根据论文，运用tsmc18rf实现0.3V 轨对轨 低功耗OTA

CDzhang

值得提出的是文章使用衬底驱动，觉得挺有意思。
文章摘要：A new solution for an ultra-low-voltage, ultra-low-power operational transconductanceamplifier (OTA) is presented in the paper. The design exploits a three-stage structure with a ReversedMiller Compensation Scheme, where the input stage is based on a non-tailed bulk-driven differential pair.Optimization of the structure for very low supply voltage is discussed. The resulting amplifier outperformsother ultra-low-voltage OTAs in terms of a DC voltage gain and power efficiency, expressed by standardfigures of merit. Experimental verification using a 0.18 µm CMOS technology, with supply voltage of 0.3-V,showed a dissipation power of 13 nW, a DC voltage gain of 98 dB, a gain-bandwidth product of 3.1 kHzand an average slew-rate of 9.1 V/ms at 30 pF load capacitance. The experimental results agree well withsimulations.
资料是IEEE网站中作者发布的文章和用candence实现原理图仿真。

仿真图片如下：
1.开环增益：


2.共模输入范围：


3.共模抑制比


有兴趣可以仿仿别的参数，比如转换速率，电源抑制比，环路增益（stb)

敬山一休

谢谢分享

amigo.change

hustjzr

仿真了一下，竟然只有13nW的功耗

hustjzr

这个好像是用于生物医疗前端电路的放大器吧，ECG信号频率0.1Hz-100Hz，刚好可以用