Question

Design a single stage BJT amplifier with the following constraints:

This involves the following:

-DC and AC analysis and the frequency response of the amplifier.

-Use a 2N2222 transistor

-Power supply (VCC): 6 V

-An input impedance near to 3 kΩ

-Overall midband voltage gain of -30 V/V

-A load resistance of 2 kΩ

-The input signal has an RSignal of 500 Ω

-Choose a good Qpoint and select the coupling and bypass capacitors to obtain an fL-3dB of 100 Hz.

-The capacitors and resistors should have commercial values

-Part of the design requirement is that the amplifier will exhibit maximum symetrica1 swing in the voltage collector.

The Total Harmonic Distortion of the output voltage should be less than 5% when a sine wave with an amplitude of 5 mV is applied by the signal.

Determine the analytical fH-3dB of the final design of the amplifier. When the final design is completed, obtain the frequency response of the amplifier to verify the midband voltage gain, fL-3dB and fH-3dB.

Answer 1

Solution:

Given data:

Here we have to design a circuit digram using above given data:

The voltage gain for the above network is

Consider

Consider,

To acheive

cut-off frequency

Let this is decided by then,

To acheive

The other capacitors are choosen such that their effect on cut-off frequency is negligible.

which results