Introduction:
The output pulses from a pulse transformer are subject to wave shape distortion due to various factors. These factors can include the transformer ratio, inductance, capacitance, and resistance. However, in this case, the decaying factor in the wave shape of the output pulses is primarily determined by the inductance of the pulse transformer.

Explanation:
When a pulse transformer is used to transmit electrical pulses from one circuit to another, it operates based on the principle of electromagnetic induction. The primary winding of the transformer receives the input pulses, while the secondary winding delivers the output pulses. The inductance of the transformer plays a crucial role in shaping the output waveform.

Inductance and Energy Storage:
Inductance is a property of an electrical circuit that opposes changes in current. In a pulse transformer, the inductance of the windings determines the energy storage capability of the magnetic field. When an input pulse is applied to the primary winding, the magnetic field stored in the inductor is energized. This energy is then transferred to the secondary winding, which generates the output pulse.

Decaying Factor:
The decaying factor in the wave shape of the output pulses refers to the rate at which the pulse amplitude decreases over time. This decay is primarily determined by the inductance of the pulse transformer.

When the input pulse ends, the magnetic field in the inductor starts collapsing, inducing an opposing voltage in the secondary winding. This induced voltage causes the current in the secondary winding to gradually decrease, resulting in the decay of the output pulse amplitude.

Factors Influencing the Decaying Factor:
While inductance is the primary factor influencing the decaying factor, other factors can also play a role. These factors include resistance, capacitance, and the transformer ratio.

- Resistance: The resistance of the windings and the core affects the rate of decay by dissipating energy as heat. Higher resistance can cause faster decay.
- Capacitance: The capacitance between windings and across the transformer can affect the decay rate by storing energy and modifying the impedance. However, it is not the primary factor in determining the decay.
- Transformer Ratio: The transformer ratio affects the amplitude of the output pulse but does not directly impact the decay rate.

Conclusion:
In summary, the decaying factor in the wave shape of the output pulses from a pulse transformer is primarily determined by the inductance of the transformer. While other factors such as resistance, capacitance, and transformer ratio can also influence the decay rate, it is the inductance that plays the most significant role.