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Unijunction transistor working performance speed measurement

2016-05-06 15:26  
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Unijunction transistor working performance speed measurement circuit
Measured single-junction transistor VBT ( set: BT33) and R3, C2 form relaxation oscillator. When VBT gets conduction, transistor VT1 obtains bias current by the bias resistor R2 ( S1 is OFF, S2 is closed), the light - emitting diode H1 emits light. +10 V power supply charges for C2 by R3 and VD2. The voltmeter V measured voltage across C2 will rise over time, when the E terminal potential reaches peak voltage of VBT, the VBT's E to B1 will be automatically turned on.