TWO PORT NETWORK PARAMETERS (Y PARAMETERS) ECS LAB

AIM:  To determine “Y” parameters of a given two port passive network.

APPARATUS REQUIRED:

Sl. No.	Name of the Component	Specifications	Quantity
1	Resistors	1 KW	2
		2.2 KW	1
2	R.P.S.	0-30 V	1
3	D. C. Voltmeter	0-50V	1
4	D.C Ammeters	0-50 mA	2
5	Bread board		1

THEORY:

Y – Parameters:

         Y-parameters are also known as admittance or short circuit parameters. If we chooseV₁ and V₂ as independent variables and I₁ and I₂ as dependent variables then the network can be characterized by the given equation

                   I₁  = Y₁₁ V₁ + Y₁₂ V₂

                   I₂  = Y₂₁ V₁ + Y₂₂ V₂

PROCEDURE:

Y – Parameters:

1. Connect the circuit as shown in fig.4.c connect the variable voltage at port 1. Short-circuit the port 2.  By varying the V₁, note down the I₁, I₂ and tabulate
2. Connect the variable voltage at port 2, short circuit the port 1 as shown in  fig.4.d
3.  By varying the V₂, note down the I₁, I₂ and tabulate 

PREACAUTIONS: 

1. Connect the circuit elements as per the circuit diagram

2. Avoid loose connections of the circuit elements

3. Take the readings carefully and accurately

      4. Do not tamper the circuit elements.

OBSERVATIONS:               

   Y – Parameters:

    When V₂ = 0

Sl No.	V1 (Volts)	I1 (mA) Theoretical	I2  mA) Theoretical	I1 (mA) Practical	I2  mA)  Practical	Y11(mho) Theoretical	Y21(mho) Theoretical	Y11(mho) Practical	Y21(mho) Practical
1.	5
2.	10
3.	15
4.	20
5.	25

When V₁ = 0

Sl No.	V2 (Volts)	I1 (mA) Theoretical	I2  mA) Theoretical	I1 (mA) Practical	I2  mA)  Practical	Y12(mho) Theoretical	Y22(mho) Theoretical	Y12(mho) Practical	Y22(mho) Practical
1	5
2	10
3	15
4	20
5	25

                                                     

RESULT: