For the oscillator circuit shown in the given figure, expression

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For the oscillator circuit shown in the given figure, expression for the time period of oscillation can be given by (where t = RC)

1. τ ln 3
2. 2 τ ln 3
3. τ ln 2
4. 2 τ ln 2

Correct Option: B

T = 2RC ln	1 + β
	1 - β

Here , β =	1	=	R
	2		R + R

∴ T = 2 RC ln 3 = 2 τ ln 3