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) (a) Circuit schematic diagram of our amplifier. (b) Layout of the CRYOAMP circuit board. Metal (yellow regions) is patterned by etching one-side surface copper coating FR-4 glass epoxy, whose size is 1 cm×2 cm. Four red points show the solder points on the printed-circuit board, which connect the inner pin of the connector. (c) Photograph of a CRYOAMP circuit board.