Relationship between the operational amplifier gain and bandwidth and bandpass filter response

Active filters that use operational amplifiers depend on the performance of the amplifier for their performance as well. Recently  a brief study was made at Signal Processing Group Inc. using circuit simulations to identify and quantify these effects. A test bandpass filter was set up that used a MLF ( multi-loop feedbck) RC/ operational amplifier based second order bandpass filter centered at 1 Mhz. Simulations were done to assess the effects of varying gain and operational amplifier bandwidth. Results are available for interested parties on the SPG website located at The link can be found under the free articles page of the website.

We design and deliver analog and RF/wireless ASICs and modules using state of the art semiconductor, PCB and assembly technologies. Please contact us at for a quote and a proposal.



Leave a Reply