Category: Lectures on physics
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RC coupled amplifier at high frequency, Lecture XXIV and XXV.
In our last lecture we discussed the case of a single stage RC coupled amplifier, a common emitter transistor circuit. for its response at low frequencies, i.e. frequencies that are less than 50 Hz. Today we will discuss what changes are going to be effected in the same circuit when we pass signal at high…
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RC coupled amplifier and its low frequency response, Lecture-XXIII.
In our last two lectures we discussed in much detail the case of the single stage common emitter RC coupled amplifier. There we discussed the elements of the circuits (such as why a given capacitor is required and so on), determined the currents in various components (such as base and collector) and eventually calculated the…
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Transistor biasing, Lecture-XIX and XX.
Transistors operate as amplifiers when external DC supply voltages are used and a desired current IC is produced. The control voltage or current are known as “BIAS”. Usually we need two biasing DC sources, one in the input circuit and one in the output circuit. But this is inconvenient and costly. We can instead use…
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Load line analysis of transistor, Lecture-XVIII.
In the last few lectures we discussed in some detail the construction and working of the bipolar junction transistors, their characteristics and various configurations. Briefly we touched upon the subject of various regions of operation of the BJT. Today we will extend our discussion into whats a load line for a transistor and in doing…
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Regions of operations in BJT, leakage current, Lecture-XVII.
In our last two lectures (find’em here) we discussed in all detail the bipolar transistors and some of their characteristics in various configurations. There we briefly mentioned the BJT operate in various regions such as the active, cut-off and the saturation region. Today we will discuss that aspect a little more into our wit.
M Dash Foundation: C Cube Learning 