Digital II UNIT 3,4,5 Quiz

A DAC is a

• digital-to-analog computer

• digital analysis calculator

• data accumulation converter

• digital-to-analog converter

A type of Error associated with digital to analog converters (DACs) is:

• nonmonotonic error

• incorrect output codes

• offset error

• nonmonotic and offset error

In troubleshooting a DAC, we check its performance characteristics, such as______________

• nonmonotonicity

• differential nonlinearity

• low and high gain

• all of the above

What is gain error in a DAC

• missing codes

• error in the slope of the output staircase waveform

• more or less input voltage is required for the first step than what is specified

• None

A Binary weighted digital to analog converter has an input resistor of 100kΩ. What will be current through the resistor, if the resistor is connected to a 5V Source?

• 50μA

• 5mA

• 500μA

• 50mA

In a binary weighted DAC, the lowest-value resistor corresponds to

• the highest binary weighted input

• the lowest binary weighted input

• the first input

• the last input

As Compared to binary weighted digital to analog DAC converter , the major advantage of the R/2R ladder digital to analog (DAC) is

• It only uses two different resistor values

• it has a fewer part of the same number of inputs

• Its Operation is much easier to analyse

• The Virtual Ground is elimated and the circuit is therefore easier to understand and troubleshoot

Which term applies to the maintaining of a given signal level until the next sampling

• Holding

• Aliasing

• shannon frequency sampling

• stair-stepping

In analog to digital converter (ADCs) sample - and - hold circuits are designed to

• Sample and hold the output of the binary counter during the conversion process

• stabilize the comparator threshold voltage during the comparison process

• stabilize the input analog signal during the conversion process

• sample and hold the D/A converter staircase waveform during the conversion process

What is the Purpose of Sample and Hold Circuit?

• To keep temporary memory

• Tp hold a voltage constant so an ADC has time to produce an output

• To hold a voltage constant so a DAC has time to produce an output

• To hold data after multiplexer has selected an output