AB Class CJFET Dual-Input Stage for Low Temperature Analog ICs

We suggest original circuit of input differential stage (DS) of AB class on a base of complementary field effect transistors with p-n-junction (CJFET). The main application of the DS is low noise analog ICs for operation in low temperatures, including cryogenic temperatures. Special circuit design of DS static mode circuit design and its parametric optimization in LTspice simulation software provide relatively high stability of static mode of input CJFET in wide temperature rage. At the same time, DSs common-mode rejection ratio (CMRR). We show a possibility to update DS circuit design on CMOS transistors.