About the article

Wideband Waveform Generator

This circuit is designed to provide a wideband digital sine wave signal source. Its main feature is that because it synthesises the signal in 32 steps, no low-pass filter is required to suppress the odd harmonics. A well-known method for synthesising a sine wave under control of an input frequency is to apply a low-pass filter to a square wave of the same frequency. Along with the fundamental, this includes odd harmonics. After filtering out these parts of the signal we are left with a clean sine wave at the desired frequency. Unfortunately, the corner frequency of the lowpass filter limits the usable range of frequencies.
Downloading of this magazine article is reserved for Elektor Members only.
Already a member? click here to log in.
Loading comments...