What is H parameter model?

H-parameters are one system for characterizing bipolar transistors. That means it is the ratio of output to input in the common emitter configuration, which in turn means it is the ratio of collector current to base current, which is basically the gain of a bipolar transistor.

How do you solve for H parameters?

v1 = h11 i1 + h12 v2 (i) i2 = h21 i1 + h22 v2 (ii) In these equations, the hs are fixed constants for a given circuit and are called h parameters. Once these parameters are known, we can use equations (i) and (ii) to find the voltages and currents in the circuit.

What is H parameter in two port network?

h parameter of two port network is a square matrix of order 2×2. Basically it is a way to represent a two port network. It is also known as hybrid parameter. In this form of representation, voltage of input port and current of the output port is expressed in terms of current of input port and voltage of output port.

How do you find H parameters of CE configuration?

h-Parameters for all three configurations:

1. Transistor can be represented as two port network by making anyone terminal common between input and output.
2. hie = h11e– input resistance in CE configuration.
3. hfb = h21b – short circuit current gain in CB configuration.

How to define the h-parameter model in BJT?

The h-parameter model is defined by: V1 h11 h12 I1 = I2 h21 h22 V2 V1 = h11I1 +h12V2 (KVL) I2 = h21I1 + h22V2 (KCL) The h-parameter model for the common emitter circuit is on the right.

How is the h-parameter model used in a circuit?

The h-parameter model will be applied to a single common emitter (CE) stage with the emitter resistor (RE) bypassed. The model will be used to build equations for voltage gain, current gain, input and output impedance. The circuit is shown below:

How are BJT models used in TTL circuits?

The BJT model is used to develop BiCMOS, TTL, and ECL circuits. For BiCMOS devices, use the high current Beta degradation parameters, IKF and IKR, to modify high injection effects. The model parameter SUBS facilitates the modeling of both vertical and lateral geometrics. Model Selection To select a BJT device, use a BJT element and model statement.

How are two port networks used in BJT model?

TWO PORT NETWORKS – h-PARAMETER BJT MODEL The circuit of the basic two port network is shown on the right. Depending on the application, it may be used in a number of different ways to develop different models. We will use it to develop the h-parameter model.