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A 2.4GHz CMOS Low Power Zero-IF Receiver for Wireless Sensor Network

Author: ZiXi
Tutor: ZhouJinFangï¼›ChenKangSheng
School: Zhejiang University
Course: Electronics and Communication Engineering
Keywords: Wireless sensor networks CMOS Zero-IF receiver DC offset Flicker noise
CLC: TN858
Type: Master's thesis
Year: 2012
Downloads: 67
Quote: 0
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Abstract


This article looks at the current domestic and international wireless sensor networks widely used , market prospects and boom , using TSMC 0.18um CMOS RF / Mixed Signal technology , the design of a proprietary 2.4GHz fully integrated low-power zero-IF receiver front-end circuit chip . In this paper, the top-down method of chip design . The first step for the wireless sensor network node low-power, low-cost design requirements , select zero IF architecture as 2.4GHz RF receiver structure programs and propose a way to solve the DC offset and flicker noise ; second step, parameters based on the indicators specified in the physical layer protocol standard IEEE802.15.4 wireless sensor networks 2.4GHz , 2.4GHz zero-IF receiver front-end system performance through system-level calculation and analysis , including : the noise figure of the system , the system linearity, sensitivity , spurious-free dynamic range of the system gain , channel selection performance , and system power consumption ; third step , depending on the nature of the cascade network , calculated circuit performance requirements of each module , and based on these indicators , reasonable circuit structure and optimized parameters , design the circuit schematic and layout , and good simulation results ; Finally , 2.4GHz zero-IF receiver front-end system overall circuit schematics and overall layout and the system-level simulation , compared with the same type of design results . In this paper, the design of 2.4GHz zero-IF receiver front-end chip gain variation range of 19.4dB-75.3dB, and the noise figure of the system to 20.1dB 24.4dB offset from the carrier 5MHz at the adjacent channel rejection ratio of 33dB , deviate from the carrier 10MHz at to neighboring adjacent channel suppression ratio of 53dB , 1dB gain compression point of - 19.7dBm input third order intercept point of -10dBm , the overall power consumption as low as 1.8Vx8.2mA overall layout area to 1.6mmx1.0mm the indicators meet the application requirements of 2.4GHz wireless sensor networks . AC-coupled technology to completely eliminate the DC offset of the zero-IF receiver , and the flicker noise corner as low as 57KHz successfully resolved the problem of flicker noise at the same time eliminate the DC offset .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Radio equipment,telecommunications equipment > Receiver equipment, radio Radio > Various frequency radio
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