摘要
在传感器输出信号变化范围较大的情况下,为提高分辨率,多使用具有不同增益的挡位变换方法。进而可使用2个可编程运放(PGA)芯片MCP6S28和MCP6S21级联成一个档位更多的可编程放大器,并在此基础上进行自动换档。
The changeable gains are often required for a DC amplifier to increase the resolution in the case of large signal range of the sensor. The automatic shift is realized on the PGA consisted of MCP6S28 and MCP6S21. The input and output of the cascaded PGA are sampled and the shift is controlled by a single-chip microprocessor.
出处
《自动化技术与应用》
2008年第3期119-120,15,共3页
Techniques of Automation and Applications
基金
黑龙江教育厅科技项目(编号:11511282)
