低延迟低电压电流比较器
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摘要
设计了一种基于改进共源共栅电流镜的CMOS电流比较器,该比较器在1 V电压且电压误差±10%的状态下都正常工作,同时改进后的结构能够在低电压下取得较低的比较延迟。电路的输入级将输入的电流信号转化为电压信号,电平移位级的引入使该结构能够正常工作在不同的工艺角和温度下,然后通过放大器和反相器得到轨对轨输出电压。基于SMIC 0.18μm CMOS工艺进行了版图设计,并使用SPECTRE软件在不同工艺角、温度和电源电压下对电路进行了仿真。结果表明,该电路在TT工艺角下的比较精度为100 nA,平均功耗为85.53μW,延迟为2.55 ns,适合应用于高精度、低功耗电流型集成电路中。
A CMOS current comparator based on an improved cascode current mirror was designed. The comparator works normally at 1 V voltage with a voltage error of ±10%, and the improved structure can achieve lower comparative delay at low voltage. The input stage of the circuit converts the input current signal into the voltage signal. The introduction of the level shift stage enables the circuit to work normally at different process corners and temperatures. Then, the rail-to-rail output voltage was obtained through amplifiers and inverters. Finally, the layout was designed based on SMIC 0.18 μm CMOS process and the circuit was simulated by SPECTRE software at different process corners, temperatures and power supply voltages. The results show that the circuit achieves a comparative accuracy of 100 nA at TT process corner with an average power consumption of 85.53 μW and a delay of 2.55 ns. So, it is suitable for the high accuracy low power consumption current-mode integrated circuit.
A CMOS current comparator based on an improved cascode current mirror was designed. The comparator works normally at 1 V voltage with a voltage error of ±10%, and the improved structure can achieve lower comparative delay at low voltage. The input stage of the circuit converts the input current signal into the voltage signal. The introduction of the level shift stage enables the circuit to work normally at different process corners and temperatures. Then, the rail-to-rail output voltage was obtained through amplifiers and inverters. Finally, the layout was designed based on SMIC 0.18 μm CMOS process and the circuit was simulated by SPECTRE software at different process corners, temperatures and power supply voltages. The results show that the circuit achieves a comparative accuracy of 100 nA at TT process corner with an average power consumption of 85.53 μW and a delay of 2.55 ns. So, it is suitable for the high accuracy low power consumption current-mode integrated circuit.
引文
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[2] 欧阳托日,黄鲁.一种减小纹波电压的新型电荷泵调节电路 [J].信息技术与网络安全,2018,37(4):116-119.OUYANG T R,HUANG L.A new charge pump regulator with small ripple voltage [J].Information Technology and Network Security,2018,37(4):116-119 (in Chinese).
[3] PALMISANO G,PALUMBO G.High performance CMOS current comparator design [J].IEEE Transactions on Circuits and Systems:II,1996,43(12):785-790.
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[6] SRIDHAR R,PANDEY N,BHATTACHARYYA A,et al.High speed high resolution current comparator and its application to analog to digital converter [J].Journal of the Institution of Engineers,2016,97(2):147-154.
[7] 陈卢,石秉学,卢纯.一种新型的高性能CMOS电流比较器电路 [J].半导体学报,2001,22(3):362-365.CHEN L,SHI B X,LU C.Novel high-performance CMOS current comparator circuit [J].Chinese Journal of Semiconductors,2001,22 (3):362-365 (in Chinese).
[8] CHAVOSHISANI R,HASHEMIPOUR O.A high-speed current conveyor based current comparator [J].Micro-electronics Journal,2011,42(1):28-32.
[9] MOLINAR-SOLIS J E,NAVARRO M G,MEJIA I,et al.Low input resistance CMOS current comparator based on the FVF for low-power applications [J].Canadian Journal of Electrical and Computer Engineering,2016,39(2):127-131.
[10] SAXENA S,AKASHE S.High performance CMOS current comparator using MTCMOS technique design [C]// Proceedings of the Innovative Applications of Computational Intelligence on Power,Energy and Controls with Their Impact on Humanity.Ghaziabad,India,2014:345-349.
[11] TRAFF H.Novel approach to high speed CMOS current comparators [J].Electronics Letters,1992,28(3):310-312.
[12] BADAL M T I,MASHURI M B,REAZ M B I,et al.Low power high-speed current comparator using 130 nm CMOS technology [C] // Proceedings of the International Confe-rence on Advances in Electrical,Electronic and Systems Engineering.Putrajaya,Malaysia,2017:72-76.
[2] 欧阳托日,黄鲁.一种减小纹波电压的新型电荷泵调节电路 [J].信息技术与网络安全,2018,37(4):116-119.OUYANG T R,HUANG L.A new charge pump regulator with small ripple voltage [J].Information Technology and Network Security,2018,37(4):116-119 (in Chinese).
[3] PALMISANO G,PALUMBO G.High performance CMOS current comparator design [J].IEEE Transactions on Circuits and Systems:II,1996,43(12):785-790.
[4] GIANNINI V,CRANINCKX J,COME B,et al.1.5 GHz fully differential latched current comparator with 20 nA of sensitivity [C] // Proceedings of the Ph.D.Research in Microelectronics and Electronics.Otranto,Italy,2006:181-184.
[5] BHATIA V,MADAN M,KAUR B,et al.A novel CC-II based current comparator and its application as current mode flash ADC [C] // Proceedings of the International Conference on Multimedia,Signal Processing and Communication Technologies.Aligarh,India,2014:217-222.
[6] SRIDHAR R,PANDEY N,BHATTACHARYYA A,et al.High speed high resolution current comparator and its application to analog to digital converter [J].Journal of the Institution of Engineers,2016,97(2):147-154.
[7] 陈卢,石秉学,卢纯.一种新型的高性能CMOS电流比较器电路 [J].半导体学报,2001,22(3):362-365.CHEN L,SHI B X,LU C.Novel high-performance CMOS current comparator circuit [J].Chinese Journal of Semiconductors,2001,22 (3):362-365 (in Chinese).
[8] CHAVOSHISANI R,HASHEMIPOUR O.A high-speed current conveyor based current comparator [J].Micro-electronics Journal,2011,42(1):28-32.
[9] MOLINAR-SOLIS J E,NAVARRO M G,MEJIA I,et al.Low input resistance CMOS current comparator based on the FVF for low-power applications [J].Canadian Journal of Electrical and Computer Engineering,2016,39(2):127-131.
[10] SAXENA S,AKASHE S.High performance CMOS current comparator using MTCMOS technique design [C]// Proceedings of the Innovative Applications of Computational Intelligence on Power,Energy and Controls with Their Impact on Humanity.Ghaziabad,India,2014:345-349.
[11] TRAFF H.Novel approach to high speed CMOS current comparators [J].Electronics Letters,1992,28(3):310-312.
[12] BADAL M T I,MASHURI M B,REAZ M B I,et al.Low power high-speed current comparator using 130 nm CMOS technology [C] // Proceedings of the International Confe-rence on Advances in Electrical,Electronic and Systems Engineering.Putrajaya,Malaysia,2017:72-76.