Design and Implementation of AGC in Gas Ultrasonic Flowmeter

摘要：

The paper proposes a new circuit of all-digital automatic gain control (AGC) in the gas ultrasonic flowmeter at first. The design is implemented on the EP1S40F1020 FPGA chip. A scheme, design of main function modules and test are given in the paper. This design can achieve 40dB dynamic range control, with advantages of high precision, high rangeability, little environment influence, good stability and excellent reliability. In order to achieve a larger dynamic range control, the circuits which are composed of all-digital AGC and analog AGC using AD8367 are proposed and tested. The result is when the input signal dynamic range is from -60dBm to 0dBm, the output fluctuation is under 3dB and the designed AGC system is more suitable for the demand of the gas ultrasonic flowmeters real-time and high precision.

关键词： Gas ultrasonic flowmeter digital-AGC analog-AGC FPGA EPIS40F1020I6

作者: Liu Yanping Liu Xin Nan Jing Yang Jia

作者单位: Hebei University of Technology,Tianjin 300130 China China Electronics Technology Group Corporation NO.54 th Research Institute,Shijiazhuang 050081 China

会议类型: 国际会议

会议名称: 第八届国际电子测量与仪器学术会议(Proceedings of 2007 8th International Conference on Electronic Measurement & Instruments)

会议地点: 西安

会议语种:英文

在线出版日期: 2007-08-16（万方平台首次上网日期，不代表论文的发表时间）