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When we use a transistor as a switch, we will be operating it in either an "all on" or an "all off" mode. Depending on the transistor, we'll just apply some "maximum" base voltage to drive it into saturation and allow for maximum collector current, or we'll not apply any base voltage and the device will not be conducting any current through it. That's the "on and off" of it. This idea applies to the "standard" transistor. Things change a bit for FETs and some other devices, but the concept of using the device in an "all on" or "all off" state is common to the application of all devices acting as switches. We either turn them "all the way on" or "all the way off" via the base, gate or applicable terminal of the device.
What else can I help you with?
How transistor act as a switch?
A: When a transistor is saturated current can flow in both direction qualifying it as a switch
Why transistors are designed?
For switching applications transistor is biased to operate in the saturation or cutoff region. Transistor in cutoff region will act as an open switching whereas in saturation will act as a closed switch.
Is a transistor a small electronic switch?
A transistor is used to switch electronic signals.
What is the purpose of the Unijunction Transistor?
A Unijunction Transistor is a transistor that acts solely as a switch.
Within a CPU a transistor act as?
In a microprocessor, field-effect transistors behave as electrically-controlled switches.
Why a transistor acts as a switch?
Only because the circuit that its embeded in is designed that way. Remember, a transistor is basicly an amplifier ... only if you design everything to go to the extreams will it act as a switch.
What is transistor BC557?
it is a transistor used in IR TOGGLE SWITCH. :-)
Why a transistor is used as a amplifier and switch?
transistor has 2 output 1 and 0 so can be used as a switch
What are thermal transistors?
Thermal transistor is an efficient heat control device which can act as a heat switch as well as a heat modulator.
What is Transit time in transistor or diode?
A transistor is a switch. A diode directs the flow of current.
What electronic component is a gate or switch for electrical signals?
Transistor or vacuum tube.
How transistor acts as a amplifier?
A transistor does not act as an amplifier. It is used as a component in an amplifier circuit.
