006: Capacitor current source voltage ramp using LM334

Capacitor voltage ramps are easily made with a current source/sink.

  • Steady current charging/discharging a capacitor will change the capacitor’s voltage steadily. A steady voltage change is commonly called a ramp.
  • LM334 is a 3 terminal current source component. One resistor is used to vary the amount of current it will pass. This will be the current through all series components as long as they don’t block too much power from the LM334.

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There’s a video below the diagram. The RC time constant part of the diagram was covered on my circuit fragment 5 page. A list of pages is included at the bottom of every page of this site.

Basic electronics circuit fragments and simple circuits 4 capacitors changing voltage based on capacitance and current diagram by electronzap electronzapdotcom
Basic electronics circuit fragments and simple circuits 4 capacitors changing voltage based on capacitance and current diagram by electronzap electronzapdotcom

YouTube video covering this topic.

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Electronics course 6 capacitor and current source voltage ramp circuit fragment

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