What is equivalent circuit of UJT?

The working of UJT can be understood by its equivalent circuit. The voltage applied at the emitter is indicated as VE and the internal resistances are indicated as RB1 and RB2 at bases 1 and 2 respectively. Both resistances present internally are together called as intrinsic resistance, indicated as RBB.

How is RB2 calculated in UJT?

UJT parameters In simple words, it is the resistance of the N-Type bar when measured lengthwise. If RB1 is the resistance of the bar from E to B1 and RB2 is the resistance of the bar from E to B2, then RBBO can be expressed as RBBO= RB1 +RB2.

How do I find my VP in UJT?

The peak voltage Vp will be usually one diode drop (0.7V) plus the gate to cathode voltage (Vg). Peak voltage can be expressed using the equation: Vp = 0.7V + Vg = 0.7V + VR1 = 0.7V + ηVbb .

What is the relationship between RB1 and IE in UJT?

The Unijunction Transistor (UJT) will act as voltage breakdown device, when the input applied between emitter and base 1 reduces below breakdown value i.e., RB1 increases to a higher value. This shows that RB1 depends on the emitter current and it is variable.

Which is the equivalent circuit of the UJT?

The equivalent circuit of the UJT is shown in the Figure B. The resistance between terminal base 1 and base 2 with emitter open is called as inter – base resistance ( RBB ). Therefore RBB = RB1 + RB2

How to calculate the equivalent circuit of Thevenin?

Steps to calculate Thevenin’s equivalent circuit. Remove the load resistance. After short circuiting all the voltage sources and open circuiting all current sources, find the equivalent resistance (R th) of the circuit, seeing from the load end. Now, find V th by usual circuit analysis. Draw Thevenin’s equivalent circuit with V th, R th and

How to calculate Thevenin resistance in Norton equivalent?

Thévenin’s And Norton Equivalent 1 Calculate Vth in original circuit using open circuit condition 2 Second, reduce the load resistance to zero (short circuit). Condition, if more short circuit access the terminal and in… 3 Calculate the (Current Short Circuit) the general circuit Isc 4 The Thévenin resistance Rth can be calculated as More

When to use Thevenin’s theorem in Electrical Engineering?

Thevenin’s Theorem is especially useful in analyzing power systems and other circuits where one particular resistor in the circuit (called the “load” resistor) is subject to change, and re-calculation of the circuit is necessary with each trial value of load resistance, to determine voltage across it and current through it.