What is the purpose of dual slope integration?
A
Generate AC voltage B
Convert analog signal to digital C
Amplify voltage D
Store electric charge
Analysis & Theory
Dual slope integration is used in ADCs to convert analog to digital values.
What happens during the integration phase?
A
A reference voltage is applied B
Input voltage is integrated C
Input is ignored D
Digital signal is stored
Analysis & Theory
The input voltage is integrated over a fixed time.
What occurs during the de-integration phase?
A
No voltage is applied B
Same input is reintegrated C
Reference voltage ramps down D
Output is multiplied
Analysis & Theory
A known reference voltage of opposite polarity is applied to bring the integrator back to zero.
What determines the output of a dual slope ADC?
A
Peak voltage B
Time to reach full scale C
De-integration time D
Zero-crossing frequency
Analysis & Theory
The time taken to return to zero is proportional to the input voltage.
Which instrument commonly uses dual slope integration?
A
Oscilloscope B
Signal generator C
Digital voltmeter D
Rectifier
Analysis & Theory
Digital voltmeters use this method for accurate ADC conversion.
Why is dual slope integration noise-resistant?
A
It uses high-frequency sampling B
It cancels out noise during reference phase C
It ignores external signals D
It amplifies noise
Analysis & Theory
The integration averages out noise, especially 50/60 Hz interference.
What is the main drawback of dual slope ADCs?
A
High cost B
Low accuracy C
Slow speed D
Complex output
Analysis & Theory
They are slower than other ADC types like flash or SAR.
What is the role of the integrator in this method?
A
Amplifies signals B
Stores values C
Generates random signals D
Builds ramp voltage
Analysis & Theory
Integrator builds up a ramp voltage during both phases.
Which voltage is used during the second phase?
A
Input voltage B
Ramp voltage C
Reference voltage D
Filtered noise
Analysis & Theory
A fixed reference voltage is used for de-integration.
Dual slope ADCs are ideal for:
A
Fast signal processing B
Noisy environments C
Digital audio D
RF circuits
Analysis & Theory
They are accurate and resistant to noise, ideal for steady measurements.