基于CMOS的电子传感接收电路的设计与实现
2017-09-25邱小群张钢
邱小群++张钢



摘 要: 当前电子传感接收电路具有能耗高、性能参数不符合要求的弊端。为此,设计一种新的基于CMOS的电子传感接收电路,并介绍了电子传感接收电路设计方案。依据设计方案,选用源级负反馈电感匹配结构对低噪声放大器的基本电路结构进行设计;为达到性能指标和降低功耗,混频器電路结构选用无源双平衡混频器结构;为了降低整个电子传感接收电路的能耗,令无源双平衡混频器的开关MOS管在无电流偏置的情况下运行。给出了复数滤波器设计的基本思想,通过反馈系统对编程增益放大器的增益进行管理,实现可编程放大器的设计。实验结果表明,所设计电路性能符合设计要求。
关键词: CMOS; 电子传感接收电路; 复数滤波器; 无源双平衡混频器; 编程增益放大器
中图分类号: TN99?34; TP393 文献标识码: A 文章编号: 1004?373X(2017)18?0124?03
Design and implementation electronic sensing receiving circuit based on CMOS
QIU Xiaoqun1, ZHANG Gang2
(1. School of Electronic and Information Engineering, Zhuhai City Polytechnic, Zhuhai 519090, China;
2. School of Automation, Guangdong University of Technology, Guangzhou 510006, China)
Abstract: The current electronic sensing receiving circuit has high energy consumption, and its performance parameters can′t meet the design requirements. Therefore, a new electronic sensing receiving circuit based on CMOS was designed. Its design scheme is introduced in this paper. According to this design scheme, the source?level negative feedback inductance matching structure is selected to design the basic circuit structure of the low?noise amplifier. In order to reach the performance index and reduce the power consumption, the structure of passive double balanced mixer is chosen for the circuit structure of mixer. For reducing the energy consumption of the whole electronic sensing receiving circuit, the switch MOS tube of passive double balanced mixer operates without current bias. The basic design thought of complex filter is given. The gain of the programmable gain amplifier is controlled by feedback system to realize the design of programmable amplifier. The experimental results show that the circuit performance meets the design requirements.
Keywords: CMOS; electronic sensing receiving circuit; complex filter; passive double balanced mixer; programmable gain amplifier
随着科技的逐渐发展,无线传感网络技术被广泛应用于军事、医疗和工业等领域。而电子传感接收电路是整个无线传感网络中的重要模块,对整个系统的性能指标产生直接影响[1]。因此,设计一种有效的电子传感接收电路具有重要意义。
1 基于CMOS的电子传感接收电路的设计与实现
1.1 电子传感接收电路设计方案
电子传感接收电路的基本思想如下:低频信号经天线和滤波处理后,通过低噪声放大器完成对其的放大处理,利用Mixer混频和下变频对中频信号进行采集 [2]。与一般的接收电路相比,电子传感接收电路结构需对对应镜象频率干扰进行滤除,通常情况下,低中频信号经下变频后被引入复数滤波器,其不仅可实现镜象干扰的滤除,还可准确判断有用信道。……
