Digital Signal Processing Questions & Answers

Digital Signal Processing Questions & Answers A 4-bit R/2R ladder digital-to-analog converter uses ________. A. one resistor value B. two resistor values C. three resistor values D. four resistor values - CORRECT ANSWER - B A binary-weighted-input digital-to-analog converter has a feedback resistor, Rf, of 12 k. If 50 uA of current is through the resistor, voltage out of the circuit is ________. A. 0.6 V B. -0.6 V C. 0.1 V D. -0.1 V - CORRECT ANSWER - B A binary-weighted-input digital-to-analog converter has an input resistor of 100 k. If the resistor is connected to a 5 V source, current through the resistor is ________. A. 50 mA B. 50 uA C. 5 mA D. 500 uA - CORRECT ANSWER - B A monotonicity error in a DAC will show up as an incorrect analog output ________. A. only for higher value inputs B. only for lower value inputs C. only for certain (scattered) inputs D. for all inputs - CORRECT ANSWER - C A standard logic device can be connected on a bus system as an open-collector logic device by connecting each output to a ________. A. discrete transistor B. 10 k series resistor C. light-emitting diode D. CMOS buffer - CORRECT ANSWER - A An ADC that compares each bit, one at a time, with the input analog signal is a ________.