What is dual slope integrating type DVM?
What is dual slope integrating type DVM?
The dual slope integrating type DVM integrates the input voltage Vi. The slope of the integrated signal is proportional to the input voltage under measurement. After certain period of time, say t1, the supply of input voltage Vi is stopped, and a negative voltage -Vr of the integrator is applied.
What is dual slope type ADC?
Comparison of major ADC Types
| ADC Type | Pros | Max Resolution |
|---|---|---|
| Successive Approximation (SAR) | Good speed/resolution ratio | 18 bits |
| Delta-sigma (ΔΣ) | High dynamic performance, inherent anti-aliasing protection | 32 bits |
| Dual Slope | Accurate, inexpensive | 20 bits |
| Pipelined | Very fast | 16 bits |
What is the other input to dual slope integrating type?
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.
What is integrating type DVM?
Integrating Type Digital Voltmeter(DVM): This voltmeter employs an integration technique whirls uses a voltage to frequency conversion. The voltage to frequency (V/F) converter functions as a feedback control system which governs the rate of pulse generation in proportion to the magnitude of input voltage.
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 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.
Which ADC has highest accuracy?
Dual slope integration type ADC
Dual slope integration type ADC has the highest accuracy.
Which type of ADC is faster?
flash ADC
The flash ADC is the fastest type available. A flash ADC uses comparators, one per voltage step, and a string of resistors. A 4-bit ADC will have 16 comparators, an 8-bit ADC will have 256 comparators.
What is the disadvantage of dual slope?
Its main disadvantage is a slow conversion rate, often in the range of 10 samples/second. In applications where this is not a problem, such as in measuring temperature transducers, a dual-slope ADC is a good choice.
Why is dual slope method preferred over ramp techniques?
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. 2.
Which a D converter is considered to be simplest fastest and most expensive?
4. Which A/D converter is considered to be simplest, fastest and most expensive? Explanation: The simplest possible A/D converter is flash type converter and is expensive for high degree of accuracy.
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.
How are integrators used in dual slope integration?
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. The order of integrations does not matter.
What is a dual slope a to D converter?
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. The logic diagram for the same is shown below. Operation:
Which is better dual slope or dual slop ADC?
Figure-5 depicts block diagram of Dual Slope Integrating type ADC. It is used in the design of digital voltmeter. For n bit dual slop type of ADC, Advantages: It is more accurate ADC type among all. It has greater noise immunity compare to other ADC types.
How is dual slope integration used in DVMs?
When the converter is to be interfaced to a microprocessor, and many high performance DVMs use microprocessors for data manipulation, the counters employed are binary. In the dual-slope technique, an integrator is used to integrate an accurate voltage reference for a fixed period of time.