Oscilloscope Watch Teardown. Agenda. History and General overview Hardware design: Block diagram and general overview Choice of the microcontroller Design of the analog frontend Design of the waveform generator Design of the power stage Firmware design:
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Xprotolab: World’s Smallest Oscilloscope
Block diagram and general overview
8bit vs 32bit ?
Additional gain is done in the micro’s ADC
Front end bandwidth
Approximately 320kHz, but the micro’s capacitance and
ADC characteristics lowers it to about 200kHz
Bandwith is 50kHz, determined by the RC feedback
AN1149 description of the circuit
Battery supplies system load when power source is absent
Architecture block diagram
Microcontroller's Power Budget