9.61 The differential amplifier circuit of Fig. P9.61 utilizes a resistor connected to the negative power supply to establish the bias current I. (a) For vB1 = vid/2 and vB2 =−vid/2, where vid is a small signal with zero average, find the magnitude of the differential gain,  vo/vid . (b) For vB1 = vB2 = vicm, where vicm has a zero average, find the magnitude of the common-mode gain,  vo/vicm . (c) Calculate the CMRR. (d) If vB1 =0.1 sin 2π × 60t + 0.005 sin 2π × 1000t, volts, and v B2 =0.1 sin 2π ×60t −0.005 sin 2π ×1000t, volts, find v o.

9.61 Copy - 9.61 The differential amplifier circuit of Fig. P9.61 utilizes a resistor connected to the negative power supply to establish the bias current I. (a) For vB1 = vid/2 and vB2 =−vid/2, where vid is a small signal with zero average, find the magnitude of the differential gain,  vo/vid . (b) For vB1 = vB2 = vicm, where vicm has a zero average, find the magnitude of the common-mode gain,  vo/vicm . (c) Calculate the CMRR. (d) If vB1 =0.1 sin 2π × 60t + 0.005 sin 2π × 1000t, volts, and v B2 =0.1 sin 2π ×60t −0.005 sin 2π ×1000t, volts, find v o.9.61b - 9.61 The differential amplifier circuit of Fig. P9.61 utilizes a resistor connected to the negative power supply to establish the bias current I. (a) For vB1 = vid/2 and vB2 =−vid/2, where vid is a small signal with zero average, find the magnitude of the differential gain,  vo/vid . (b) For vB1 = vB2 = vicm, where vicm has a zero average, find the magnitude of the common-mode gain,  vo/vicm . (c) Calculate the CMRR. (d) If vB1 =0.1 sin 2π × 60t + 0.005 sin 2π × 1000t, volts, and v B2 =0.1 sin 2π ×60t −0.005 sin 2π ×1000t, volts, find v o.

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images - 9.61 The differential amplifier circuit of Fig. P9.61 utilizes a resistor connected to the negative power supply to establish the bias current I. (a) For vB1 = vid/2 and vB2 =−vid/2, where vid is a small signal with zero average, find the magnitude of the differential gain,  vo/vid . (b) For vB1 = vB2 = vicm, where vicm has a zero average, find the magnitude of the common-mode gain,  vo/vicm . (c) Calculate the CMRR. (d) If vB1 =0.1 sin 2π × 60t + 0.005 sin 2π × 1000t, volts, and v B2 =0.1 sin 2π ×60t −0.005 sin 2π ×1000t, volts, find v o.

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