Marks 1
1
The effect of current shunt feedback in an amplifier is to
GATE ECE 2005
2
Crossover distortion behavior is characteristic of
GATE ECE 1999
3
A power Amplifier delivers 50 W output at 50% efficiency. The ambient temperature is 25$$^\circ $$ C. if the maximum allowable junction temperature is 150 $$^\circ $$ C, then the maximum thermal resistance $${\theta _{Jc}}$$ that can be tolerated is
GATE ECE 1995
4
The circuit shown, the figure supplies power to on 8 v speaker or L.S. The vaLUES OF $${I_C}$$ and $${V_{CE}}$$ for this ciruit will be
GATE ECE 1995
5
A class-A transformer coupled, transistor power Amplifier is required to deliver a power rating of the transistor should not be less than.
GATE ECE 1994
6
In a transistor push-pull Amplifier
GATE ECE 1993
Marks 2
1
A regulated power supply, shown in figure below, has an unregulated input (UR) of 15 volts and generates a regulated output V $$_{out.}$$ .Use the component values shown in the figure.
The power dissipation across the transistor Q1 shown in the figure is
The power dissipation across the transistor Q1 shown in the figure isGATE ECE 2006
2
A regulated power supply, shown in figure below, has an unregulated input (UR) of 15 volts and generates a regulated output V
o
u
t
.
out. .Use the component values shown in the figure.
If the unregulated voltage increases by 20% the power dissipation across the transistor Q$$_1$$
If the unregulated voltage increases by 20% the power dissipation across the transistor Q$$_1$$ GATE ECE 2006
3
In case of class A amplifiers, the ratio (efficiency of transformer coupled amplifier)/(efficiency of a transformer less amplifier ) is
GATE ECE 1987