Area Network (WLAN) applications, are described and designed. All post-layout and Monte-Carlo simulations, using a 0.35μm CMOS AMS process technology with 3.3V supply voltage and an input common-mode range of 1.15–2.15V, are achieved. An improved clocked comparator with a dynamic latch, based on a switched capacitor network, using the current reuse technique for slew rate enhancement and positive feedback for offset voltage compensation, is presented. The operational amplifier, consisting of a fully differential folded cascode operational transconductance amplifier, providing high-gain and good stability, is exhibited. A new frequency compensation technique, based on active resistors, is used to improve amplifier phase-margin. The Monte-Carlo performance results of the designed clocked comparator provide an offset voltage of 32.32mV with 2.49mV 3σ deviation, a slew rate of 8.29V/ns with 0.45V/ns 3σ deviation, and a propagation delay of 4.16ns with 0.15ns 3σ deviation. Monte-Carlo performance results of the designed operational amplifier provide a phase-margin of 63.01∘, and a high-gain of 79.22dB with 1.92∘ and 4.86dB 3σ, respectively, by using 1pF load capacitance.

中文翻译：

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基于电流重用的改进比较器和用于流水线 ADC 的 OTA 中的新频率补偿技术

在本文中，描述和设计了一个比较器和一个运算放大器，它们被视为必不可少的组件，构成了一个用于无线局域网 (WLAN) 应用的 10 位 50-MHz 流水线模数转换器。所有布局后和蒙特卡罗模拟，使用 0.35μm CMOS AMS 工艺技术与3.3V 电源电压和输入共模范围1.15–2.15五、实现。提出了一种基于开关电容网络的具有动态锁存器的改进型时钟比较器，该比较器使用电流重用技术来提高压摆率，并使用正反馈来补偿失调电压。展示了由全差分折叠级联运算跨导放大器组成的运算放大器，具有高增益和良好的稳定性。一种基于有源电阻器的新频率补偿技术用于改善放大器相位裕度。设计的时钟比较器的蒙特卡罗性能结果提供了一个偏移电压32.32毫伏与2.49毫伏 3σ偏差，压摆率8.29V/ns 与0.45V/ns 3σ偏差，以及传播延迟4.16与0.15ns 3σ偏差。所设计运算放大器的蒙特卡罗性能结果提供了一个相位裕度63.01∘，以及高增益79.22分贝与1.92∘和4.86分贝 3σ，分别通过使用1pF负载电容。