High end oscilloscopes with a GHz or better bandwidth generally offer multiple input low pass filters, some analog and some digital. Noise or enhanced resolution (ERES) digital filters are digital low ...

Howdy, Any pointers to good resources on audio filters for WAV files (particularly low-pass filters) implemented in Java? I've found a goodly amount of resources on DSP and filters, but when it ...

Figure 1 Simple PWM processor with a low pass filter built with resistors and capacitors, this filter structure can implement real poles only.

After that, digital post-processing is done on the output, which removes noise caused by the system’s power supply, among other things, and essentially acts as a second low-pass filter.