Sun Dec 26 02:36:01 EST 2010
State variable filter
I have one breadboarded, but intuition is missing.
- What is the influence of the 2 integrator feedback coefficient?
- How to prevent small resistors = large opamp loads? See TAOE p
279 which advises to keep resistors above 5k.
- What about the open loop gain at a particular frequency? The time
constant is set by the RC product, but the gain at a particular
frequency is not.
- Why does the SVF oscillate? An ideal one is not supposed to. Is
this due to noise or nonlinearities?