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Q&A High pass filter design

Despite there are many filter calculators available on the web, I still have difficulties to translate what I need into calculator design parameters. For my application, I need ideally a high pass ...

3 answers  ·  posted 4y ago by coquelicot‭  ·  last activity 4y ago by a concerned citizen‭

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#4: Post edited by user avatar coquelicot‭ · 2020-09-24T16:04:59Z (about 4 years ago)
  • Despite there are many filter calculators available on the web, I've still difficulties to translate what I need into calculator design parameters.
  • For my application, I need ideally a high pass filter that kill everything below 60Hz, and keep everything near 100Hz.
  • More mathematically, I would like a HP filter that keep 99% of the signal (voltage) at 90 Hz, and kill x % of the signal at 60Hz (say x = 98%, but I can compromise to reduce the complexity of the filter).
  • Other considerations are:
  • 1. I don't care of phase distortion
  • 2. active filter is OK
  • 3. max amplitude of the signal +/- 8V
  • 4. very weak current (it is to be the input of an oamp).
  • How the real pros would translate these needs into design rules for a calculator?
  • Despite there are many filter calculators available on the web, I still have difficulties to translate what I need into calculator design parameters.
  • For my application, I need ideally a high pass filter that kill everything below 60Hz, and keep everything near 100Hz.
  • More mathematically, I would like a HP filter that keep 99% of the signal (voltage) at 90 Hz, and kill x % of the signal at 60Hz (say x = 98%, but I can compromise to reduce the complexity of the filter).
  • Other considerations are:
  • 1. I don't care of phase distortion
  • 2. active filter is OK
  • 3. max amplitude of the signal +/- 8V
  • 4. very weak current (it is to be the input of an oamp).
  • How the real pros would translate these needs into design rules for a calculator?
#3: Post edited by user avatar coquelicot‭ · 2020-09-24T16:00:58Z (about 4 years ago)
  • Despite there are many filter calculators available on the web, I've still difficulties to translate what I need into calculator design parameters.
  • For my application, I need ideally a high pass filter that kill everything below 60Hz, and keep everything near 100Hz.
  • More mathematically, I would like a HP filter that keep 99% of the signal (voltage) at 90 Hz, and kill x % of the signal at 60Hz (say x = 98%, but I can compromise to reduce the complexity of the filter).
  • Other considerations are:
  • 1. I don't care of phase distortion
  • 2. active filter is OK
  • 3. max amplitude of the signal +/- 8V
  • How the real pros would translate these needs into design rules for a calculator?
  • Despite there are many filter calculators available on the web, I've still difficulties to translate what I need into calculator design parameters.
  • For my application, I need ideally a high pass filter that kill everything below 60Hz, and keep everything near 100Hz.
  • More mathematically, I would like a HP filter that keep 99% of the signal (voltage) at 90 Hz, and kill x % of the signal at 60Hz (say x = 98%, but I can compromise to reduce the complexity of the filter).
  • Other considerations are:
  • 1. I don't care of phase distortion
  • 2. active filter is OK
  • 3. max amplitude of the signal +/- 8V
  • 4. very weak current (it is to be the input of an oamp).
  • How the real pros would translate these needs into design rules for a calculator?
#2: Post edited by user avatar coquelicot‭ · 2020-09-24T11:37:19Z (about 4 years ago)
  • high pass filter design
  • High pass filter design
#1: Initial revision by user avatar coquelicot‭ · 2020-09-24T10:37:36Z (about 4 years ago)
high pass filter design
Despite there are many filter calculators available on the web, I've still difficulties to translate what I need into calculator design parameters.

For my application, I need ideally a high pass filter that kill everything below 60Hz, and keep everything near 100Hz.
More mathematically, I would like a HP filter that keep 99% of the signal (voltage) at 90 Hz, and kill x % of the signal at 60Hz (say x = 98%, but I can compromise to reduce the complexity of the filter).

Other considerations are: 
1. I don't care of phase distortion
2. active filter is OK
3. max amplitude of the signal +/- 8V

How the real pros would translate these needs into design rules for a calculator?