| 一种可编程高线性CMOSOTA的设计 |
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| 引用本文： | 魏镜,王卫东.一种可编程高线性CMOSOTA的设计[J].电子器件,2011,34(4):415-418. |
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| 作者姓名： | 魏镜 王卫东 |
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| 作者单位： | 桂林电子科技大学信息与通信学院; |
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| 基金项目： | 广西科学研究与技术开发计划项目(0731021) |
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| 摘 要： | 采用SMIC 0.18 μm工艺,±0.9 V电源电压,提出了一种可编程高线性全对称伪差分 CMOS OTA 电路.提出的伪差 分输入级电路基于基本伪差分(PD)结构并采用 HD3 前馈技术消除三阶谐波失真,输出级采用可编程电流放大器实现.使用 Cadence 软件的 Spectre 仿真器进行电路仿真可得,Gm值三个...
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| 关 键 词： | 可编程运算跨导放大器 共模前馈 HD3前馈 电流放大器 |
Design of a Programmable Linearized CMOS OTA |
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| WEI Jing,WANG Weidong.Design of a Programmable Linearized CMOS OTA[J].Journal of Electron Devices,2011,34(4):415-418. |
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| Authors: | WEI Jing WANG Weidong |
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| Affiliation: | WEI Jing,WANG Weidong~* (College of Information and Communication School,Guilin University of Electronic Technology,Guilin Guangxi 541004,China) |
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| Abstract: | Based on SMIC 0.18μm CMOS process for a power supply of±0.9 V,a fully balanced structure of a programmable operational transconductance amplifier with high linearity is described.The proposed circuit is based on a conventional pseudo-differential structure with a third-order harmonic distortion feedforward technique to cancel out the output 3rd harmonic component,and a programmable-gain current amplifier as output stage.The performance of the proposed circuit is confirmed through Cadence Spectre simulation results.Its transconductance gain can be linearly tuned by an external bias current for more than three decades and -3 dB bandwidth of 779 MHz.Finally, design of a biquad OTA-C filter to verify the correctness. |
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| Keywords: | POTA CMFF HD3 Feedforward current amplifier |
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