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Multisim simulation error in High-pass Filter Circuit Design

E

Eva713

Member
Hi,
I have problem about high pass filter circuit design. Carry out NI Multisim according to the infinite gain multi-feedback high-pass filter circuit provided by the related analog book. The cut-off frequency is 10MHz, and the component parameters are determined according to the caculating formulas from High Pass Filter Electronic Note, but in the simulation, the -3dB point in the Bode plot amplitude-frequency curve is around 8.5MHz instead of 10MHz.

Bode Plots.jpg

Bode Plotter-XBP1.jpg

Is there anyone can give me some ideas to figure it out? Many thanks.
Eva
 
Seems like you are using a +/-5V opamp with +/-15V supplies (assuming non-behavioral model for the opamp). Check if this is causing the opamp to be way out of spec before investigating further. Trust you have calculated the component values correctly as well.
 
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