Zener Diode Flashcards
The zener diode acts like a closed switch when ______
When the zener is _______, it operates like an open switch.
The zener diode acts like a closed switch when forward biased.
When the zener is reverse biased, it operates like an open switch.
What happens when the reverse biased voltage is higher than Vz (breakdown)?
When the reverse biased voltage is higher than Vz (breakdown), the diode acts as a resistor, always having a voltage drop equal to Vz.
What is the schematic symbol for the zener diode?
What is the Eout if D1 has a Vz of 15 volts?
-15 V
The zener diode is reverse biased beyond Vz. The action of D1 regulates the voltage output to the Vz value.
What is the Eout if D1 has a Vz of 10 volts?
.7V
The zener diode is forward biased. The action of D1 is like a closed switch.
A forward biased diode requires approximately 0.7 V to overcome the barrier potential, the actual voltage out is 0.7 V.
Zener diodes are primarily used as _______.
Zener diodes are primarily used as voltage regulators.
To check the forward bias resistance, set the range of an analog multimeter to X1 or X10. The resistance reading will be _____.
Low
To check the reverse bias resistance below Vz, set the range of an analog multimeter to X1 or X10. The resistance reading will be ______.
high or infinity
What is Eout if D1 has a Vz of 12 V?
-12V
With -9 V applied to this circuit, what would Eout be?
-8V
A zener diode is forward biased when _______.
the cathode is more negative than the anode
the anode is more negative than the cathode
Ea is less than Vz
Ea is greater than Vz
the cathode is more negative than the anode
