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The transistor is a "single direction current flow" device. Typically, for an NPN device, the collector must be more positive than the emitter for the device to bias on. You could use the transistor in an AC circult, but it would only conduct on half the cycle.
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How do you reduce 12 volts to 3.7 volts?
If the voltage is AC a transformer can be used.
What is the voltage used in Uganda?
It is 240V / 50Hz AC. The plug/socket used is like the one used in Great Britain.
Why gain increases in low frequency region in BJT?
Because Beta (current gain) in a transistor is inversely proportional to frequency. Hence it increases as frequency decreases. Also the ac voltage gain is directly proportional to Beta.
How diode can be used as switch?
No, a diode can rectify an AC signal but is not able to amplify an AC signal. Diodes are two layer devices whereas transistors have three. It is this very thin 'base' region in the transistor that gives it the ability to give a voltage or current gain.
Why capacitor in transistor amplifier circuit at input?
Because capacitor not allow to pass dc voltage,but capacitor allow ac voltage and signal.Purpose is to block dc voltage.That is coupling condenser.
Why you add a positive voltage to the ac signal to allow a transistor to amplify ac signal?
It depends on how you bias the transistor. If you ground the emitter, which is very common, you will need to offset the input signal so you can amplify the full voltage swing.
Why Bypass capacitors used in electronic amplifier?
A: A transistor needs a bias or voltage to operate in a linear region unfortunately that is detrimental to gain so by bypassing this emitter voltage the AC gain can be improved.
Can transistor be used to increase the strength of an ac signal?
Yes, a transistor can amplifiy an a.c. signal.
What are power converters used for?
Power converters are used to change electrical energy from one form to another. It could be changing the voltage or frequency or it could be switching between AC and DC.
Which is used for ac to ac convertion?
electrical voltage
How do you build a dc to dc converter?
A DC to DC converter is basically a type of switching power supply. The switcher converts the input DC to AC. A transformer is used to convert the AC to the desired voltage. A rectifier, filter, and optional regulator is used to convert the AC back to DC.
What is the ac equivalent circuit for a transistor?
Transistor are DC output, Triac are AC output.
What are the instruments for the study of the gain of a two stage RC Coupled transistor amplifier?
depends on whether you would like calculate or measured results. if you want calculated resulted, then your best bet would be to use an oscilloscope. if you want calculated results, then there are formulas for finding out the voltage, current, impedance, and individual results from each component using the capacitive reactance, voltage, and type of transistor. are you using a summing transistor, inverting amplifying transistor, amplifying transistor, or a different transistor? also are you using DC or AC voltage or current? you need to tell me what type of transistor you are using?
Transistor work on ac or DC?
Transistors are typically operated in one of two (well, four) regions: saturation/cutoff or linear (forward or reverse). When used as amplifiers, transistors are operated in the linear region. If you look at a transistor's V-I (voltage - current) characteristic, you'll see the linear region is somewhere "in the middle", where there is sufficient voltage applied (so current flows), but not to much (so the transistor is not saturated). To get transistors to operate in this middle region, DC circuits are used to bias the transistor to the center of the linear region. So the transistor is working on both AC (the signal applied to the input that is amplified at the output) and DC (the biasing network to allow the transistor to operate as a linear amplifier). When used in saturation/cutoff, the transistor is being used as a switch (on/off). this is common in logic devices (gates, arrays, CPUs, etc.). The input to these devices is typically an irregular AC wave (a square wave of information). A power source is needed that is DC, however, to provide the power to drive the output to one state or the other. So proper transistor operation requires both AC (as the signal) and DC (as the biasing network, or power source).
What voltage is used in Ireland?
The voltage used in Ireland is 220V AC, at 50Hz.
What are the two main uses of a transistor?
a) to act as a switching device; a change in the bias voltage at the base- emitter junction can cause an increase in signal flowing through the transistor through the collector terminal and this cause the output voltage at the collector terminal to change; eg to drop to a low voltage level, this is seen as the transistor device switching on to maximum conduction rate and a low level output at the collector. b) to act an amplifer . whether the input signal is an ac type signal in which case its a signal power amplifer function; eg sound amplifer control circuits , or whether a dc input signal, in which case the input dc signal is amplfied to be reproduced as a bigger signal at the output collector terminal
How does a capacitor allow ac?
A capacitor allows AC (to pass through) because capacitors resist a change in voltage. The equation of a capacitor is ... dv/dt = i/c ... meaning that the rate of change of voltage in volts per second is equal to current in amperes divided by capacitance in farads. The simplified explanation (using more words) is that, when a DC voltage is applied to a capacitor, it ultimately charges to that DC voltage and, at equilibirum, presents a large impedance, but when an AC voltage or step change is applied to a capacitor, it initially presents a low impedance, allowing the AC or step to pass through. If you have an AC signal riding on top of DC, the capacitor will stabilize to an output DC offset of zero while passing the AC. This is useful, for instance, when coupling an AC signal to the input of a transistor amplifier, while allowing the base bias circuit to keep the transistor in its intended bias state, while at the same time allowing the AC signal to pass through into the transistor and be amplified.
