A BJT biasing circuit is shown in the figure, where  and . The Quiescent Point values of  and  are respectively

The Zener diode in circuit has a breakdown voltage of . The current gain  of the transistor in the active region in 99. Ignore base-emitter voltage drop . The current through the 20Ω resistance in milliamperes is _________ (Round off to 2 decimal places).

In the BJT circuit shown, beta of the PNP transistor is 100. Assume . .

The voltage across  will be 5 V when  is ……… kΩ. (Round off 2 decimal places)

In the circuit shown in the figure, the bipolar junction transistor (BJT) has a current gain. The base-emitter voltage drop is a constant. The value of the Thevenin equivalent resistance  (in ) as shown in the figure is ________(up to 2 decimal places).

The circuit shown in the figure uses matched transistors with a thermal voltage . The base currents of the transistors are negligible. The value of the resistance R in  that is required to provide 1 bias current for the differential amplifier block shown is __________ . (Give the answer up to one decimal place.)

For the circuit shown in the figure below, it is given that . The transistor has and when the B-E junction is forward biased.

For this circuit, the value of  is

A transistor circuit is given below. The Zener diode breakdown voltage is 5.3V as shown. Take base to emitter voltage drop to be 0.6V. The value of the current gain  is __________.

In the given circuit, the silicon transistor has  and a collector voltage . Then the ratio of  and  is ____________.         

In the following circuit, the transistor is in active mode and . To get , we replace  with . Then the ratio  is _______________.

When a bipolar junction transistor is operating in the saturation mode, which one of the following statements is TRUE about the state of its collector – base (CB) and the base – emitter (BE) junctions?

The magnitude of the mid – band voltage gain of the circuit shown in figure is (assuming  of the transistor to be 100)

The transistor in the given circuit should always be in active region. Take , . The maximum value of RC in  which can be used, is __________.

The voltage gain  of the circuit shown below is

The transistor used in the circuit shown below has a of 30 and  is negligible.

If the forward voltage drop of diode is 0.7V, then the current through collector will be

The transistor circuit shown uses a silicon transistor with  and a dc current gain of 100. The value of  is

Transformer and emitter follower can both be used for impedance matching at the output of an audio amplifier. The basic relationship between the input power  and output power  in both the cases is

Two perfectly matched silicon transistors are connected as shown in the figure. Assuming the β of the transistors to be very high and the forward voltage drop in diodes to be 0.7V, the value of current I is

The common emitter forward current gain of the transistor shown is .

The transistor is operating in

The three-terminal linear voltage regulator is connected to a  load resistor as shown in the figure. If  is 10 V, what is the power dissipated in the transistor?

The input signal  shown in the figure is a 1 kHz square wave voltage that alternates between +7V and −7V with a 50% duty cycle. Both transistors have the same current gain, which is large. The circuit delivers power to the load resistor . What is the efficiency of this circuit for the given input?  Choose the closest answer.

Consider the circuit shown in figure.  If the β of the transistor is 39 and  is 20nA and the input voltage is +5V, then transistor would be operating in

The common emitter amplifier shown in Figure is biased using a 1mA ideal current source. The approximate base current value is:        

Two perfectly matched silicon transistors are connected as shown in figure. The value of the current I is

The feedback used in the circuit shown in figure can be classified as

A bipolar junction transistor (BJT) is used as a power control switch by biasing it in the cut-off region (OFF state) or in the saturation region (ON state). In the ON state, for the BJT

The trans-conductance  of the transistor shown in figure is 10mS. The value of the input resistance  is         

In the Schmitt trigger circuit shown in figure, if , the output logic low level  is        

In the circuit of Figure, assume that the transistor has . The value of collector current  of the transistor is approximately

In the circuit shown in Figure, the current gain (β) of the ideal transistor is 10. The operating point of the transistor  is

For the circuit shown in Figure, and . Determine

In the single-stage transistor amplifier circuit shown in Fig., the capacitor  is removed.  Then the ac small-signal mid-band voltage gain of the amplifier.

The transistor in the amplifier circuit shown in figure is biased at . Use

In the circuit of fig, the value of the base current  will be

For the small signal BJT amplifier shown in fig, Assume β = 100 and Frequency =1 kHz

One of the applications of current mirror is:

A NPN, silicon transistor is meant for low-current audio amplification. Match its following characteristics against their values:

Characteristics                      Values

(a)                       (P) 0.7V

(b)                       (Q) 0.2V

(c)                       (R) 6V

                     (S) 50V

In the transistor amplifier shown in figure, the ratio of small signal voltage gain, when the emitter resistor , is bypassed by the capacitor  to when it is not bypassed, (assuming simplified approximate h-parameter model for transistor), is

In the transistor circuit shown in figure, collector-to-ground voltage is +20V. Which of the following is the probable cause of error?

In a Common Emitter amplifier, the un-bypassed emitter resistance provides

In an RC-coupled Common Emitter amplifier, which of the following is true?

Figure below shows a common emitter amplifier. The quiescent collector voltage of the circuit is approximately

Figure shows a common emitter amplifier

(a) Simplify the circuit by applying Thevenin’s theorem to the biasing network  at the base of the transistor

(b) Assuming  to be a short for the frequency range considered. Draw the small signal a.c. model of the circuit obtained in (a) by using the simple model for the transistor shown in figure.

(c) Evaluate the small signal gain of the amplifier.