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WO/2004/107583A1 |
A circuit is provided having a secondary semi-analog FIR filter (100) connected to a primary filter via a coefficient to reduce the size of the sizes of the resistors (106) used in the primary filter. The coefficient may be one or more i...
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WO/2004/107584A1 |
The invention relates to a method for resampling at transmission and reception of a digital signal with digital band translation. According to the invention, a resampling (25) is performed upon reception of a bandpass signal, whereby the...
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WO/2004/105251A1 |
A sigma delta modulator includes a modulator module that includes a quantizer with variable hysteresis, which receives an input signal to perform necessary modulation operations. A non-linear mapping module receives a signal associated w...
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WO/2004/098062A2 |
An electronic circuit for processing a digital signal may include a plurality of digital delay circuits, each configured to produce a delayed replica of the digital signal; a plurality of digital-to-analog converters, each configured to ...
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WO/2004/094965A2 |
A noise shaping system including an inner loop and outer noise shaping loops. The inner noise shaping loop includes an inner loop filter and a quantizer for quantizing an output of the inner loop filter. The outer noise shaping loop incl...
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WO/2004/095704A2 |
A sigma delta circuit is provided having a sigma delta modulator (100) configured to operate according to a first clock signal (108) and a quantizer (110) connected to the sigma delta modulator, where the quantizer (110) is configured to...
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WO/2004/095710A1 |
An improved sigma-delta modulator is disclosed. The sigma-delta modulator (100) utilizes Micro Electro Mechanical System (MEMS) technology coupled with on-chip LC networks (110,118). MEMS switches are used to switch capacitors and induct...
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WO/2004/093324A1 |
A sigma-delta modulator (SDM) including n (n≥1) integrators in series, where a first of the n integrators receiving an input signal, at least one Q device, which acts as a quantizer when an absolute value of a signal input thereto is s...
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WO/2004/090570A2 |
The sensing device for sensing a physical parameter such as radiation, temperature or the like, comprises an analogue sensor element sensitive for the physical parameter to be sensed and outputting an analogue signal and an analogue two-...
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WO/2004/088843A2 |
A sigma demodulator (100) includes an input (X) for receiving an input signal and an output configured to add (108) a first error value (1), which is derived from an output signal, to an incoming input signal (2), and a subtraction compo...
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WO/2004/088862A1 |
A receiver and method is provided for sigma-delta converting an RF signal to a digital signal and downconverting to a digital baseband signal. The RF signal is split into N phases, as can be accomplished using a sample and hold circuit (...
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WO/2004/079915A2 |
A digital to analog converter including an input for receiving an input signal, a ramp generator, and a delta-sigma modulator responsive to the input signal and an output of the ramp generator. An order of a noise shaping transfer functi...
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WO/2004/077678A1 |
A radio frequency analogue to digital converter achieving high accuracy over a limited bandwidth comprises high gain amplifiers (12, 13, 14) incorporating bandpass filters in the form of single tunable resonators (15, 16) tuned so that t...
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WO/2004/068727A2 |
Interference caused by the propagation of a transmit signal transmitted from a transmit antenna (14) to a receive antenna (16) is effectively cancelled by an improved signal cancellation system (fig.1). The system includes an interferenc...
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WO/2004/066540A2 |
A digital-to-analog converter ('DAC') system utilized chopping modulation technology to remove 1/f and other baseband noise from a baseband of a signal of interest. Chopping modulation and demodulation circuitry of the DAC operate at a c...
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WO/2004/066642A2 |
A signal processing system utilizes chopping modulation (502) and demodulation circuit (508) using direct and cross-over switches (538, 540, 542, 544) to modulate low frequency noise, such as 1/f noise, out of a signal baseband. Chopping...
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WO/2004/064485A2 |
A digital-to-analog converter ('DAC') system utilizes notch filters and chopping modulation technology to remove 1/f and other baseband noise from a baseband of a signal of interest. Chopping modulation and demodulation circuitry of the ...
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WO/2004/057757A1 |
Noise during muting can be suppressed in an audio amplifier having a D-class power amplifier. The audio amplifier includes a sampling rate converter circuit (23) for sampling-rate converting a digital audio signal S11 into a digital audi...
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WO/2004/051860A2 |
The invention relates to a transmission configuration for transmitting signals, particularly measurement or control signals in analog form, comprising a direct current (DC) D/A converter circuit (12') for a DC useful signal. Said D/A con...
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WO/2004/051856A2 |
A digital to analog converter (Fig 1A). including a noise shaping a modulator (102) for modulating an input digital data stream (101), a plurality of output elements (103) for generating a plurality of intermediate data streams from a mo...
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WO/2004/049561A1 |
A pulse width-modulated noise shaper (410) is described, which employs feedback from the power stage (260). Formation of the pulse width-modulated signal is done by applying a digital noise shaper (410) which uses feedback from the outpu...
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WO/2004/045651A1 |
The invention relates to compounds having general formulae I, II and III, which can be used to diagnose and monitor diseases associated with the deposit of amyloid proteins in the central nervous system. The invention also relates to the...
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WO/2004/042932A2 |
A continuous time sigma delta converter has a filter (510) and converter components (530, 540) having known non-ideal characteristics. A compensation circuit (570) has error modelling components arranged to model the non-ideal characteri...
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WO/2004/040770A1 |
An audio signal reproduction device includes: a seven-dimensional delta-sigma modulation circuit for receiving a PCM signal and delta-sigma modulating the PCM signal; a PWM circuit for pulse-width modulating the signal output from the se...
