Filters
| Circuit / Schematic diagram of | Description |
| Band Pass | |
|
29.850 Band Pass Filter |
|
| Single OpAmp Band Pass filter | |
| Active Band Pass Filter | Time honored multiple feedback band pass (MFBP) type which uses capacitors of equal value and leads us to simplified calculations. |
| 24dB Band Pass Filter | Filter circuit along with power supply unit |
| Band Pass IF Filter | |
| Notch/Band Pass Filter | |
| Multiple Feedback Band pass filter | |
| Self Twining CW Filter | |
| Low Pass | |
| Low Pass Active Filter | OpAmp based low pass filter. |
| SSB AF Filter | This is a simple filter that restricts the LF response a little as well providing quite a heavy HF roll-off. |
| 1 MHZ Low Pass filter | The filter circuit uses no inductor. |
| Low pass filter | Filter tuned by a single resistor. |
| High Pass | |
| Second order high pass filter | |
| Notch | |
| Notch Filter | |
| Adjustable Notch Filter | They can be used in your small pre-amp or amplifier project to filter out any HUM at 50 Hz or 60Hz . |
| Variable Notch Filter | Variable notch filter with both high and low pass filter |
| Helical Resonator Notch Filter | |
| High Q Notch Filter | |
| RC Notch Filter | |
| Twin T Notch Filter | This allows us to remove the 50Hz hum picked up by, say, a microphone cord. |
| Transient Noise Eliminator | |
| Galaxy Noise Filter Schematic |