Tracking percent overload signal as indicator of output signal magnitude

摘要

Tracking percent overload signal as an indicator of output signal magnitude is achieved by measuring the percent of time the envelope of a varying modulated signal is above a predetermined programmable threshold. The technique is implemented by a level detector including an envelope detector along with circuitry for detecting when the envelope has exceeded the programmable threshold. The output of the level detector is sampled and fed to a counter which provides a digital output which indicates the percentage of time the envelope exceeds the set threshold.