DDS control and magneto-impedance sensor signal lock-in amplifier data reading program.

The researches of the giant magnetoimpedance effect has led to the creation of magnetic field sensors with a sensitivity of millioersteds. On the basis of multilayered ferromagnetic films developed at the UrFU a prototype of weak magnetic fields detector is created. The detector is assembled according to the lock-in amplifier circuit operating at a frequency of 10.7 MHz under the control of the program described in this paper. The program provides DDS control, ADC data reading, mathematical processing of data streams, displaying graphs in real time. [ABSTRACT FROM AUTHOR]