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WO/2004/039021A1 |
Analog signals can be fully encoded as an asynchronous time sequence generated by a time encoding machine (TEM). With knowledge of the parameters of the time encoding machine, the asynchronous time sequence can be decoded using a non-lin...
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WO/2004/034588A1 |
The invention relates to a controlled power source with a control input, in particular for a digital/analogue converter in continuous time sigma/delta modulators, comprising a current source (4), with a control input, which generates an ...
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WO2002047359B1 |
A distortion removal system (16) for reducing the quantization distortion that results from quantization of a signal by sample-by-sample quantization techniques is disclosed. The distortion removal system (16) uses the signal previously ...
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WO/2004/032333A1 |
A noise shaper includes a first feedback loop for noise shaping a first feedback signal under normal operating conditions and having a first filter (201) with a first signal transfer function and a second feedback loop that is stable und...
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WO/2004/030211A2 |
The invention relates to a circuit configuration for determining the average value of an input signal (s), comprising a signal input (1) for receiving the input signal (s) and comprising a signal output (13) for outputting an output sign...
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WO/2004/030220A1 |
Disclosed is a time-interleaved bandpass delta-sigma modulator, which includes a first adder and a second adder and a comparator. An input signal is inputted to the first adder according to an each channel block-s clock frequencz, and an...
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WO/2004/030222A1 |
A signal processing apparatus (200, 800), preferably suitable for implementation as an integrated circuit, that is arranged and constructed to be shared for processing a plurality of signals without interference between the signals and m...
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WO/2004/030221A1 |
Sigma-delta modulation is provided, wherein an input signal is feeded to at least two parallel filters, a first one of the filters preferably being a lower order filter and a second one of the filters preferably being a higher order filt...
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WO/2004/030223A2 |
Systems and methods are described for full bridge integral noise shaping for quantization of pulse width modulated signals. A method for full bridge integral noise shaping comprises: receiving a first and a second reference PWM signal (4...
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WO2002071618A9 |
A method and system for selecting implementation of a filter controller between a single conversion that ensures a fully-settled converted output and a continuous conversion of an input signal are disclosed. State machine (400) deterines...
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WO/2004/028000A2 |
An improved complex-IF digital receiver (10) has various improvements. The improved complex-IF digital receiver (10), for single or dual band applications, preferably synchronizes all of the signals to each other, which may be an integer...
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WO/2004/025837A1 |
A multi-bit continuous-time sigma-delta analog-to-digital converter (10) provides a digital output signal as a digital representation of an analog input signal. The converter performs several functions in providing the digital output sig...
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WO/2004/025398A2 |
A delta to sigma modulator (fig. 2A) or analog to digital converter uses a mirrored integrator (120). (The mirrored integrator has a frequency response function that is a mirror image - about half the Nyquist frequency - of a conventiona...
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WO/2004/023658A1 |
The configuration for the digital-analog conversion comprises a delay device having at least one first delay element, whereby optional additional delay elements are connected downstream from the first in a serially consecutive manner. Th...
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WO/2004/023661A1 |
A fractional divider (28) includes a latch (31) for holding division data, a &Dgr Σ modulator (33), a digital dither circuit (32) for receiving a digital input F representing the fractional portion of the division data from the latch (3...
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WO/2004/017522A1 |
A method and system for integrating a mismatch noise shaper (108) into the main loop of a delta-sigma modulator (100) are disclosed. The output of the mismatch noise shaper (108) is fed back to the summer (102) as a feedback signal that ...
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WO/2004/015872A1 |
A digital signal processing device for outputting a 1-bit signal by using a &Dgr Σ modulation device includes: a quantization device (33) for quantizing an integrated output of a sixth integrator (30), generating a 1-bit signal output w...
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WO/2004/013972A2 |
A noise shaper including first and second quantizers and first and second feedback paths each providing feedback from a corresponding quantizer output. A loop filter system implements a plurality of transfer functions including a first n...
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WO/2004/010587A1 |
An adder (2) and a delay device (4) constitute a 20-bit input accumulator, which is connected to a signal input terminal (1). An adder (8) and a delay device (10) constitute a 9-bit input accumulator. The most significant 8 bits of outpu...
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WO/2004/008643A1 |
A sigma delta modulator having an integrator with a first input for coupling to an analog signal and a second input for coupling to a reference voltage. A comparator has a first input coupled to an output of the integrator and a second i...
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WO/2004/006439A1 |
A quantizer adapted for use with a delta-sigma analog-to-digital converter. The quantizer includes first and second comparators adapted to compare an input analog signal to a threshold and provide a digital output in response thereto. Fi...
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WO/2004/006440A1 |
A noise shaper including a filter system (501a, 50b) for generating a first set of poles and zeros characterizing noise attenuation in a signal baseband of a noise transfer function and at least one additional set of at least one pole an...
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WO/2004/004131A2 |
The circuit arrangement has a sigma-delta converter (2) for converting an analog input signal into a digital output signal. The sigma-delta converter (2) contains a loop filter, a comparator connected downstream of the latter and a feedb...
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WO/2004/004120A2 |
Switched-capacitor filter for filtering the output signal of a digital-to-analog converter augmented with Direct Charge Transfer (DCT) techniques. A digital-to-analog converter augmented with DCT and correlated double sampling (CDS) tech...
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WO/2003/105348A1 |
An integrator stage for use in a delta sigma modulator includes an operational amplifier (312), an integration capacitor (CI) coupling to an output of the operational amplifier (312) and a summing node at an input of the operational ampl...
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WO/2003/100984A1 |
The invention relates to a Sigma Delta A/D converter (2) for generating a N-bits digital output signal (4) on the basis of an analogue input signal (6), comprising a control loop which comprises a quantizer (8) comprising at least a comp...
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