How does an integrating ADC work?
The basic integrating ADC circuit consists of an integrator, a switch to select between the voltage to be measured and the reference voltage, a timer that determines how long to integrate the unknown and measures how long the reference integration took, a comparator to detect zero crossing, and a controller.
What is 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.
What are the advantages of dual slope ADC over single slope ADC?
The dual-slope ADC has many advantages. Noise present on the input voltage is reduced by averaging. The value of the capacitor and conversion clock do not affect conversion accuracy, since they act equivalently on the up-slope and down-slope.
Which is the application of dual slope ADC converter?
The dual-slope ADC architecture was a breakthrough in ADCs for high-resolution applications such as digital voltmeters (DVMs). The dual-slope ADC has the following advantages: Noise present on the input voltage is reduced by averaging.
What is the conversion time for dual slope ADC?
Dual-slope converter. As an example, to obtain 10-bit resolution, you would integrate for 1024 (210) clock cycles, then deintegrate for up to 1024 clock cycles (giving a maximum conversion of 2 × 210 cycles). For more resolution, increase the number of clock cycles.
What is the significance of the name dual slope method?
What is the significance of the name dual slope method? 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. Hence the method is known as dual slope integrating type DVM.
Why it is called 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.
What are the performance characteristics of DAC?
Some Performance Characteristics of DACs This includes resolution, speed, dynamic range, SFDR, ENOB, and SNR. A performance characteristic unique to DACs is the undesirable image signals appearing within each Nyquist zone of the output. Other important characteristics include settling time and glitch-impulse area.
Why dual slope ADC is used in digital voltmeter?
Detailed Solution. Dual slope ADC has high accuracy, so it is used in digital voltmeter. Dual slope ADC requires long conversion time compared to remaining converters.
What are the advantages of DAC?
The main benefit of a good external DAC is sound quality. The audio quality of a digital to analog conversion is highly dependent upon bit rate, sampling frequency, digital filters, and other electronic processes. A specialized DAC is designed for the best audio performance.
What are the advantages of dual slope over ramp type?
Following are the main advantages of dual-slope integrating type DVM. Excellent noise rejection as noise and superimposed ac are averaged out during the process of integration. The RC time constant does not affect the input voltage measurement. A sample and hold circuit is not necessary.
Why a dual slope oscilloscope is needed?
1. Why a dual slope oscilloscope is needed? Explanation: A dual trace oscilloscope is required for comparison for two or more voltages in the analysis and study of electronic circuits and systems.
What are the main advantages of integrating type 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.
What is dual slope ADC?
As the name suggests, a dual slope ADC produces an equivalent digital output for a corresponding analog input by using two (dual) slope technique. The block diagram of a dual slope ADC is shown in the following figure −
Which application uses dual slope?
In which application dual slop converter are used. Explanation: Dual slope converters are particularly suitable for accurate measurement of slow varying signals.
What is advantage of dual slope ADC used in DVM?
The advantage of using a dual-slope ADC in a digital voltmeter is that its accuracy is high. Dual slope ADC: 1. Dual slope integration type ADC is the most accurate type of ADC because of non-dependency on variation in component values caused by noise.
What is the principle of dual beam oscilloscope?
Dual beam oscilloscope can generate the two electron beams within the cathode ray tube either by using double electron gun tube or by splitting beam. In this method, the brightness and focus each beam are controlled separately. But two tubes increases the size and weight of the oscilloscope and it looks bulky.
How does a dual trace oscilloscope work?
Definition: In dual trace oscilloscope, a single electron beam generates 2 traces, that undergoes deflection by two independent sources. In order to produce two separate traces, basically, 2 methods are used, known as alternate and chopped mode. These are also known as the two operating modes of the switch.
How DAC works and its principles?
A DAC takes digital data and transforms it into an analog audio signal. Afterward, it sends that analog signal to an amplifier. When you hear digital recordings, you’re actually listening to an analog signal that was converted from digital by a DAC.