Q3) The figure below shows the small single equivalent circuit of a single stage transistor amplifier. The transistor has the following small signal parameters: hie 3 ko, hfe = 90 = 22 ΚΩ 8 ΚΩ hie hfeib 4.7 ΚΩ Vo Vi e The input signal to the amplifier, vi, is a sinewave of 20 mV amplitude at a frequency of 1 kHz. Assuming that the reactance of C is small at 1 kHz, calculate i) the amplitude of the base current signal ib, ii) the amplitude of the collector current signal, iii) the amplitude of the output signal vo, iv) the input impedance of the amplifier. The amplifier is to amplify signals down to a frequency of 40 Hz. Determine an appropriate value for C.
Q3) The figure below shows the small single equivalent circuit of a single stage transistor amplifier. The transistor has the following small signal parameters: hie 3 ko, hfe = 90 = 22 ΚΩ 8 ΚΩ hie hfeib 4.7 ΚΩ Vo Vi e The input signal to the amplifier, vi, is a sinewave of 20 mV amplitude at a frequency of 1 kHz. Assuming that the reactance of C is small at 1 kHz, calculate i) the amplitude of the base current signal ib, ii) the amplitude of the collector current signal, iii) the amplitude of the output signal vo, iv) the input impedance of the amplifier. The amplifier is to amplify signals down to a frequency of 40 Hz. Determine an appropriate value for C.
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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Transcribed Image Text:Q3)
The figure below shows the small single equivalent circuit of a single stage transistor
amplifier. The transistor has the following small signal parameters:
hie 3 ko, hfe = 90
=
22 ΚΩ
8 ΚΩ hie
hfeib
4.7 ΚΩ
Vo
Vi
e
The input signal to the amplifier, vi, is a sinewave of 20 mV amplitude at a frequency of 1
kHz. Assuming that the reactance of C is small at 1 kHz, calculate
i)
the amplitude of the base current signal ib,
ii)
the amplitude of the collector current signal,
iii)
the amplitude of the output signal vo,
iv)
the input impedance of the amplifier.
The amplifier is to amplify signals down to a frequency of 40 Hz. Determine an
appropriate value for C.
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