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App Note: Various solutions for calculating a pulse and duty cycle

Posted on Sunday, December 16th, 2012 in app notes by DP

MCPapp

Here’s an app note from Microchip describing various methods for measuring pulse in periodic and non-periodic waveforms. Calculating duty cycle in periodic waveforms is also described.

Many times it is desirable to quantify the pulse  width of a periodic signal, such as that of a servo motor or duty cycle of a pulse-width modulated signal. There are other instances where a pulse that is non-periodic needs to be measured, such as those commonly found in a Capacitive Discharge ignition circuit. This application note describes six different strategies to measure a pulse of both periodic and non-periodic waveforms as well as six methods for calculating a duty cycle of a periodic waveform using an 8-bit PIC device.

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