- #1
EvLer
- 458
- 0
In Zener diodes, what is Rz?
Could someone give me an idea how it is modeled, i.e. an equivalent circuit?
Thanks.
Could someone give me an idea how it is modeled, i.e. an equivalent circuit?
Thanks.
In a Zener diode, Rz refers to the dynamic resistance of the diode. This is the resistance that the diode exhibits when it is operating in the reverse breakdown region.
Rz is an important parameter in Zener diode modeling because it affects the overall performance of the diode in its reverse breakdown region. It is used to calculate the diode's voltage and current characteristics, which are crucial for circuit design and analysis.
Rz can be determined experimentally by measuring the voltage and current across the Zener diode while it is operating in the reverse breakdown region. It can also be calculated using the diode's voltage and current characteristics and Ohm's law.
The equivalent circuit for a Zener diode includes a series combination of a Zener diode and a resistor Rz, representing the dynamic resistance of the diode. In some cases, an additional parallel resistor is included to account for leakage current.
Rz plays a crucial role in the stability of a Zener diode. A lower Rz value indicates a more stable diode, as it can maintain a constant voltage across the diode even with changes in current. A higher Rz value can lead to voltage fluctuations and affect the performance of the diode in its reverse breakdown region.