The main results of the development of a precision low-current meter based on a nonlinear ADC are presented. It is shown that the application of the method of nonlinear analog-to-digital conversion and a controlled voltage level at the non-inverting input of an integrating operational amplifier allows both high sensitivity and a wide dynamic range with a small spread of output codes. The use of the laboratory sample of the meter for cyclic tensile testing of steel specimens is described.
Programmable nonlinear ADC: an illustrative example Programmable nonlinear analog-to-digital conversion is a new topic in EE curricula. With a view to introducing the EE student to the concept of transfer characteristic programmability of an analog-to-digital converter (ADC), a memory-prefetch programmable nonlinear ADC is presented. The design, analytical evaluation, and experimental implementation for the ADC are described.
A precision low-frequency Analog-to-Digital converter for advanced systems of technical diagnostics and nondestructive testing
