How transistor can be used as an amplifier?
The emitter current caused by the input signal contributes the collector current, which when flows through the load resistor RL, results in a large voltage drop across it. Thus a small input voltage results in a large output voltage, which shows that the transistor works as an amplifier.
Which transistor is best for audio amplifier?
You could successfully build a audio amp from many different types of BJTs. It will be the circuit, not the transistor, that makes the amp work well. I’d pick jellybean parts like the 2N4401 (NPN) and 2N4403 (PNP) and stick with them for everything except for the final power output transistors.
How do you calculate intermediate frequency?
How to calculate Intermediate Frequency? Intermediate Frequency is a frequency to which a carrier wave is shifted as an intermediate step in transmission or reception is calculated using Intermediate Frequency = (Local Oscillation Frequency-Received Signal Frequency).
What type of transistor configuration is used in the intermediate stages of a multistage amplifier?
Choice of transistor configuration to be used for intermediate stages in a multistage amplifier depends on the maximum voltage gain provided by the configuration. hence CC configuration can not be used since a stage of CC amplifier gives voltage gain less than unity.
Which is better transistor or IC?
For high power and hifi – Transistors (Mosfets , IGBTs ) is better. For multichanel – ICs better as they come in compact package.
Can a transistor amplify DC?
Yes, transistors amplify DC. However, DC can only be amplified by BJT and not a FET. The input DC is amplified to the base, and this amplified current is extracted by at the collector.
What is the use of intermediate frequency?
In communications and electronic engineering, an intermediate frequency (IF) is a frequency to which a carrier wave is shifted as an intermediate step in transmission or reception.
What is the value of intermediate frequency?
Intermediate frequency (IF) is a frequency at which received carrier frequency is shifted for detection of message signal . The IF is generated by mixing the receive carrier with locally generated signal . In super heterodyne AM receivers , an intermediate frequency of 455KHZ is used .
Which transistor amplifier is most commonly used?
The common emitter amplifier
Of the three types of transistor configuration used in electronic circuit design, the common emitter is the most widely used because of its key attributes. The common emitter amplifier has the signal applied to the base and the output is then taken from the collector circuit.
Which transistor configuration is widely used as amplifier & Why?
Common emitter transistors are used most widely, because a common emitter transistor amplifier provides high current gain, high voltage gain and high power gain.
Which is best amplifier IC or transistor?
How many transistors does an amplifier have?
The standard 741 Op-amp circuit contains 20 transistors and 11 resistors. It starts with a differential input stage with a current mirror load. This is followed by an npn voltage amplification stage with an active output. A pnp emitter follower drives a push-pull emitter follower output stage.
Can I use transistor instead of MOSFET?
You can use it, but you will need a 12v power supply and a transistor to switch the gate. That mosfet only ‘just’ starts turning ON in the 3-4V range.
Why MOSFET are better than transistor?
mosfet consumes much less power when switching at high frequency because of its faster switching speed. this is due to the fact that the mosfet leads by grid-oxide controlled field effect and not by electron / hole recombination (which is slow) as in bjt. The gate control circuit is much simpler in the mosfets.
How much voltage can a transistor amplify?
A transistor can amplify current, or voltage, or both, depending on how it is configured in the circuit. A bipolar transistor configured as ‘Common Collector’ amplifies current, but not voltage. When configured as ‘Common Base’ it amplifies voltage, but not current. In ‘Common Emitter’ mode it can amplify both.
How to set the frequency on a car amplifier?
Amplifier Settings – Basics.
What is the function of intermediate frequency transformer?
What is a Transformer?
How to calculate amplifier RMS output?
you adjust the gain till distortion is just starting to appear in the o-scope display, Peak voltage would give you max watts, to figure RMS (Root Mean Square) you multiply the peak by 0.707, to get AVG output multiply the peak by 0.637, you can also use this to figure out how linear your push-pull stages are by figuring the negative side of the sine wave.
What is the frequency range of intermediate frequency?
Radio Receiver Basics. The first IF rejection specification refers to how well a receiver rejects radio signals operating on the receiver’s first IF frequency.