What is dual slope ADC?

What is dual slope ADC?

In dual slope type ADC, the integrator generates two different ramps, one with the known analog input voltage VA and another with a known reference voltage –Vref. Hence it is called a s dual slope A to D converter.

How does a dual slope integrating ADC work?

Dual-Slope ADC Architecture A dual-slope ADC (DS-ADC) integrates an unknown input voltage (VIN) for a fixed amount of time (TINT), then “de-integrates” (TDEINT) using a known reference voltage (VREF) for a variable amount of time (see Figure 2).

What is dual slope technique?

In the dual-slope technique, an integrator is used to integrate an accurate voltage reference for a fixed period of time. The same integrator is then used to integrate with the reverse slope, the input voltage, and the time required to return to the starting voltage is measured.

Where is dual slope ADC used?

In applications where this is not a problem, such as in measuring temperature transducers, a dual-slope ADC is a good choice. They are commonly used in digital voltmeters (DVMs) where their resolution is measured in display digits (4-1/2 digits = ±19999 counts or approximately 15 bits).

What is the disadvantage of dual slope Mcq?

Explanation: The main disadvantage of dual slope ADC is the long conversion time. For instance, if 2n-T=1/50 is used to reject line pick-up, the conversion time will be 20ms.

What are the advantages of dual slope ADC?

The advantage of using a dual slope ADC in a digital voltmeter is…

• its accuracy is high.
• its conversion time is small.
• it gives output in BCD format.
• it does not require a comparator.

Why is dual slope method?

Why is dual slope method preferred over ramp techniques? Explanation: During the process of integration, noise is canceled out by the positive and negative ramps in the dual slope method. The input signal is integrated only for a fixed interval of time and this is the basis for the dual slope method.

What are the major applications of dual slope type ADC?

The dual slope ADC is used in the applications, where accuracy is more important while converting analog input into its equivalent digital (binary) data.

Which type of ADC is faster Mcq?

Explanation: Flash type ADC has the advantage of high speed as the conversion takes place simultaneously rather than sequentially.

What is dual slope method preferred over ramp techniques?

1. Why is dual slope method preferred over ramp techniques? Explanation: The input signal is integrated only for a fixed interval of time and this is the basis for the dual slope method. Reference voltage is integrated with a negative slope.

What do you call a dual slope ADC?

Dual Slope type ADC. In dual slope type ADC, the integrator generates two different ramps, one with the known analog input voltage VA and another with a known reference voltage –Vref. Hence it is called a s dual slope A to D converter.

How does a dual slope analog to digital converter work?

The integrator of a dual-slope analog to digital converter has a switch at its input side which can either connect to a reference voltage or an input voltage. Initially in the conversion, the switch is connected to the input voltage and the integrator integrates the input voltage until its output equals the applied voltage.

Which is the output of a dual slope integrator?

The schematic diagram of a dual slope integrator is shown in Figure 7.11 (a) and the process is illustrated by the plot of the voltage at the output of the integrator in Figure 7.11 (b). The converter is initialized by setting the output of the integrator, the voltage across the capacitor, to zero.

Can a Triple slope converter be used for dual slope?

The counter is likewise divided into two sections, one for the MSBs and one for the LSBs. In a properly designed triple-slope converter, a significant increase in speed can be achieved while retaining the inherent linearity, differential linearity, and stability characteristics associated with dual-slope ADCs.