Analogue signal

Any continuous signal for which the time varying feature of the signal is a representation of some other time varying quantity.

Analogue to Digital Converter (ADC)

An Analogue - to - Digital Converter (ADC) takes an analogue input voltage and after a certain amount of time produces a digital output code that represents an analogue input.

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Analogue Signals and Digital Signals

Any continuous signal for which the time varying feature of the signal is a representation of some other time varying quantity.

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Analogue to Digital Conversion (ADC)

An Analogue - to - Digital Converter (ADC) takes an analogue input voltage and after a certain amount of time produces a digital output code that represents an analogue input.

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Types of Analogue to Digital Converters

It is the highest-speed ADC available but requires much more circuitry than the other types. For example, a 6-bit flash ADC requires 63 analogue comparators, while an 8-bit unit requires 255 comparators and a 10-bit converter requires 1023 comparators. The large number of comparators has limited the size of flash converters. IC flash converters are commonly available in 2-to-8 bits.

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Digital to Analogue Conversion (DAC)

The process of converting digital signals into analogue signals.

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Quality Comparison: Digital vs. Analogue Broadcast

Digital broadcast generally offers better quality than analogue broadcast due to its ability to transmit higher resolution video and audio signals without degradation.

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Types of Analogue to Digital Converters

A type of analog to digital converter whose conversion time is dependent on clock frequency and is required to go through from 000 even if the signal is at a higher range, making it time-consuming.

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Resolution of DAC

In general, for an N-bit DAC, the number of different levels will be 2^N, and the number of steps will be 2^N - 1.

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Analogue to Digital Conversion (ADC)

The voltage being measured or converted by the ADC, in this case 5V.

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Resolution of DAC

The resolution of a DAC refers to the number of bits used to represent the analog output signal, and higher resolution leads to higher accuracy in the converted signal.

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Analogue Signals and Digital Signals

Represented by continuously change (smooth change) in level throughout some range.

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Digital Video Broadcast

Digital Video Broadcast (DVB) is a digital broadcasting technology that transmits audio and video signals to television sets using digital signals rather than analog signals.

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Conversion Time in ADC and DAC

The time taken for an analog signal to be converted into a digital signal or vice versa.

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Analogue to Digital Conversion (ADC)

A filter used to remove or reduce the aliasing effect in sampled signals.

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Analogue to Digital Conversion (ADC)

A type of analog-to-digital converter that converts an input voltage into a digital output using a bank of comparators and a priority encoder.

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Resolution of DAC

The number of digital bits used to represent the analog input voltage in a flash ADC, in this case, 3 bits are used to represent 7 levels corresponding to 1V, 2V, 3V, ... and 7V.

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Analogue to Digital Conversion (ADC)

A digital circuit that generates a binary code based on the highest priority active input line, used in flash ADC to produce the digital output based on the comparator outputs.

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Analogue to Digital Conversion (ADC)

A/D Conversion refers to the process of converting an analogue signal into a digital format, while D/A Conversion refers to the process of converting a digital signal into an analogue format.

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Analogue Signals and Digital Signals

A signal in which a continuous quantity is represented by a discrete function which can only take on one of a finite number of values.

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Types of Analogue to Digital Converters

A type of analogue to digital converter that uses a linear ramp to perform the conversion process.

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Analogue to Digital Conversion (ADC)

A circuit that converts digital signals into analog signals.

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Analogue Signals and Digital Signals

Continuous signals that represent physical quantities such as sound, light, and temperature.

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Analogue to Digital Conversion (ADC)

Representation of information using discrete values, often in the form of binary digits (0 and 1).

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Analogue to Digital Conversion (ADC)

The process of converting analogue signals to digital form, involving sampling and quantization.

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ADC and DAC Resolution

The ADC produces digital output with 4 bits, allowing for 2^4 or 16 possible digital values.

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Resolution of DAC

The change in the analog input voltage that will cause a change in the digital output of the ADC, in this case, the step size is 1V.

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Analogue Signals and Digital Signals

Sound is a pattern of pressure waves carried through the air, such as music and talking.

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Analogue Signals and Digital Signals

A device that senses how the air pressure varies and generates a pattern of voltage fluctuations.

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Analogue Signals and Digital Signals

Represented by discrete steps (jumps). Constant level if you choose a small enough time scale.

