Recent questions tagged ujt

Description : With neat diagram explain synchronized UJT triggering circuit.

Last Answer : Line Synchronized UJT triggering circuit: The UJT is almost ideal as a firing device for SCRs. There are 2 main reasons for the compatibility between UJTs and SCRs. Firstly, the UJT produces a ... , the SCR is sure to have the right polarity between the anode and cathode for turning on.

Description : Describe triggering of SCR using UJT relaxation oscillator. 

Last Answer : I need it's operation

Description : State the main difference between PUT and UJT.

Last Answer : Difference between PUT and UJT: (i) The intrinsic stand-off ratio of a UJT is fixed hence operating characteristics cannot be alterd. The PUT, on the other hand has operating characteristics that ... time, which allows faster rise in current and provides healthy output pulses as compared to UJT.

Description : Draw and explain the characteristic of UJT. 

Last Answer : UJT Characteristics: The UJT characteristic is emitter voltage versus emitter current characteristic, as shown in the figure. There three operating regions in UJT  1.Cut off region: For ... in IE will place the device into saturation and hence after valley point there is valley point. 

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