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**Unformatted text preview: **For Icm I I v v v = = 2 1 , the current thru 2R 1 is 0 and therefore the voltage passes thru those amplifiers with no amplification which is an advantage for the CMMR. EFFECT OF FINIE OPEN-LOOP GAIN AND BANDWIDTH ON CIRCUIT FERFORMANCE Frequency Dependence of the Open-Loop Gain Expressing Gain in Decibels. A decibels in gain Voltage log 20 = b s A s A ϖ / 1 ) ( + = b j A j A / 1 ) ( + = At high frequencies, j j A j A j A t b b = = ≈ / ) ( Nominal Gain + 10 V/V Nominal Gain -10 V/V ft = 1mHz. Find the 3-dB frequency of the closed loop amplifiers....

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