共查询到20条相似文献,搜索用时 765 毫秒
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本文提出了一种模拟无源梯形LC电路(跳耦电路)的高阶OTA-C滤波器。该滤波器具有低的灵敏度和高的截止频率,且与MOS工艺兼容,便于单片集成,调整方便。文中给出了实验结果,证明此滤波器的可行性。 相似文献
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跨阻滤波器是将输入的电流信号转换成电压信号的同时完成信号滤波的一种新型滤波器。本文研究了高通跨阻滤波器的设计。根据传递函数中Q值的大小,分别给出了实现低Q值、中Q值和高Q值的跨阻高通滤波器电路、符号传递函数以及各种参数的符号表达式。高阶滤波器可以通过级联电压模式的滤波器二阶节电路得到。文中给出了设计实例。仿真结果验证了文中所提出的设计方法的正确性。 相似文献
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提出了一种基于运算跨导放大器和第二代电流传输器结合的电流模式多功能滤波器方法。该方法是将高阶通用电流模式滤波器的传递函数分解为n个无损积分器级联的形式,适当选定输入电流信号可同时实现低通、高通、带通、带阻等滤波功能,而电路内部结构及器件数目无需改变。与同类电路相比,其设计简便、结构简单、无源元件全部接地,且易于集成。同时文中还给出了滤波器的设计实例,Pspice仿真结果与理论分析相吻合,也验证了该方法的可行性。该滤波器可用于通信、电子测量与仪器仪表的信号处理中。 相似文献
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王春华 《固体电子学研究与进展》1999,19(3):298-304
提出了一个基于单OTA的电压模式滤波器模型电路,该模型电路仅由一个OTA 及三个RC元件构成。由该电路可产生出一阶低通、一阶高通及二阶低通、二阶带通滤波器。各滤波器具有很低的灵敏度。与诸文献[1~5]的OTA滤波器相比,结构简单且三个RC元件中有两个接地,仅一个浮端,便于集成。文中还分析了各滤波器的截止频率和通频带,给出了电路的实验结果。 相似文献
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Saiteja Damera Aydın İlker Karşılayan Jose Silva-Martinez 《Analog Integrated Circuits and Signal Processing》2016,86(2):267-274
In this paper, a new design technique for designing higher order minimally invasive lowpass filters is proposed. The proposed fully differential filter has been simulated in TSMC 130 nm technology for third and fourth orders. When compared with the conventional filter implementations such as a Tow-Thomas architecture, the proposed third order solution achieves a total in-band input-referred integrated noise of \(44.09\,\upmu V\) compared to \(78.83\,\upmu V\), achieved by a Tow-Thomas implementation. The proposed solution offers higher tolerance to blockers along with lesser number of active devices required. Though, the total capacitance used is increased from 23.82 pF to 89.82 pF, from third order Tow-Thomas filter to its minimally invasive filter counterpart, the power consumption reduces by \(77\,\%\) from third order Tow-Thomas to the third order minimally invasive filter. 相似文献
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设计了一款应用于多模多频无线接收机中的新型有源电阻电容信道选择滤波器,截止频率可在0.3~10MHz之间切换,满足UHF RFID、TD-SCDMA、WLAN a/b/g等不同标准的要求。运算放大器设计采用无电容前馈补偿技术,增益带宽积提升至4.8GHz。滤波器采用5阶Leapfrog滤波器级联2阶Tow-Thomas滤波器结构,使截止频率不易受器件变化的影响,同时兼顾稳定性和可调性。电路采用IBM 0.13μm CMOS工艺流片。测试结果表明,在2.5V电源电压下选择10MHz带宽时,滤波器消耗13.56mA电流,在两倍截止频率处实现64dB的衰减,带内噪声系数为28dB,带内纹波小于0.2dB,带内输入3阶交调为11.5dBm。 相似文献
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Active compensation of the Tow-Thomas bandpass circuit improves performance only at small signal levels. With larger signals, nonlinear oscillations can occur and it is necessary to equalise input signals. 相似文献
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The nodal voltage simulation technique described for generating new active RC filters has been shown to be applicable to the derivation of MOSFET-C filters from active RC filters. The application of the method to Tarmy-Ghausi active RC filter is considered. Further, two MOSFET-C biquads based on the Tow-Thomas active RC biquad are proposed. 相似文献
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High-linearity self-tuning continuous-time filters, fabricated in a standard 1.6-μm 5-V CMOS process, are presented. Frequency control is achieved using switchable arrays of highly linear double-polysilicon capacitors in an active RC filter structure, resulting in tunable filters with very low signal distortion. One filter, a Tow-Thomas biquad, exhibits dynamic range and signal linearity of typically 91 dB. Another smaller implementation, a Sallen and Key filter, attains ⩾76 dB. Cutoff frequency response is maintained to an accuracy of around ±5% 相似文献
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《Electronics letters》1996,32(8):722-723
A fully integrated Tow-Thomas (TT) biquad is generated using CFA based integrators developed by the authors. The proposed circuit has the following features: use of only grounded capacitors, orthogonal voltage control of ω0, and Q, and cascadability. Simulation results which agree well with the theoretical analysis are obtained 相似文献
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