61901. What is the resolution, in percent, of a 12-bit DAC?
61902. What circuitry is on an ADC0808 IC?
61903. What is the maximum conversion time for an 8-bit successive-approximation ADC with a clock frequency of 20 kHz?
61904. What is one advantage to using a parallel-encoded (flash) ADC?
61905. If the same analog signal is to be converted to an 8-bit resolution using a counter-ramp ADC, how many comparator circuits would be used?
61906. What is the major advantage of the R/2R ladder D/A converter as compared to a binary-weighted D/A converter?
61907. What is the main disadvantage of the stairstep-ramp A/D converter?
61908. What is the purpose of a sample-and-hold circuit?
61909. What is the linearity of a D/A converter?
61910. Referring to the given figure, what should the display on the scope look like if the A/D converter is working properly?
61911. What is the acquisition time of the AD1154 sample-and-hold IC?
61912. What type of DAC is shown below?
61913. What is the disadvantage to using a counter-ramp type ADC?
61914. Referring to the given figure, what appears to be wrong, if anything, with the output of the D/A converter?
61915. What is the maximum conversion time for a counter-ramp ADC with 8-bit resolution and a clock frequency of 20 kHz?
61916. A test system using the GPIB is being used to monitor a potentially dangerous crash test from a distance of 200 feet. The engineer decides to have you fabricate a special cable, rather than order one, since all the materials are on hand and the tests are already behind schedule. When the tests are run, the test system is erratic and the data is almost useless. What has gone wrong?
61917. A certain digital-to-analog converter has a step size of 0.25 V and a full-scale output of 7.75 V. Determine the percent of resolution and the number of input binary bits.
61918. A simultaneous A/D converter is also known as a(n) ________ A/D converter.
61919. The primary disadvantage of the simultaneous A/D converter is:
61920. What is the output voltage for the circuit shown below?
61921. Three characteristics of op amps make them almost ideal amplifiers: very high input impedance, very low impedance, and ________.
61922. Sample-and-hold circuits in A/D converters are designed to:
61923. What is the main disadvantage of the counter-ramp A/D converter?
61924. Why is a binary-weighted DAC usually limited to 4-bit binary conversion?
61925. The co-operative which serve the members other than by providing credit is called:
61926. What is gain error in a DAC?
61927. An actuator is usually a device that:
61928. The DAC0808 and the MC1408 are very popular and inexpensive 8-bit D/A converters.
61929. 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.
61930. The main advantage of the SAR ADC method is its high speed.
61931. One way to determine the resolution of a DAC is to calculate the ratio of one step voltage to the maximum output voltage.
61932. The output voltage or current of a digital-to-analog converter is truly an analog signal.
61933. The amount of deviation of the measured step size from the ideal step size is a measure of linearity.
61934. When analog inputs from several sources are to be converted, a multiplexing technique can be used so that one ADC may be time-shared.
61935. An AD7524 is an eight-bit D/A converter that uses an R/2R ladder network.
61936. Voltage-to-frequency ADC is more complicated than other ADCs.
61937. Two characteristics of ideal operational amplifiers are very high input impedance and very high voltage gain.
61938. Electrical quantities can be interpreted without conditioning by a digital computer.
61939. It is possible to develop more than 16 different analog levels using 4-bit resolution.
61940. A simultaneous, multiple comparator, or flash converter uses parallel encoding.
61941. A DAC is monotonic if its output increases as its binary input is incremented from one value to the next.
61942. An operational amplifier is used as a comparator.
61943. Resolution in the analog output of a DAC is primarily dependent on the number of input binary bits.
61944. The primary disadvantage of the flash A/D converter is the large number of comparators required.
61945. A summing op-amp can be used for DAC.
61946. A data acquisition system may communicate via two common buses: the data bus and the control bus.
61947. The time required to complete a conversion cycle is called conversion time.
61948. Generally speaking, DACs with a current output will have a shorter settling time than those with voltage outputs.
61949. A D/A converter changes things such as temperature variations into digital quantities.
61950. If the least significant bit (LSB) of a four-bit binary-weighted resistor D/A converter connects to a 200 resistor, then the resistor needed for the next bit is 100 .
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