Design and Implementation of AGC in Gas Ultrasonic Flowmeter

Author

Yanping, Liu ; Xin, Liu ; Jing, Nan ; Jia, Yang

Author_Institution

Hebei Univ. of Technol., Tianjin

fYear

2007

Abstract

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 OdBm, the output fluctuation is under 3dB and the designed AGC system is more suitable for the demand of the gas ultrasonic flowmeter´s real-time and high precision.

Keywords

automatic gain control; field programmable gate arrays; flowmeters; ultrasonic devices; ultrasonic measurement; AGC; EP1S40F1020 FPGA chip; all-digital automatic gain control; dynamic range control; gas ultrasonic flowmeter; reliability; stability; Circuit testing; Clocks; Counting circuits; Dynamic range; Field programmable gate arrays; Fluctuations; IIR filters; Instruments; Paper technology; Ultrasonic variables measurement; EPIS40F102016; FPGA; Gas ultrasonic flowmeter; analog-AGC; digital-AGC;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronic Measurement and Instruments, 2007. ICEMI '07. 8th International Conference on

Conference_Location

Xi´an

Print_ISBN

978-1-4244-1136-8

Electronic_ISBN

978-1-4244-1136-8

Type

conf

DOI

10.1109/ICEMI.2007.4350505

Filename

4350505