| Bricolo |
I've seen the same, with the resistances and caps inverted (caps instead of the resistances, and resistances instead of the caps)
but never this one
what it is used for? |
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| jackinnj |
| looks like the beginning of a phase shifter. |
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| phase_accurate |
Hi Bricolo
If we don't know more we can't definitely tell.
I.e. if it is driven by a low-impedance source then it is simply an integrator and the resistor from input to output is obsolete.
But I assume that there was more at the input and so we'd like to know more in order to be able to tell you.
One possibility would be part of a bandpass filter.
Regards
Charles |
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| Bricolo |
this op amp is (was :xeye: on my soundcard)
before the 1st resistor: a 12K resistor and the dac's output
at the output: an output cap (200µF) and the speaker jack |
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| fdegrove |
Hi,
Looks like an active phase-shift compensation network to me.
Cheers,;) |
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| Bricolo |
since the same with caps and resistors inverted is a band pass
wouldn't this one be a band reject filter? |
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| AndrewJ |
with the 12k resistor, this circuit is simply an active 1st order low pass filter. Without component values though it is not possible to determine the cut-off frequency.
Andrew |
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