Question: a) Compare the active (with OPAMP) and passive (without OPAMP) DAC circuits. What is the advantage of active DAC circuit based on? Explain. b) With

a) Compare the active (with OPAMP) and passive (without OPAMP) DAC circuits. What is the advantage of active DAC circuit based on? Explain.

b) With a 4-bit DAC (1011) containing an active circuit element (OPAMP), 2 binary numbers are wanted to be converted to analog signals. This binary number of logic-0 bits are represented by Vin = 0 Volts and logic-1 by Vin = 4 Volts. Draw this DAC circuit. Write the equation of the Vout output voltage and calculate the value for the given binary number.

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