Ah, yes. I have that book and see that circuit. You must be referring to the circuit described starting on page 236 entitled "Multiple Feedback Bandpass Filter". Excellent. Thank you very much.
Thank you.
I would d "have, but I downloaded the article
that triggered my interest it from Electronics Design News some
months ago, and I can't now find it in the EDN articles. In the
article is a reference to page 236 of 'Analog Circuits - World
Class Designs', edited by BP, but this doesn't address varying
R2 over a wide range of tuning. However, it does say that
varying R2 doesn't change the peak frequency gain, and that gain
is R3/2R1.
On 2025-05-11 15:27, Dave Daniel via
wrote:
Would you please supply the original article,
chapter or whatever in which Bob Pease wrote his result? Thank
you.
I have uploaded the above as a .ZIP.
According to Bob Pease, the gain at the peak should be
close to 34 dB, independent of the tuned frequency. I
don't get either of those results using version
24.1.8. However, the bandwidth is fairly constant with
frequency, as predicted. I can't believe Bob Pease
reported the performance in error.
--
Best wishes John Woodgate RAYLEIGH Essex OOO-Own
Opinions Only
If something is true: * as far as we know - it's science
*for certain - it's mathematics *unquestionably - it's
religion
--
Best wishes John Woodgate RAYLEIGH Essex OOO-Own Opinions Only
If something is true: * as far as we know - it's science *for
certain - it's mathematics *unquestionably - it's religion
