
Categories

Platforms

Content
1.) The frequency response of an (ideal) integrator is not constant but drops with 20dB/dec............... probably the frequency response of my integrator will be constant over this range.
..........in the AD620 data sheet the gain in this range is constant
Integration means: Phase shift of 90 deg Therefore my question: Which accuracy do you require?
More than that, the data sheet contains no information about the gain of 1E4 (frequency response, slew rate).
Yes  of course. The ideal integrator function 1/jwT exhibits a magnitude drop of 20 dB/dec and a constant phase of 90 deg (+90 deg for an inverting integrator).Hi LVW
Phase shift of 90, what at all frequencies?
cheers Adam
Yes  but the problem is: It is not possible to realize an (ideal) integrator. It always will be a low pass filter (however, with a rather small corber frequency).Guys, look up the Wikipedia article on Rogowski coils. I think he intends to use the integrator as an actual integrator rather than a kind of filter.
Yes  of course. The ideal integrator function 1/jwT exhibits a magnitude drop of 20 dB/dec and a constant phase of 90 deg (+90 deg for an inverting integrator).
However, a real intergator (based on a real opamp) has a phase characteristic which is near 90 deg and crosses the 90 deg at one single frequency only.
Therefore, my question in post#6.
Guys, look up the Wikipedia article on Rogowski coils. I think he intends to use the integrator as an actual integrator rather than a kind of filter.