Question

1. Design a symmetrical differential amplifier as shown in circuit # 3, i.e., calculate the values of resistances $R_{ref}$, $R_A$, $R_B$ and $R_C$. Assume that the current $I_O = 2$ mA, transistors are in active region, $V_{CC} = 15$ volts, $V_{EE} = -15V$, and $V_{CE1} = V_{CE2} = 6V$. Make necessary assumptions to simplify your calculations (Hints: Ignore small base currents and ground small signal input sources while doing DC calculations. Since differential amplifier is symmetrical, biasing current will be divided equally between the two legs of the amplifier. To calculate the resistance values for Wilson current source, assume a suitable value of reference current and then first solve for $R_{ref}$ and $R_A$

          1. Design a symmetrical differential amplifier as shown in circuit # 3, i.e., calculate the values of resistances $R_{ref}$, $R_A$, $R_B$ and $R_C$. Assume that the current $I_O = 2$ mA, transistors are in active region, $V_{CC} = 15$ volts, $V_{EE} = -15V$, and $V_{CE1} = V_{CE2} = 6V$. Make necessary assumptions to simplify your calculations (Hints: Ignore small base currents and ground small signal input sources while doing DC calculations. Since differential amplifier is symmetrical, biasing current will be divided equally between the two legs of the amplifier. To calculate the resistance values for Wilson current source, assume a suitable value of reference current and then first solve for $R_{ref}$ and $R_A$

1. Design a symmetrical differential amplifier as shown in circuit # 3, i.e., calculate the values of resistances Rref, RA, RB and RC. Assume that the current IO = 2 mA, transistors are in active region, VCC = 15 volts, VEE = -15V, and VCE1 = VCE2 = 6V. Make necessary assumptions to simplify your calculations (Hints: Ignore small base currents and ground small signal input sources while doing DC calculations. Since differential amplifier is symmetrical, biasing current will be divided equally between the two legs of the amplifier. To calculate the resistance values for Wilson current source, assume a suitable value of reference current and then first solve for Rref and RA

Added by Miguel -Ngel B.

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