principles of sigma delta conversion for analog to digital converters
principles of sigma delta conversion for analog to digital converters
... version
” of a 1-bit delta modulator.
The name
Sigma- Delta
modulator comes from putting
the integrator (sigma) in front of the delta modulator.
Sometimes, the Σ−∆ modulator is referred to as an in-
terpolative ... Modulation from
Delta Modulation
Block Diagram of Sigma- Delta Modulation
S-Domain Analysis of Sigma- Delta Modulator
Block Diagram of First-Order S...
Báo cáo hóa học: " Research Article Multirate Formulation for Mismatch Sensitivity Analysis of Analog-to-Digital Converters That Utilize Parallel ΣΔ-Modulators" pdf
... and P. L
¨
owenborg, “A general formula-
tion of analog- to- digital converters using parallel sigma- delta
modulators and modulation sequences,” in Proceedings of the
Asia-Pacific Conference on ... Article
Multirate Formulation for Mismatch Sensitivity
Analysis of Analog- to- Digital Converters That Utilize
Parallel ΣΔ-Modulators
Anton Blad, H
˚
akan Johansson, and Per...
Báo cáo hóa học: " Multistage Quadrature Sigma-Delta Modulators for Reconfigurable Multi-Band Analog-Digital Interface in Cognitive Radio Devices" pot
... [dB]
STF
TOT
ISTF
TOT
NTF
TOT,3
INTF
TOT,3
−64 −32 0 32 64
−100
−50
0
Noise (1st) Gain [dB]
NTF
TOT,1
INTF
TOT,1
INTF
TOT,2
Figure 8 Three-stage QΣΔM STF and ISTF (top) together with ... [dB]
STF
TOT
ISTF
TOT
NTF
TOT,3
INTF
TOT,3
−64 −32 0 32 64
−100
−50
0
Noise (1st) Gain [dB]
NTF
TOT,1
INTF
TOT,1
INTF
TOT,2
Figure 9 Three-stage QΣΔM STF and ISTF (top) together with ... becau...
Analog-to-Digital Conversion
... back to an analog signal for people to hear. The
process to convert digital signals to analog signals is completed by a DAC. The most commonly
used technique to convert digital signals to analog ... and digital signals.
ANALOG- TO- DIGITAL CONVERSION 43
FIGURE 3.2: A photo of a walking robot.
intensity changes in the spatial axis. The same analysis can be per...
Tài liệu 05 Analog-to-Digital Conversion Architectures docx
... of signal processing tasks have been shifted from the
usualanalogdomaintodigitaldomain. Fordigitalsystemstointeractwithanalogsignalsources,such
as voice, data, and video, the role of analog- to- digital ... data conversion with such variations of process
parameters.
5.3 Digital -to -Analog Converter Architecture
The digital -to -analog (D/A) converter, also known as a DAC,...
Báo cáo hóa học: " Research Article Modified Polar Sigma-Delta Transmitter for Multiradio Applications" pptx
... are digital. Therefore, as shown
in Figure 1, two Digital -to -Analog Converters (DACs) need
to be employed before the upconversion stage. The sampling
frequency of DACs is chosen according to the ... reduced by
factor of 4 by using an extra parallel resistor R
s
. This resistor
is chosen such that the parallel combination of the dumping
resistor R
2
and the resistor R
s
equa...
Báo cáo hóa học: "Efficient Realization of Sigma-Delta (Σ-Δ) Kalman Lowpass Filter in Hardware Using FPGA" ppt
... value of the forgetting factor that
needs to be used in the full-rate Kalman filter for a given
oversampling ratio. Figure 3 shows the filtered error as a
function of the number of iterations, for ... selection of the for-
getting factor γ.
For a second-order modulator, m
= 2, it can be shown
that using the following values for γ, the Kalman filter would
result in the same m....
Báo cáo hóa học: " Analog-to-Digital Conversion Using Single-Layer Integrate-and-Fire Networks with Inhibitory Connections" potx
... P.M.Aziz,H.V.Sorensen,andJ.V.D.Spiegel, “Anoverview
of sigma- delta converters, ” IEEE Signal Processing Magazine,
vol. 13, no. 1, pp. 61–84, 1996.
[11] B. L. Shoop, Photonic Analog- to- Digital Conversion, Springer
Series ... typical scheme for increasing the sampling rate is to use
multiple analog- to- digital converters in a mux-demux architecture.
The performance of...
Chapter 5. Principles of Electromechanical Energy Conversion ppsx
... reluctance torque component. The last term in
the torque expression, however, is only related to the relative position of the stator and rotor
and is independent of the shape of the stator and rotor ...
Because of the salient (not round) structure of the rotor, the self inductance of the stator is a
function of the rotor position and the first term on the right hand side of...
Báo cáo hóa học: "Research Article Adaptive Reference Levels in a Level-Crossing Analog-to-Digital Converter" pdf
... condition is met, the sequence of LC samples of
x
t
denotes amplitude changes in the sequence of uniform
samples of x
t
,henceitcanbemappedtoanequivalent
sequence of uniform samples accordingly. Perfect ... updates the
set of on comparators. The asynchronous digital circuitry
processes the output of the analog circuitry, recognizes the
proper times for each of the LCs, t...