摘要
介绍了一种便携式能谱仪高性能USB接口模数转换器的设计方案。该谱仪的模数转换器采用带采样保持器的14位高速ADC芯片和带USB接口的16位单片机,简化了电路,提高了性能;利用并道技术和软件滑尺均道技术,减少了模数转换微分非线性,具有体积小、精度高、速度快、非线性小等优点,较好地满足了便携式能谱仪的需要。
The design of a high performance analog-digital converter with USB interface for portable energy spectrometer is introduced. By taking fast 14-bit ADC with track/hold circuit and 16-bit microcontroller with USB interface, the circuit of the spectrometer analog-digital converter is simplified, and the performance is improved. Meanwhile, the DNL of the analog-digital converter is reduced by use of the technology of channel-combination and software sliding scale. Having the advantages of small size, high resolution, fast conversion and small non-linearity et al. , the spectrometer analog-digital converter can meet the requirement of portable energy spectrometer better.
出处
《核电子学与探测技术》
CAS
CSCD
北大核心
2007年第1期11-13,40,共4页
Nuclear Electronics & Detection Technology
基金
广东省自然科学基金(04011642)
关键词
便携式能谱仪
模数转换器
USB接口
单片机
portable energy spectrometer
analog-digital converter
USB interface
microeontroller
