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Does a transistor in cut-off region acts as an open switch?
No
How is an transistor used as a amplifier?
Voltage is applied between the collector and emitter. A signal is applied between the base and emitter. The input signal will control how much the transistor turns on and the larger current flowing across the Collector/Emitter will be the same, but larger, than the input. Therefore amplified.To keep the transistor switched on and to prevent the input signal switching it off, the transistor has to be biased on. This is usually done with a network of resistors on the base, raising the voltage to keep it conducting.
When operated in cut off and saturation mode the transistor acts like what?
switch
What are the uses of transistor in circuits?
Basically each and every amplifier circuit is made up of coupling or use of transistors. The amplifier amplifies the signals because transistor makes either voltage or current to rise as a result of either of it's regions of operation i.e. open circuit(cut off region) or short circuit (saturation region) Both the operation regions are not required continuously. Hecne the transistor works in either saturation or cut off regions only when emitter-base junction is forward biased, which can be applied as per requirement. APPLICATIONS OF TRANSISTOR AND HENCE AMPLIFIERS ARE : OSCILLATORS, LOUD-SPEAKERS, POWER AMPLIFIERS, VOLTAGE AMPLIFIERS, CURRENT AMPLIFIERS, ANALOG TO DIGITAL CONVERTER, DIGITAL TO ANALOG CONVERTERS
What is CMOS FET transistor?
CMOS stands for 'Complementary Metal Oxide Silicon' and is the construction method of the device. FET stands for 'Field Effect Transistor'. Although it is a transistor and is used in a similar fashion, it is totally different in the way it is controlled and biased. The pin outs are named differently. A bipolar transistor has a Base Emitter and Collector. A FET has a Drain Source and Grid. Current is controlled between the 'Source' and 'Drain' by altering the voltage on the grid. It works in a similar way to the old vacuum tube valves and is why the control is called a grid. It forms a 'pinch off' effect, in the path between the source and drain, instead of the depletion layer in a normal transistor.
The value of r when a transistor is biased to cut off is -?
Collector-to-Emitter resistance is high when the transistor is biased off.
What is the value of Ic when transistor is in cut off region?
Zero, or close to zero.
When both junctions of NPN diode are reverse biased then the diode is in which mode?
Transistor will be in OFF mode.
When the both junction of npn diode is reverse biased then the diode in which mode?
Transistor will be in OFF mode.
When both junctions of NPN diode are reverse biased then diode is in which mode?
Transistor will be in OFF mode.
When does the transistor gets cut-off?
the magical number is .6v
Does a transistor in cut-off region acts as an open switch?
No
How is an transistor used as a amplifier?
Voltage is applied between the collector and emitter. A signal is applied between the base and emitter. The input signal will control how much the transistor turns on and the larger current flowing across the Collector/Emitter will be the same, but larger, than the input. Therefore amplified.To keep the transistor switched on and to prevent the input signal switching it off, the transistor has to be biased on. This is usually done with a network of resistors on the base, raising the voltage to keep it conducting.
When operated in cut off and saturation mode the transistor acts like what?
switch
What is transistor as a switch?
transistor is a nonlinear device. it will acts as a swicth based on the cut in voltage we can easily identifying the the transistor is in forward or reverse bias.in forward it is 'on' reverse bias 'off'.
Why biasing a transistor?
We bias transistors in order to determine the modes of operation ( that is whether the transistor is operating in the active cut off or the saturation regions).
How many states does a transistor have?
A transistor can be in three conditions or states. It can be active (at a voltage higher than the emitter), in saturation or cut off (no current).
