Table of Contents
Current through a PNP Bipolar Junction Transistor, and a series load on the BJT’s collector side, can be set by the following.
- Current setting resistor between emitter and supply voltage (positive supply for PNP BJT).
- A voltage applied the PNP BJT Base.
- The voltage across the emitter resistor will be the voltage difference from Base voltage (set by trimpot in diagram) and +V, minus an additional 0.6V due to Emitter to Base drop.
- That voltage, will cause current to flow through the resistor based on ohms law: I (current) = V/R.
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