The given figure shows wein bridge connection for frequency

The given figure shows wein bridge connection for frequency measurement. C and R are variables and ganged together. For balanced condition the expression for frequency is ƒ = 1/2πCR when

From the balance equation,

or	R₁(jωCR + 1)	=	R₂R
	jωC		(jωCR + 1)

or R₁ (– C²ω²R² + 1 + 2 jωCR) = jR₂CωR
or 2CωRR₁ = CωRR₂

∴ R₁ =	R₂
	2

and – C²ω²R² + 1 = 0,

or ω =	1
	RC

or ƒ =	1
	2πRC