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Resolution of DAC

The resolution of DAC is defined as the smallest change that can occur in the analogue output as a result of a change in the digital input.

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Analogue Signals and Digital Signals

Discrete signals that represent information in the form of a sequence of symbols or numbers, and are less susceptible to noise and interference.

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Analogue to Digital Conversion (ADC)

The process of converting continuous analog signals into discrete digital representations using sampling and quantization.

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ADC and DAC Resolution

Resolution, accuracy, conversion time, and input bandwidth are crucial factors to consider in an ADC conversion.

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Digital to Analogue Conversion (DAC)

The digital inputs D, C, B, and A are from the output register of the digital system. These 4 bits produces 2^4=16 different numbers.

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Digital to Analogue Conversion (DAC)

The process of converting digital data back into an analogue signal, such as music or voice, for playback.

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Analogue Signals and Digital Signals

The maximum voltage level that a system is designed to handle, often used as a reference for analog-to-digital converters (ADCs) and digital-to-analog converters (DACs).

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Types of Analogue to Digital Converters

A type of analogue to digital converter that uses a bank of comparators to quickly determine the input voltage.

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Analogue Signals and Digital Signals

Continuous signals that vary in time and amplitude, representing physical quantities such as sound, light, and temperature.

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Digital to Analogue Conversion (DAC)

The output signal resulting from the conversion of digital input using a Digital-to-Analogue converter.

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Digital to Analogue Conversion (DAC)

A constant value for a given Digital-to-Analogue converter connected to a fixed reference voltage supply.

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Digital to Analogue Conversion (DAC)

Digital - to - Analogue (DAC) conversion is a process of taking a value represented in digital code (straight binary or BCD) and converting it to a voltage or current that is proportional to the digital value.

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Clock Frequency and Resolution

The rate at which the ADC performs the conversion process, in this case 1 MHz or 1,000,000 cycles per second.

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Analogue to Digital Conversion (ADC)

The process of converting an analogue signal, such as music or voice, into a digital format for storage, for example, MP3.

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Digital to Analogue Conversion (DAC)

Digital to Analogue Conversion (DAC) is the process of converting digital data into an analog signal.

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Analogue to Digital Conversion (ADC)

One of the simplest version of the ADC. It uses a binary counter and allows the clock to increment the counter one step at a time until Vo ≥ Vin. It is called digital-ramp ADC because the waveform at Vo is a step-by-step ramp (a staircase like waveform). The digital-ramp ADC contains a DAC, an analogue comparator and a control AND gate. The comparator output serves as the active-LOW end-of-conversion signal.

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Analogue to Digital Conversion (ADC)

The A/D conversion process is more complex and time consuming than the D/A process and many different methods have been developed and used.

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Analogue Signals and Digital Signals

Refers to the pattern of voltage fluctuations carried by wires and amplifiers, as in the case of a small loudspeaker in a telephone.

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Analogue to Digital Conversion (ADC)

An amplifier used in D/A conversion that gives different weights to the binary inputs.

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Analogue Signals and Digital Signals

Continuous signals that vary in time and amplitude.

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Analogue to Digital Conversion (ADC)

Analog to Digital Converter (ADC) is a device that converts continuous analog signals into discrete digital numbers.

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Resolution of DAC

The smallest change in output voltage that can be produced by a DAC.

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Resolution of DAC

When the counter is at 1112, the DAC output is at its maximum value of 7V; that is the Full-Scale Voltage (FSV).

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Resolution of DAC

The maximum voltage that an ADC can convert to a digital value, in this case 12V.

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Analogue to Digital Conversion (ADC)

A circuit that samples the input analogue signal and holds its value until the next sample is taken.

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Types of Analogue to Digital Converters

An analog to digital converter that uses no clock signal, has almost instantaneous conversion, and the conversion time depends only on the propagation delays of the comparators and encoder logic, typically of the order of 15 - 20 ns.

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Analogue to Digital Conversion (ADC)

The stage where the analogue signal is converted into a digital representation.

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Digital to Analogue Conversion (DAC)

For D - A conversion an input for a voltage reference, V ref , is required. This reference voltage is used to determine the full - scale output or maximum voltage that the D - to - A converter can produce.

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Digital to Analogue Conversion (DAC)

For each input number, the D - to - A converter output a unique voltage value. The analogue output voltage, V OUT is proportional to the input binary number.

Study Smarter, Not Harder

Study Smarter, Not Harder