Analog Signal to Digital Signal Conversion Methods Sampling: Sampling is the process of taking amplitude values of the continuous analog signal at discrete time intervals sampling period Ts. Quantization: Quantization involves assigning a numerical value to each sampled amplitude value from a range of possible values covering the entire amplitude range based on the number of bits.
Electronics Basics What is a Transistor? What is a Diode? What are SiC Power Devices? What are SiC Semiconductors? What is IGBT? What are LEDs? What is a Photointerrupter? What is a laser diode? What is a Resistor? Advantages include superior linearity and, in principle, guaranteed monotonicity.
In the 2nd stage right the voltage is further divided to obtain higher resolution. For example, regarding speed, there will be a delay due to the 2 amps. And with respect to output voltage accuracy, there may be offset caused by the 2nd stage amps. Binary Method A circuit that receives and processes unconverted digital signals is referred to as a binary system. Binary Method Using Resistors Binary systems provide weighted data to the circuit configuration, as shown below in the representative example of an R-2R ladder circuit.
The ability to obtain high resolutions provides a distinct advantage. Thermometer Code Method At the moment data is switched there may be a very different output voltage, possibly causing noise to be generated at the output analog signal.
Natural glitches do not occur. Thermometer code control prevents glitches from occurring at Vout. Previous Next. Electronics Basics What is a Transistor?
What is a Diode? What are SiC Power Devices? What are SiC Semiconductors? What is IGBT? What are LEDs? What is a Photointerrupter? A converter that is used to change the analog signal to digital is known as an analog to digital converter or ADC converter.
This converter is one kind of integrated circuit or IC that converts the signal directly from continuous form to discrete form. The analog to digital converter symbol is shown below. The process of converting an analog signal to digital can be done in several ways. So, a simple ADC can be designed with the help of discrete components.
One of the major benefits of ADC converter is the high data acquisition rate even at multiplexed inputs. Dynamic characteristics of the high-performance ADCs are improved measurement repeatability, low power consumption, precise throughput, high linearity, excellent Signal-to-Noise Ratio SNR , and so on.
A variety of applications of the ADCs are measurement and control systems, industrial instrumentation, communication systems, and all other sensory-based systems. Classification of ADCs based on factors like performance, bit rates, power, cost, etc.
The block diagram of ADC is shown below which includes sample, hold, quantize, and encoder. The process of ADC can be done like the following. First, the analog signal is applied to the first block namely a sample wherever it can be sampled at an exact sampling frequency. The amplitude value of the sample like an analog value can be maintained as well as held within the second block like Hold.
The hold sample can be quantized into discrete value through the third block like quantize. Finally, the last block like encoder changes the discrete amplitude into a binary number. In ADC, the conversion of the signal from analog to digital can be explained through the above block diagram. In the sample block, the analog signal can be sampled at an exact interval of time. The samples are used in continuous amplitude and hold real value however they are discrete with respect to time.
While converting the signal, the sampling frequency plays an essential role. So it can be maintained at a precise rate. Based on the system requirement, the sampling rate can be fixed. In ADC, this is the third block which is mainly used for quantization. The main function of this is to convert the amplitude from continuous analog into discrete. The value of continuous amplitude within hold block moves throughout quantize block to turn into discrete in amplitude.
Now, the signal will be in digital form because it includes discrete amplitude as well as time. The final block in ADC is an encoder that converts the signal from digital form to binary.
We know that a digital device works by using binary signals. So it is required to change the signal from digital to binary with the help of an encoder. So this is the entire method to change an analog signal to digital using an ADC.
The time taken for the entire conversion can be done within a microsecond. There are many methods to convert analog signals to digital signals. These converters find more applications as an intermediate device to convert the signals from analog to digital form, display output on LCD through a microcontroller. Now we are going to see an ADC of It is an 8-bit converter with a 5V power supply. It can take only one analog signal as input.
The digital output varies from
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