Very low frequency active filter 5G28 schematic


Posted on Mar 28, 2007

As shown in FIG staggering low frequency active filter circuit. This is a fourth-order Butterworth low-pass active filters for filtered VLF random pulse noise voltage DC level


Very low frequency active filter 5G28 schematic
Click here to download the full size of the above Circuit.

signal on its cut-off frequency (-3dB) about 8Hz, at 18Hz at 20dB gain reduction. Intrinsic attenuation in the passband of 0.467. Input resistance is approximately 40k. Filter network using a number of resistors are metal film precision resistor in series. If one 1 F capacitor to achieve a considerable accuracy, the cutoff frequency fc close to the theoretical value.




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