Advertisements
Advertisements
Question
Draw a circuit diagram for studying the input and output characteristics of a n-p-n transistor in common emitter configuration. Using the circuit, explain how input, output characteristics are obtained
Solution
Input characteristics: The variation between the base current and the base-emitter voltage is obtained. Input characteristics is used to find input dynamic resistance of the transistor as it is represented by the slope.
Output characteristics: A graph representing the variation of the collector current and emitter voltage is obtained, keeping base current fixed. The slope fo the output characteristic graph gives us the output dynamic resistance.
APPEARS IN
RELATED QUESTIONS
Write the functions of three segments of a transistor.
For a CE-transistor amplifier, the audio signal voltage across the collector resistance of 2 kΩ is 2 V. Suppose the current amplification factor of the transistor is 100, find the input signal voltage and base current if the base resistance is 1 kΩ.
Draw a circuit diagram of a p-n-p transistor and explain how it works as a transistor amplifier
Draw a circuit diagram of a transistor amplifier in CE configuration.
Define the terms : Input resistance How are these determined using typical input and output characteristics?
With the help of necessary circuit diagram, describe briefly how n-p-n transistor in CE configuration amplifies a small sinusoidal input voltage. Write the expression for the ac current gain
Under what condition does the transistor act as an amplifier?
Derive an expression for voltage gain of the amplifier and hence show that the output voltage is in opposite phase with the input voltage.
Draw a labelled diagram of a common emitter amplifier, showing waveforms of the signal voltage and output voltage.
Gautam went for a vacation to the village where his grandmother lived. His grandmother took him to watch 'nautanki' one evening. They noticed a blackbox connected to the mike lying nearby. Gautam's grandmother did not know what that box was. When she asked this question to Gautam, he explained to her that it was an amplifier.
(i) Which values were displayed by the grandmother? How can inculcation of these values in students be promoted?
(ii) What is the function of an amplifier?
(iii) Which basic electronic device is used in the amplifier?
Figure shows a block diagram of a transmitter identify the boxes ‘X’ and ‘Y’ and write their functions.
Figure shows a block diagram of a detector for amplitude modulated signal. Identify the boxes ‘X’ and ‘Y’ and write their functions.
Consider an amplifier circuit using a transistor. The output power is several times greater than the input power. Where does the extra power come from?
Write the truth table of the following circuit. Name the gate represented by this circuit.
In a CE transistor amplifier, the audio signal voltage across the collector resistance of2 kΩ is 2 V If the base resistance is 1 kΩ and the current amplification of the transistor is 100, the input signal voltage is
In a common base amplifier, the phase difference between the input signal voltage and output voltage is ______.
In common emitter amplifier, the current gain is 62. The collector resistance and input resistance are 5 kΩ and 500 Ω respectively. If the input voltage is 0.01 V, the output voltage is:
When a junction transistor is used as an amplifier in CE-mode,
