The main connection circuits of the radiation-hardened differential difference amplifier based on the bipolar and field effect technological process

The architecture and circuitry of the differential difference amplifier (DDA) with higher radiation hardness (the total dose of radiation is up to 1 millirad, the neutron flux is up to 10¹³ n/cm²) are reviewed. The fundamental equations are obtained which simplify the parameter determination of the analog and digital interfaces on its basis. The characteristics of the main connection circuits of DDA are examined taking into consideration the effect of the loop gain, transadmittance of the input stages and feedback resistors. It is shown that one circuit of DDA renders possible to provide rather wide set of the identical characteristics without feedback resistors at the inverting and noninverting connections.