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 ?
A Novel Type Suppressed Noise Peak DC-DC Boost Converter Introducing Delta-Sigma Modulation Technique.
It has plenty of examples, problems, and practical discussions for students; in-depth coverage of topics such as noise considerations and sensing using delta-sigma modulation, for researchers; and plenty of immediately useful design and layout examples (with explanations), for working engineers.
Synthesizers, a major component in these tuners, have typically used delta-sigma modulation in a fractional multiples method.
Additionally, the LM4666's delta-sigma modulation technique lowers output noise and total harmonic distortion (THD) when compared to conventional pulse width modulation (PWM) Class D amplifiers.
Melanson received his first patent in 1976, and his most recently awarded patent was titled "Signal Processing System with Analog-to-Digital Converter Using Delta-Sigma Modulation Having an Internal Stabilizer Loop.
The direct digital, open loop scheme avoids the non-linearity caused by pulse width timing resolution limitations of silicon technology and does not use complex delta-sigma modulation, linearizing feedback loops, DSP error-correction or predictive error-compensating circuitry.
Instead of conventional pulse width modulation, Class-T employs multiple signal processing techniques, including adaptive/predicative processing, noise shaping, pre- distortion and delta-sigma modulation.
Instead of conventional pulse width modulation, employs multiple signal processing techniques, including adaptive/predicative processing, noise shaping, pre-distortion and delta-sigma modulation.
Key to this performance are the 1-bit, Delta-Sigma modulation scheme and a 50 Megahertz sampling frequency that ensures wide dynamic range and low distortion needed in High Definition Digital TV systems.
In particular, the LM4663 uses a continuous time delta-sigma modulation technique that lowers output noise, as well as THD, compared to conventional pulse width modulators.
05% (at 1 kHz, 1 W power) Dynamic range 105 dB A/D noise shaping 7th-order delta-sigma modulation Input jacks Dedicated bitstream digital IN jack x 1 RCA coaxial digital IN x 1 Square-type optical digital IN x 1 RCA analog IN x 3 Output jacks Square-type optical digital OUT x 1 RCA analog OUT x 1 Power source 120 V AC, 60 Hz Rated power consumption 75 watts External dimensions 300 (W) x 66 (H) x 411 (D) mm (11.