S studystudystudy New Member Jul 14, 2010 #1 i using two zener diode having 5V breakdown voltage as a limiter two zener diode is parallel with each other but the one of the zener diode polarity is inverse. if i connect to the input AC voltage, its should limit the voltage to 5V if the input is exceed 5 voltage. i simulate it in the Multisim, but the output always same with the input no matter the input value is exceed or lower the breakdown voltage. why this happen?
i using two zener diode having 5V breakdown voltage as a limiter two zener diode is parallel with each other but the one of the zener diode polarity is inverse. if i connect to the input AC voltage, its should limit the voltage to 5V if the input is exceed 5 voltage. i simulate it in the Multisim, but the output always same with the input no matter the input value is exceed or lower the breakdown voltage. why this happen?
audioguru Well-Known Member Most Helpful Member Jul 14, 2010 #2 Multisim has many problems. You found one.
B BrownOut Banned Jul 14, 2010 #3 The zener resistance breaks down. You need fixed resistors in series to create a voltage divider.