Desirable characteristics of the ideal switch:
It is desirable to have power switches characteristics closer to ideal switch. The ideal switch should have the following characteristics.
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Zero resistance when the switch is on and infinite resistance when the switch is off.
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Instant switch on and instant switch off.
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Infinite current conduction in on state.
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Infinite voltage capability when the switch is in off state.
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Zero leakage current when the switch is in off state.
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Zero voltage drop when the switch is in on state.
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100% efficiency.
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Able to control power flow with zero power dissipation.