Cryogenic amplifier with low input-referred voltage noise calibrated by shot noise measurement<xref rid="cpb_27_6_060702_fn1" ref-type="fn">*</xref><fn id="cpb_27_6_060702_fn1"> <label>*</label> <p>Project supported by the National Natural Science Foundation of China (Grant No. 11474008), the National Key Research and Development Program of China (Grant No. 2016YFA0300904), and the National Basic Research Program of China (Grant No. 2011CBA00106).</p> </fn>

Cryogenic amplifier with low input-referred voltage noise calibrated by shot noise measurement* *

Project supported by the National Natural Science Foundation of China (Grant No. 11474008), the National Key Research and Development Program of China (Grant No. 2016YFA0300904), and the National Basic Research Program of China (Grant No. 2011CBA00106).

Yang Wuhao^†, Wei Jian

(color online) Typical DC characteristics of the cryogenic part of the amplifier at (a) room temperature and (b) liquid helium temperature. (a) V _g varies from −0.40 V (top) to −0.75 V (bottom) in 0.01-V steps. (b) V _g varies from −0.25 V (top) to −0.49 V (bottom) in 0.01-V steps.