The Krohn-Hite 3A, 3B, 3C and 3D Series of continuous-time fixed-frequency precision active filter modules from Krohn-Hite provide filtering in a 1 to 16-pole compact package, with the choice of cutoff frequencies selectable within the frequency range from 1Hz to 2MHz low-pass and 1Hz to 600kHz high-pass.

Choose between Butterworth or Bessel responses, user-defined input and output gain from 1 to 100 in 1% increments (0dB to 40dB). Functions of low-pass, high-pass and band-pass. Each one factory tuned to a user-specified cutoff frequency, number of poles, response, function, single-ended or differential input gains and output gains.

Applications include: anti-alias filtering, data acquisition systems, aerospace (sonar and navigation), sound and vibration testing, medical electronics, communication systems, real and compressed time data analysis, noise elimination and signal reconstruction.

Available Packages: 3A Package: 1 to 4-pole. 3B Package: 4-pole with input gain and output gain; 5 to 8-pole, with no gain. 3C Package: 8-pole, single-ended or differential with input gain and/or output gain. 3D Package: 16-pole, single-ended or differential with input gain and/or output gain.