Ujt as a relaxation oscillator , Electrical Engineering

Assignment Help:

UJT as a  relaxation  oscillator

The UJT  is a highly  efficient  switch  it is  used as trigger  a device for SCR. No sinusoidal oscillators saw tooth generators phase control  and timing circuits. Since  UJT  shows negative resistance characteristics it is mostly used  as  a relaxation oscillator.  Relaxation oscillator. Initially the voltage  across capacitor is zero  hence UJT  is off in this condition a small  reverse leakage  current  as a emitter current will be  flowing. As shown  in capacitor  C will  begin  to charge by VBB through  resistor R.


Related Discussions:- Ujt as a relaxation oscillator

Determine current for a bjt, Q. For a BJT with vBE = 0.7V, I CBO = 4 nA, ...

Q. For a BJT with vBE = 0.7V, I CBO = 4 nA, i E = 1 mA, and i C = 0.9 mA, evaluate α, iB,iSE, and β.

The central processing unit - stepper motor , The Central Processing Unit ...

The Central Processing Unit The  central processing  unit  is the brain of whole PLC.  The CPU  consist of a microprocessor memory  chip  and other  integrated circuits to con

What do you understand by dram and its refreshing, What do you understand b...

What do you understand by DRAM and its refreshing? Dynamic RAM (DRAM) is fundamentally the same as SRAM, but this retains data for only 2 or 4 ms on an internal capacitor. But

Digital, #quesFind a minimum two level, multiple-output AND-OR gate circuit...

#quesFind a minimum two level, multiple-output AND-OR gate circuit to realize these functions (eight gates minimum). F1(a,b,c,d) =Sm(10,11,12,15) +D (4,8,14) F2(a,b,c,d) =Sm(4,11

Obtain the complete solution for the voltage, Consider the circuit of Figur...

Consider the circuit of Figure and obtain the complete solution for the voltage v C (t) across the 5-F capacitor and the voltage vx(t) across the 5- resistor.

3-phase bridge inverter, 3-phase  Bridge Inverter In 3-phase bridge in...

3-phase  Bridge Inverter In 3-phase bridge inverter six thyristors an six diodes are used as shown in figure  a capacitor at input terminal is connected so that the input volta

Power, what is reactivecpower

what is reactivecpower

Define some huntington postulates - boolean algebra, Define some Huntington...

Define some Huntington postulates - Boolean Algebra? Postulates 1. Commutative Law (a) A + B = B + A (b) A B = B A 2. Distributive Law (a) A (B + C) = A B + A

How many bits are required, This problem concerns entropy There are hund...

This problem concerns entropy There are hundred students in a midterm exam. There are 5 grades and the number of students having each grade is shown below. At a min

Explain working of biased clamper, Q. Explain working of Biased Clamper? ...

Q. Explain working of Biased Clamper? Biased Clamper : The circuit of a positively biased clamper is shown in the figure. During the negative half cycle of the input signal the

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd