Home >> Category >> Electrical Engineering (MCQ) questions and answers >> Electrical Measurements & Units; Q. Successive-approximation-register (SAR) analog-to-digital converters (ADCs) are frequently the architecture of choice for medium-to-high-resolution applications with sample rates under 5 megasamples per second (Msps). Explain the successive approximation type A/D converter. The circuit diagram is shown below. Types of ADCs. Ramp Type Digital Voltmeter; Integrating Digital Voltmeter; Continuous Balance Digital Voltmeter; Successive approximation Digital Voltmeter; Applications of Digital Voltmeter. c. Toggling. Figure 9. It accepts input signals in the range of 0 to +5 V. If a wider analog input range is required, op amps can be used. The SAR output is 00000000. ADCs come in various speeds, use different interfaces, and provide differing degrees of accuracy. In the successive approximation ADC, the output of a comparator is connected to the input of a special counter register called a Successive Approximation Register (SAR). Counter type ADC; Successive Approximation ADC; Flash type ADC; This section discusses about these Direct type ADCs in detail. Figure-3 depicts block diagram of SAR type ADC. Two phase servomotor . This method compares the sampled analog input with the converter's output in succession, starting with the MSB. Thus, in that sense, it is actually digital. Related Content. And continuous balance type digital voltmeter As all the digital voltmeters can be operated upon dc power and not upon ac one. Integrating Type Digital Voltmeter(DVM): As we have already discussed what is working of digital voltmeter and its types, now we will discuss the second type DVM i.e, integrating type digital voltmeter.This digital voltmeter measures the true average value of the input voltage over a fixed measuring period. 26. The Successive Approximation Register (SAR) outputs a 50% signal on its digital output. This ADC is ideal for applications requiring a resolution between 8-16 bits. Successive approximation dvm block diagram. The V out is 0. The analog input signal is sampled (S&H) A successive approximation register (SAR), which is designed to supply an approximate digital code to the internal DAC, is initialized so that the most significant bit (MSB) is set to '1'. Previous question Next question Transcribed Image Text from this Question. This is generating a waveform which is representing a ramp. You can see there is a ramp generator. 3. As you can see, the digital output obtained from the ADC is B2h when the analog input is 3.5V. Counter type ADC . The dual slope, … ANSWER: Logic zero. The block diagram of a counter type ADC is shown in the following figure − The counter type ADC mainly consists of The basic successive-approximation architecture is shown in Figure 2. it can be used for measuring current , voltage and resistance . Outputs of successive approximation type register. SAR type ADC is mostly used in digital circuit to provide interface with the microprocessor. Successive Approximation Type Analog to Digital Converter. State the significance of using high speed sample and hold circuits. A successive approximation A/D converter consists of a comparator, a successive approximation register (SAR), output latches, and a D/A converter. The servomotor replaced by electromagnetic logic. Logic zero. Comparing Types of ADCs. ANSWER: B. The OP-Amp comparator is used to compare the unknown input voltage to … This adc unit basically distinguishes. Therefore it is called ramp type digital voltmeter(DVM). Its basic block diagram is shown in fig. 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