BJT Internal Capacitances and High Frequency Model - BITS Pilani
BJT Internal Capacitances and High Frequency Model - BITS Pilani
BJT Internal Capacitances and High Frequency Model - BITS Pilani
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Cut off frequency<br />
۞Value of Cπ is not given in the data sheet rather behavior<br />
of β (or hfe) versus frequency is normally given.<br />
۞To find Cπ <strong>and</strong> Cµ , derive an expression for hfe. i.e short<br />
circuit current gain as a function of frequency interms of<br />
hybrid π components.<br />
Consider following model<br />
<strong>BITS</strong> <strong>Pilani</strong>, Dubai Campus