Interfacing to the Analog World Questions

• A CD player probably uses a sigma/delta D/A converter.
• One way to determine the resolution of a DAC is to calculate the ratio of one step voltage to the maximum output voltage.
• A light bulb and a switch are examples of an analog circuit.
• A summing op-amp can be used for DAC.
• Voltage-to-frequency ADC is more complicated than other ADCs.
• One form of a sigma/delta modulator circuit is designed to convert a continuous analog signal into a modulated bit stream (A/D).
• Flash A/D converters depend on an input clock pulse to perform each conversion.
• The time required to complete a conversion cycle is called conversion time.
• An operational amplifier is used as a comparator.
• In a counter-ramp A/D converter, the end-of-conversion line must be tied back to the clear input of the counter to change the circuit to perform continuous conversions.
• When analog inputs from several sources are to be converted, a multiplexing technique can be used so that one ADC may be time-shared.
• A D/A converter changes things such as temperature variations into digital quantities.
• In a binary-weighted D/A converter the sum of all the currents from the binary weighted resistors flows through the operational amplifier.
• The main advantage of the SAR ADC method is its high speed.
• Resolution in the analog output of a DAC is primarily dependent on the number of input binary bits.
• The delay between a change on the digital input of a DAC and the appearance of the change on the output is called settling time.
• The DSO ________, ________, and ________ analog waveforms.
• The AD7524, a CMOS IC available from several IC manufacturers, is an eight-bit D/A converter that uses a(n) ________.
• A digital voltmeter converts an analog voltage to its ________ representation.
• The figure given below represents a ________.