Function generator circuit composed of the AD7520

Published:2011/8/28 22:40:00 Author:TaoXi | Keyword: Function generator | From:SeekIC

The function generator circuit which is composed of the AD7520 is as shown in the figure. The function generator basic circuit which is as shown in figure 6-37(a) is composed of the integrator A1 and the comparator A2. In the moment of T1, if the output of A2 reaches the negative saturation voltage-Uss, the output of A1 will be U. When 1+U2=0, the output of A2 will reverse, the -Uss will change into the +Ucc, the output of A1 will decrease to U. When 1+U2=0, it will reverse again. The circuit will produce the oscillation, the time constant is decided by the T=R1C1. So we can control the frequency oscillation by changing the value of R1.



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