摘要
介绍了精密放大器的现状和实现精密放大器的低噪声失调电路技术,着重讨论了自稳零和斩波稳零电路技术,定量分析了这两类电路技术对电路噪声的影响,给出了各自的仿真结果。理论分析和仿真结果均表明,该两类电路技术能很好地抑制电路的失调和噪声,实现微弱传感器信号的精确放大。最后对精密放大器的未来发展空间作了展望。
The current state of precision op-amp and the circuit techniques available to realize are introduced in this paper, emphasis are given to autozero and chopper stabilization circuit techniques, their influence on circuit noise are quantitattive ana-lyzed coupled with simulation results. It is convinced by theory analysis and simulation result that these two kinds of circuit techniques can well restrain the offset and noise and can give a precision amplification of weak sensor signal. At last, the future development space of this kind of op -amp is expected.
出处
《现代电子技术》
2008年第9期153-155,共3页
Modern Electronics Technique
关键词
精密放大器
低噪声失调电路技术
自稳零
斩波稳零
发展空间
precision op-amp
low noise and offset circuit techniques
autozero
chopper stabilization
development space
