摘要
模数转换器分辨率不高将引起量化误差过大,且影响输出信号的不平滑。目前提高分辨率的办法主要是增加转换位数,转换位数增加使得模数转换器价格昂贵。中文提出粗细量化结合方法,通过低分辨率模数转换器和数模转换器的组合来实现高分辨率的模数转换器,并通过改进,由现场可编程门阵列来实现逐次逼近型模数转换器的控制逻辑部分。既可以增加模数转换器的分辨率,同时对模数转换器的速度影响不大。达到了用低成本的器件设计超过24位的高分辨率模数转换器,具有一定的实用价值。
ADC resolution is not high will cause the large quantization error, and make the output signal is not smooth. The current approach to improving resolution is to increase the conversion digits, while the conversion digits increase makes the ADC conversion is expensive. This paper combined with the coarse-fine quantitative methods, through a combination of low-resolution ADC and DAC to achieve high-resolution ADC, and through improvements, it achieved the field programmable gate array mold successive approximation conversion part of the control logic device. The design can increase the ADC resolution, while little effect on the speed of the ADC. It achieves with low-cost device designed over 24 high-resolution ADC, has some practical value.
出处
《仪表技术与传感器》
CSCD
北大核心
2011年第10期93-95,共3页
Instrument Technique and Sensor
