0
It depends how "ideal" your ideal diode is.
The first approximation of an ideal diode is that it's a device that allows current to flow one way, and not the other way, while doing this with no losses.
The second approximation of a diode implies the inherent 0.7V drop across the device, as well as one way current flow, but with no loss resistance.
The third approximation of an ideal diode is a device which allows current to only flow one way through it, with a 0.7V loss across is, as well as a small internal resistance of a few ohms.
These all vary from a real diode because these are all linear, in every sense. You can neither calculate the voltage nor the current across/through a diode. Instead, you must use the diode's characteristic curve (given on datasheet), and linearize it. You can get any amount of current to flow through the diode the CORRECT direction, by changing the voltage used. A number of microamps will take perhaps, a third of a Volt.
Wiki User
∙ 12y ago
Wiki User
∙ 10y agoIdeal diode:
when Ideal diode is in forward biased condition it will conduct with out any voltage drop and resistance across the diode is zero. under reverse biased condition it will not conduct ,it is completely turn off
Real diode:
when the real diode is in forward biased condition it is not a perfect conductor with zero resistance because in real diode some resistance(few ohms) is present. under reverse biased condition it will take certain time to turn off
Add your answer:
Earn +20 pts
How is zener diode different from a conventional diode or ideal diode?
zener diode :zener diode operates under reverse bias voltageideal diode :ideal diode operates under forward bias voltage
Voltage-current characteristics of ideal diode?
An ideal diode would match the purpose of a diode without any of the drawbacks. The purpose of a diode is to control current flow - The diode "turns on" for current flowing in one direction, and "turns off" if current wants to flow in the other direction. Ideally, there would be no voltage drop across this diode when allowing current flow, thus no power loss. When the diode is "turned off" by a negative voltage, idealy there would be no current flow (no matter how large the negative voltage).
Can diode work as switch?
yes diode can be used as a switch as it conducts current in only one direction.it is a open switch when it reverse biased.and as aclosed switch when it is forward biased.but we consider diode as ideal .
What is the simplest way to visualize a diode?
The simplest way is the Ideal Model representation of a diode. Forward: V=0(short circuit),r'd=0,I=use Ohm's law. Reverse: V=Vbias(Open Circuit),I=0,r'R=0. Ideal model means it is acting as a switch.
Can schottky diode charge storage?
A schottky diode has non ideal properties. Among them is a capacitance (e. g. 900pF), which delays switching in case of a polarity reversal.
How is zener diode different from a conventional diode or ideal diode?
zener diode :zener diode operates under reverse bias voltageideal diode :ideal diode operates under forward bias voltage
Why you use real diode instead ideal diode?
Ideal components do not exist in the real world. They are only simplified descriptions of components used to create models to help understand the behaviour of components in circuitry. Its not possible to use something that doesn't exist.
What is the difference between an ideal zener diode and practical zener diode?
Zener diode is heavily doped pn junction diode.
Which diode have characteristics very close to that of an ideal voltage source?
zener diode
What is a real diode?
whether we know that p-n diode is real diode. But still in case of semeconductor we see then silics is real diode.
Voltage-current characteristics of ideal diode?
An ideal diode would match the purpose of a diode without any of the drawbacks. The purpose of a diode is to control current flow - The diode "turns on" for current flowing in one direction, and "turns off" if current wants to flow in the other direction. Ideally, there would be no voltage drop across this diode when allowing current flow, thus no power loss. When the diode is "turned off" by a negative voltage, idealy there would be no current flow (no matter how large the negative voltage).
Which diode has its characteristics very close to that of an ideal voltagesource.1.zener diode 2.vacuum tube diode 3. crystal diode?
The Zener diode has the characteristics of a constant voltage source.
How much forward diode voltage is there with the ideal diode approximation?
Consider ideal diode to be connected in series with resistor of 6kSilicon diode forward bias voltage = 0.7 voltsCurrent across 6k resistor = (5-0.7)/6000 amperesVoltage across {resistor + diode}=4.3 + 0.7=5vIf silicon internal resistance is 6k then voltage across diode=5vIf external resistance is 6k and diode resistance is negligible then voltage across diode=0.7v
List the two conditions under which a diode is operated?
A diode is a semiconductor material which has p region and n region. In order to "turn on" and conduct current in the forward direction, a diode requires a certain amount of positive voltage to be applied across it. An ideal diode conducts only when the diode is forward biased, and then the voltage drop across the diode (Vd) is zero. When the ideal diode is reverse biased, no current flows. The two conditions to operate a diode are: (a) Current flow is permitted; the diode is forward biased. (b) Current flow is prohibited; the diode is reversed biased. When the polarity of the battery is such that current is allowed to flow through the diode, the diode is said to be forward-biased.
Is zener diode an ideal current source?
A: An ideal current source can be defined as a short with immense current capabilities A zener has no such capabilities
Is real gas a gas?
A real gas is a type of gas that is different than an ideal gas. They have completely different interactions between their molecules.
Can diode work as switch?
yes diode can be used as a switch as it conducts current in only one direction.it is a open switch when it reverse biased.and as aclosed switch when it is forward biased.but we consider diode as ideal .
