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Delta-sigma modulation is a technique that encodes analog signals into low bit depth digital signals at a high sample-frequency and then demodulates them to a lower sampling-frequency. It achieves high quality by using negative feedback to correct quantization errors and move quantization noise to higher frequencies.
Learn how an ADC converts an analog signal into a digital signal, and how its performance is measured by resolution, bandwidth, SNR and ENOB. Compare different ADC architectures and applications, and see examples of ADC chips and circuits.
A digital-to-analog converter (DAC) is a system that converts a digital signal into an analog signal. DACs are used in audio, video, communications and other applications, and have various architectures and figures of merit.
A 1-bit DAC (sometimes called Bitstream converter by Philips) is a consumer electronics marketing term describing an oversampling digital-to-analog converter (DAC) that uses a digital noise shaping delta-sigma modulator operating at many multiples of the sampling frequency that outputs to an actual 1-bit DAC (which could be fully differential to minimize crosstalk). [1]
Learn how to measure the dynamic range of an analog-to-digital converter (ADC) using ENOB, a quality indicator that compares the SINAD of the ideal and real ADCs. Find the definition, formula, examples, and references of ENOB on Wikipedia.
Delta modulation is a signal conversion technique that encodes the difference between successive samples into 1-bit data streams. The block diagram shows the modulator and demodulator components, and the principle explains the transfer characteristics, output signal power, bit-rate, and history of delta modulation.
Pulse-width modulation (PWM) is a method of representing a signal as a rectangular wave with a varying duty cycle. PWM is useful for controlling the average power or amplitude of electrical signals, and is widely used in electronics, motors, and communication systems.
Noise shaping is a technique that alters the spectral shape of the error introduced by quantization or bit-depth reduction of a signal. It aims to increase the ...