Parametric Optimization Subsystem in LTspice Environment of Analog Microcircuits for Operation at Low Temperatures

A parametric optimization subsystem (PPS) has been developed that focuses on the use of the LTspice environment for designing low-temperature and radiation-hardened analog microcircuits in space instrumentation tasks. However., local optimization (NM, MAGPM), global optimization (DE, jDE, PSO, SA, ABC), multi-criteria optimization (NSGA-II, SPEA2, MO-CMA-ES), parallel optimization on a multi-core processor, distributed optimization on the cluster of personal computers, plotting the fitness functions and Pareto efficiency, operation with the latest version of LTspice are provided. An example of parameter optimization of the elements of a low-temperature output stage (BA) of an operational amplifier, realized on complementary junction field-effect transistors, is given. A comparison of the characteristics of optimal and non-optimal BA is presented.