| 资料名称: |
可调频率跨导电容Chebyshev滤波器的设计及仿真 (带源级反馈有源电阻的全差分跨导运放的设计及仿真,频率调节电路,跨导电容四阶滤波器设计,有源 Chebyshev 低通滤波器设计及仿真) Design and simulation of a tunable frequency OTA-C Chebyshev filter |
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| 上传日期: |
2007-08-16 |
| 资料等级: |
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2 |
| 资料简介: |
Abstract: A new transconductor operational amplifier(OTA) using active resistor of source degeneration was presented. The method was developed through acting differential pair degenerated by two MOSFET operating in the triode region as active resistor in its input stage, the circuit was designed in working in stable quiescent operating point with folded cascade output stage using voltage common-mode feedback(CMFB) circuit. As an tunable cutoff frequency fourth order Chebyshev lowpass filter, an accurately tunable Gm of OTA was used, which employed switching capacitor technique to tune Gm value. Simulated results show that the practical frequency response of the filter is very near to that of idealized prototype by applying 2-poly 4-metal 3.3V power supply 0.35μm CMOS technology spice model.
摘 要:首先提出了一种新的跨导运放,其输入级采用了工作在线性区的 MOS 管作源极负反馈有源电阻实现其良好的线性度,输出级采用折叠式结构,并在电路中引入电压共模负反馈(CMFB)稳定其静态工作点。接着提
出了一种新的利用开关电容技术调节跨导运放偏置电流值大小的电路,应用该电路可以精确调节跨导运放 Gm 值的大小,应用这些电路设计得到了四阶 Chebyshev 低通滤波器,并实现其频率的精确可调,0.35μm 2 层多晶硅,4 层金属 CMOS 工艺 Spice model 仿真结果表明设计正确、有效。 |
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变压器次级有源箝位正激变换器的研究 (变压器次级有源箝位电路工作原理,箝位电容设计) Research on a Forward Converter by using Secondary Active Clamp |
| 下一篇: |
同步整流反激变换器的损耗模型分析 (功率MOSFETM,反激变压器,滤波电容有关的损耗模型分析...) Analysis of Power Dissipation Model on Flyback Converter with Synchronous Rectification |
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