A transistor has a voltage gain 'A'. If the amount ' $\beta A^{\prime}$ of its output is appl put of the…
A transistor has a voltage gain 'A'. If the amount ' $\beta A^{\prime}$ of its output is appl put of the transistor, then the transistor becomes oscillator where
$\beta=0$
$\beta \mathrm{A}=1$
$\beta A=\infty$
$\beta A=0$
Solution
The voltage gain of oscillator circuit is given by $A_{f}=\frac{A}{1-A \beta}$
where, $\mathrm{A}$ is the voltage gain without feedback and $\mathrm{p}$ is called feedback factor.
For sustained oscillation, from Barkhausen criterion
$A \beta=1$
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