Small signals measuring system based on in-system programmability programmable analog circuits

In this paper a kind of small signals measuring system is designed. The system makes use of in-system programmability programmable analog circuits ispPAC10 to accomplish the design in the analog front end which includes multipath selection, amplification, adjusting (signal smoothing, integration and summing) and buffering circuits. The integrity small signal measurement system which is composed of IspPAC10, self-zero network, single-chip computer and ADC can control the gain and display the measurement values with LED.