Question

for an common emitter amplifier with load of 100 ohm , collector resistance of 18 ohms and emmiter resistance of 178,8 ohm , the gain is approximately

Answer #1

Which of the following dc coupled amplifiers will typically
exhibit the smaller bandwidth?
A high-gain common-emitter amplifier
A high-gain common-base amplifier
A common-collector amplifier with low output resistance
A Cascode amplifier

1) Since current normally flows out of the emitter of a PNP, the
emitter is usually drawn pointing down towards the negative power
supply.
Select one:
True
False
2)
For a MOS common-source amplifier, which of the following is
true ?
Select one:
a. The voltage gain is typically low
b. The input resistance is typically high
c. The voltage gain is positive
d. None of these
e. The output resistance is typically low
3)
The gain of a common-emitter...

Design and implement a common-emitter audio amplifier using a
general purpose transistor 2N3904. The design must provide features
such as; mid-band gain of 100 with undistorted output, stable bias
with voltage divider bias (from a 12 or 15V dc source), AC gain
stability with emitter bypass capacitor, and coupling capacitors at
the input and output to block the dc components.
Your design should include complete calculations for choosing
voltages, various circuit components (resistors, coupling
capacitors), and the circuit diagram. The...

Design and implement a common-emitter audio amplifier
using a general purpose transistor 2N3904. The design must provide
features such as; mid-band gain of 100 with undistorted output,
stable bias with voltage divider bias (from a 12 or 15V dc source),
AC gain stability with emitter bypass capacitor, and coupling
capacitors at the input and output to block the dc
components.
Your design should include complete calculations for choosing
voltages, various circuit components (resistors, coupling
capacitors), and the circuit diagram. The...

What happens when you increase the input voltage of a common
emitter BJT amplifier?

Consider the amplifier circuit of Fig. 5.39(a) without the load
resistance and with channel length modulation neglected. Let V, V,
and mA/V2 . Find , , and to obtain a voltage gain of 25 V/V and an
input resistance of 0.5 M . What is the maximum allowable input
signal, ?

A metal resistor has resistance of 10 ohm at 0°C and 11 ohms at
160°C, Find the temperature coefficient?

in a circuit of radio frequency, a resistance of 165 ohms serves
as load to the final of a transmission line of 75 ohms. We wish to
use a parallel open stub to achieve maximum power transfer. Use the
smith chart to get values. a) Determine the minimum distance in
wavelengths from the load that has to be connected to the stub. b)
Determine the minimum length of the stub in wave lengths.

Design a common emitter amplifier so that Ic = 1 ma +- 20% and
Vce = 4 V +- 25% using a 2N3947 over its whole temperature range.
Show your Calculations. Find Rin, Rout, and Av for mid-band
frequencies. Assume Xc's are negligible and use typical values for
Bo at 25 C, and let Vcc = 12 V.

A 100 + j200 ohm load is connected to a 75 ohm transmission line
that is 1 m long. If signal wavelength on the line is 8 m, find the
input impedance and the signal frequency. Assume that the phase
velocity is 70% of the speed of light in free space

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