MORE Active RC Filters

#222 In this video I continue looking at the topic of active RC filters by first of all analyzing the All-Pass filter and then looking at some other active circuits that can be used in the building of filter. In particular I look at the negative impedance converter and the general impedance converter. After analyzing what the circuits are supposed to do, I try out some simulations to see how it really works and what sort of circuits can be built around these. Finally I look at a particular filter design tool that give a complete overview, not just of how to chose components but also of the complete behavior including tolerances and op-amp limitations.

Filter series:

Further reading:
Op amps for everyone, Ron Mancini, 2002
The art of electronics, P. Horowitz and W. Hills, 2019

Filter Design Tool:

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[joejane]

i believe the device word type you are looking for is a gyrator
IMSAI 1781 Gyrator (part 1 of 4) youtube video title was a great over view on this item as well
thank you for covering it as well as everyone learns a different way and more knowledge is better then less

[thecheapaudioengineer]

Hmmm so a zero degree phase shift high pass filter and low pass filter is possible

[BoxingDayAC]

12:30 The gyrator forces the simulated inductor in parallel but can't two gyrators be linked at their grounds with halved values to put it in series? I haven't seen an example circuit.

[RensePosthumus]

As always very entertaing. I've learned a lot.

[_tiredofidiocy_]

Hmm, I didn’t even know that it's possible to build a low-pass filter with a constant phase using a negative impedance converter.
And even bandpass filter 10:46 with constant phase in passband!? It looks like some kind of miracles, everything looked like it was impossible in principle. I now need to doublecheck this )

[ТрансиверТСВ]

Hi. Try to develop a driver for field mosfets so that it is better than IXDN609CI. Exactly. The power supply voltage of the driver is +22...25V. The driver load (mosfet gate capacity) is up to 3nf. And most importantly - the most even meander at frequencies up to 12 MHz.

[likemarksee]

Are you self employed? Your skills could help to speed up my project….on DIN rail mounted modules to filter noise. Noise comes from the mains supply (pump inverters) as well as switching power supplies. I have a rough design/plan, (proven), but I’m short on time to implement it along with everything else that I need to do for the project.