![]() ![]() Hence, we can say that it is ideal for applications that require low to medium current. Therefore, when the 2N2222A transistor is fully biased, then it allows a maximum of 800 mA current to flow across the collector emitter. It also offers a constant DC collector current like 800 mA. It is accessible in the package of To-92. It is a current controlled transistor, specially outlined to have fairly high speed even in low power, low to medium current, and medium voltage. Since it’s an NPN transistor so the collector and emitter are reverse biased and the base is forward biased. It is a common NPN Bipolar Junction Transistor i.e., one P-doped layer stands between the two N-doped layers. Like every other amplifier, even a 2N2222A transistor is also used for amplification and switching. Working Principle of 2N2222A Transistor.Uses 1k for input resistor, and 10k for feedback, so gain of -10. Here is inverting opamp amplifier and frequency response. * Use realistic square wave with rise time/ fall time 50n Should get graph showing large negative current spikes indicating backwards current flow in diode as shown below in graph of simulation. Use this netlist as source, then "run", then "plot vout vin". Here is a diode circuit for investigating the reverse recovery time. *vvvvvvvv Included SPICE model from 2N3904.mod vvvvvvvv ![]() * provides advanced spice netlisting capability. Here is a spice netlist for a 2-transistor negative feedback amplifier. Also google spice and go to links like this.ĭiode 1N4007 *vvvvvvvv Included SPICE model from 1N4007.mod vvvvvvvv Spice Stuff Spice Stuff: diode and transistor models netlist examples for feedback amplifier, reverse recovery time of diode, and opamp amplifierĬlick for a tutorial example and gschem with opamp. ![]()
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