006 Capacitor current source voltage ramp – LM334

Capacitor constant current voltage ramp diagram by Electronzap Electronzapdotcom
Capacitor constant current voltage ramp diagram by Electronzap Electronzapdotcom

Capacitor voltage ramps are easily made with a constant current source/sink. A steady amount of current changes the capacitor voltage steadily based on the amount of current in amps and the capacitance in Farads. A 1 Farad capacitor will change voltage by one volt every second that it is being charged/discharged 1 amp of current.

Brief charging capacitor voltage ramp circuit using LM334 current source

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Power supply I use in my videos.

Video:

Electronics course 6 capacitor and current source voltage ramp circuit fragment

Diagram used in video below

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



Nice looking larger value capacitor kit.

It is common to refer to any steady current as a constant current source, or simply current source. To be more accurate though, a current source is on the more positive side of the load, or other circuitry, that is depending on it to set the current. Whereas a current sink is on the more negative side of the circuit than the load, or other circuitry, that depends on it to set a current.

Primary voltage ramp properties

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



White version of the oscilloscope that I use in many of my recent videos.


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