sigma-delta converter


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sigma-delta converter

[‚sig·mə ‚del·tə kən′vərd·ər]
(electronics)
A class of electronic systems containing both analog and digital subsystems whose most common application is the conversion of analog signals to digital form, and vice versa, using pulse density modulation to create a high-rate stream of single-amplitude pulses in either case. Also known as delta-sigma converter.

sigma-delta converter

A circuit that generates a 1-bit pulse density modulated (PDM) signal from analog input. It creates fixed-width pulses in relation to the amplitude of the analog waveform. As the wave amplitude rises, 1's are produced. As it falls, 0's result. If it remains neutral, alternating 01's are created. See PDM and SACD.
References in periodicals archive ?
ADI), a global leader in high-performance signal processing technology and the data converter market share leader*, today introduced a multiplexed 24-bit sigma-delta A/D converter that doubles the throughput rate of alternative sigma-delta converters while dissipating less power.
Four 18-bit DACs with an 18-bit stereo ADC, -- Four on-board DAC channels, -- Symmetrical mixer for 4-channel playback of analogue sources, -- Selectable 3D stereo enhancement (Analogue 3D stereo enhancement), -- Variable rate audio and modem support (VRA), -- Mono inputs for phone and dual microphone, -- Master/Slave ID selection, -- Stereo inputs for line, aux and video, -- Pseudo-differential CD input that minimizes cross-talk, -- Sigma-delta converter architecture, -- >95dB SNR (DAC), >88dB SNR (ADC) -- External amplifier power down control -- Low power (100mW @3V) -- Line level outputs
1 percent error in energy accuracy over a wide dynamic range of 2400:1, enabled by three independent 24-bit sigma-delta converters supporting anti-tamper.
Adams, who is known for his contributions to the development of ground-breaking multi-bit sigma-delta converters, the invention of log-domain filters, and the design of the first monolithic asynchronous sample-rate converters for digital audio, was recognized for his pioneering work in the field of advanced audio engineering.
April 17 /PRNewswire/ -- Innovative Integration delivers Delfin, a performance-oriented DSP card for PCI-based data acquisition, playback and co-processing with a high channel count of analog I/O using sigma-delta converters up to 192kHz.
Key features include advanced sigma-delta converters, which are used alongside digital decimation filters, to give high quality audio at sample rates from 8kHz to 48 kHz.
In discussing system-level IC products, Fishman said that Analog's long standing expertise in high-speed converters, sigma-delta converters, precision linear products, mixed-signal system ICs, and DSP ICs, and in particular, the combination of precision linear and DSP, have provided a significant competitive advantage in providing system level products for applications that require increasing levels of performance and integration.
The NI FlexII ADC incorporates patented NI methods for reducing the linearity and temperature drift errors inherent to multi-bit sigma-delta converters to achieve unprecedented dynamic range at high sample rates.
As the cost of high-resolution sigma-delta converters continues to drop, the technology is becoming more accessible, and chip manufacturers are called upon to provide more options for designers of high-resolution measurement systems in which performance, space and power consumption are critical," said Mike Britchfield, product line director for sigma-delta converters, Analog Devices.