Examples of 'sigma-delta' in a sentence
Meaning of "sigma-delta"
sigma-delta (noun) - a type of analog-to-digital conversion method that uses oversampling and noise shaping to achieve higher resolution
How to use "sigma-delta" in a sentence
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sigma-delta
Sigma-delta modulation of the first order.
An important feature of a sigma-delta converter is its linearity.
Two sigma-delta modulators are used in this embodiment.
This invention relates to bandpass sigma-delta modulators.
Outputting the sigma-delta data sequence to memory.
The oscillators are used as a resonator for sigma-delta modulators.
An efficient sigma-delta modulator has high value gain.
This phenomenon can cause oscillation of the sigma-delta converter.
Many alternative sigma-delta modulator architectures may be envisaged.
The result will then be a higher order sigma-delta modulator.
The sigma-delta converter also comprises a feedback loop.
The number of integrators defines the order of a sigma-delta converter.
The sigma-delta data sequence is then sent to memory.
This also increases rejection relative to noise generated by sigma-delta modulator 9.
This may involve sigma-delta modulation and phase splitting.
See also
An output of the differential amplifier coupled to an input of a sigma-delta modulator ; and.
The sigma-delta converter is often provided with a lowpass filter function.
The present invention may be incorporated in one or both sigma-delta converters.
The converter comprises a sigma-delta modulator in series with a numerical decimation filter.
Therefore, oversampling is usually coupled with noise shaping see sigma-delta modulators.
The quality of the sigma-delta modulator is related to the resonator quality factor.
Number p of analog integrators generally defines the order of the sigma-delta modulator.
In the invention, a particular type of sigma-delta modulator that generates overflows is used.
Sigma-delta converter typically comprises a sigma-delta modulator and a digital filter.
It increases the order of the sigma-delta modulator and therefore its performances.
The digital integration is performed at the oversampling frequency of the sigma-delta modulator.
By using a sigma-delta modulator, the conversion process is simple and can be done quickly.
The excitation resonator may form part of a second distinct sigma-delta modulator.
Digital to digital Sigma-Delta modulator and digital frequency synthesizer incorporating the same.
One of the main difficulties is the operating stability of the sigma-delta modulator.
In one particular embodiment of the sigma-delta modulator, the resonator may be a free oscillator.
There is a need to at least partly improve certain aspects of existing sigma-delta converters.
Low-pass sigma-delta modulators are made essentially around one or several integrating elements.
Also optionally, each reduction in dynamics is carried out by a Sigma-Delta modulation quantizer.
The sigma-delta modulator may for example be used in this way as a signal generator.
The quantization of the signals provided by the sigma-delta modulator is relatively coarse.
The sigma-delta modulator according to the invention may comprise one or several resonators.
Accordingly, a continuous time bandpass sigma-delta modulator can be regarded as a feedback control loop.
It goes without saying that this seriously degrades the performance of the sigma-delta converter.
The output of the second sigma-delta represents the product of the two signals.
In this case, an amplifier with variable gain is necessary for the sigma-delta modulator.
When the sigma-delta modulator is used as a signal generator, the resonator may be a free oscillator.
This local oscillator is preferably a frequency synthesiser which acts using sigma-delta synthesis.
Sigma-delta modulators are electronic devices that are now very frequently used in signal processing equipment.
The measurement system basically consists of an instrumentation amplifier and a subsequent sigma-delta modulator.
The output from the sigma-delta modulator is a sequence of samples having a limited number of values.
Its output signals are filtered and converted into analog form by the Sigma-Delta converter.
The first-order sigma-delta modulator has high quantization noise at the sampling frequency.
The values of the amplitudes should coincide with the output levels of the sigma-delta modulator.
Digitizing the amplified analog signal with a sigma-delta modulator to produce a digitized signal ; and.
