reconstructionfilter
A reconstruction filter is a low-pass filter placed after a digital-to-analog converter to recover a continuous-time signal from a sequence of discrete samples. Its primary function is to suppress spectral images that arise from sampling and to smooth the stepped output into a faithful analog waveform.
In theory, ideal reconstruction uses sinc interpolation, which would perfectly reconstruct the original signal if the
Implementation typically involves an analog low-pass network realized with resistor-capacitor (RC), inductor-capacitor (LC), or active op-amp
Design considerations include selecting a cutoff near fs/2 while accounting for filter roll-off, passband flatness, and
Applications of reconstruction filters span audio DACs, video and communications systems, and precision instrumentation where accurate