Xin WANG (王鑫), Chang-zhi Lü（吕常智）, De-yong WANG（王德勇）
College of Information and Electrical Engineering, Shandong Unive rsity of Science and Technology, Qingdao 266510, China
Abstract-Distortion is a technical indicator in the field of common voice signal processing. The design is a portable distortion degree teste r, based on Field-Programmable Gate Array (FPGA, EP2C20) as the core, using harmonic analysis method which better solve the distortion problem of accuracy. It can achieve the signal transformation from the time-domain to the frequency -domain, and is widely used for signal spectrum analysis. All the components us ed in the design are low power, high performance, low drift and industrial grade co mponents. The reference voltage sources of ADC and DAC have identical performanc e of high stability, high precision. The clock is the precise stable clock with FPGA temperature compensation. This project can get the cost-effective, high-p recision, low power and portable design goals.
Key words-distortion degree; FPGA; measuring apparatus
Manuscript Number: 1674-8042(2011)01-0078-03
dio: 10.3969/j.issn.1674-8042.2011.01.20
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