Ok once again here for a little guidance after hours of pondering.
question states "For the circuit shown in Figure 3, Zener diodes have the following characteristics. Determine and Draw voltage characteristics of the circuit."
First things first im assuming the voltage characteristics is a graph of Vi vs Current in the series circuit.?
the Zener diode characteristics can be found in the attached image of the workings and also the circuit diagram. i drew the zener diode charecteristics for visual aid to help me try to understand whats going on.
so what i have done is began to test voltages random Vd voltages that satisfy the top Id and Vd relationship (found in the image attached). and then substituted the Id value into the corresponding equation for the next zener diode in the series circuit. No matter what Vd i use (satisfying the vd condition) in the first equation and then substitute the corresponding current into an equation for the second diode (because it is a series circuit current must be the same through all compnents. but no matter what initial assumed Vd1 value the second diode will always be closed?
sort of a bit confused at the moment ? am i using the right id relationships for the corresponding diodes and voltages?(see working)
I have been using the top/1st Id Vd relationship for the first zener diode as a postive voltage would just result in the diode being a standard forward bias diode? and i have been using the third relationship for the 2nd diode with a + vi input voltage (same as D1)
Thanks/ ideas/ what am i missing here?
question states "For the circuit shown in Figure 3, Zener diodes have the following characteristics. Determine and Draw voltage characteristics of the circuit."
First things first im assuming the voltage characteristics is a graph of Vi vs Current in the series circuit.?
the Zener diode characteristics can be found in the attached image of the workings and also the circuit diagram. i drew the zener diode charecteristics for visual aid to help me try to understand whats going on.
so what i have done is began to test voltages random Vd voltages that satisfy the top Id and Vd relationship (found in the image attached). and then substituted the Id value into the corresponding equation for the next zener diode in the series circuit. No matter what Vd i use (satisfying the vd condition) in the first equation and then substitute the corresponding current into an equation for the second diode (because it is a series circuit current must be the same through all compnents. but no matter what initial assumed Vd1 value the second diode will always be closed?
sort of a bit confused at the moment ? am i using the right id relationships for the corresponding diodes and voltages?(see working)
I have been using the top/1st Id Vd relationship for the first zener diode as a postive voltage would just result in the diode being a standard forward bias diode? and i have been using the third relationship for the 2nd diode with a + vi input voltage (same as D1)
Thanks/ ideas/ what am i missing here?
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