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9 years, 3 months ago.
Who can help me with this design?
Hello, I use the adder to rise signal to 2.5 V. Then I begin using op37, but the bandwidth is not enough. I replace it with opa847. The datasheet is http://www.kynix.com/Detail/1204485/OPA847ID.html. After that the input signal has problems. The waveform is shown in figure. The input waveform of op37 observed is shown in another figure. My questions is what is the value of resistance in the adder besides the R1 = R2, Rf = 2 rg?
Regards. 
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