2.30 The inverting circuit with the T network in the feedback is redrawn in Fig. P2.30 in a way that emphasizes the observation that R, and R, in effect are in parallel (because the ideal op amp forces a virtual ground at the inverting input terminal). Use this observation to derive an expression for the gain (v/v) by first finding (v/v,) and (v/v). For the latter use the voltage-divider rule applied to R, and (R₂ || R.). 110- www R₁ Figure P2.30 OV R₂ www R₁ www R₁ www -0%

Fig: 1