Determine resistance in ideal inverting summing amplifier, Electrical Engineering

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Q. In the ideal inverting summing amplifier circuit with two inputs, for Rf = 10 k, find R1 and R2 so that vo = -10vi1 -5vi2. What is the value of the lsb resistor, Q. For a 10-bit R-2R ladder-network ...

Q. For a 10-bit R-2R ladder-network D/A converter with an MSB resistor value of 10 k, what is the value of the LSB resistor?

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