摘要:
The present invention disclosed an all-digital speaker system device based on multi-bit Σ-Δ Modulation, comprising an A/D converter, an interpolation filter, a Σ-Δ modulator, a dynamic mismatch regulator, a differential buffer and a speaker array. The present invention takes advantage of the Σ-Δ modulation technique to effectively reduce the cost and complexity of the hardware realization of the speaker system device, thus realizing the full digitalization of the whole sound transmission link and the integration of the system device with low power dissipation and volume. Furthermore, the system device according to the present invention is provided with a better control ability on the local sound field, thus providing a better practicable method for the voice secret transmission.
摘要:
An electronic system includes a configurable processing device. The configurable processing device includes a processor that performs digital processing, a first input that receives digital signal, a first output that sends digital signal and a converter that converts between analog and digital signals. The converter includes a delta-sigma modulator.
摘要:
A system for galvanic isolation between an analog input signal and an analog output signal, which system performs an analog to digital conversion of the input signals into input digital data. As a result, input parameters can be corrected in a nearly perfect way.
摘要:
The present invention relates to a two- or multiple-stage analog to digital converter (300). The converter preferably includes an incremental ADC (200) in the first stage. The incremental ADC (200) comprises an integrator (210) and a comparator (220). After the predefined number of comparisons performed by the comparator (220), the output of the integrator (210) appropriately scaled (g) is provided to the second stage (310, 320, 330) where it is further sampled (320). In particular, the scaling gain (310) is inversely proportional to the integrator gain (g). The second ADC (330) performs the conversion of the remaining least significant bits (D2) and then the output of both stages (D1, D2) is combined (340, 350). Moreover, a calibration and correction approaches are provided for the multi-stage ADC.
摘要:
An object of this invention is to realize, with a single-ended configuration, an A/D converter which performs integral A/D conversion, and cyclic A/D conversion of a residual analog signal thereof. According to this A/D converter, a first A/D conversion operation for performing integral A/D conversion and a second A/D conversion operation for performing cyclic A/D conversion are realized based on control of operational procedures in a same circuit configuration. Moreover, in the first A/D conversion operation, since a capacity of a capacitor used in the integration of an output signal is greater than a capacity of a capacitor used for storing an input analog signal and a standard reference voltage, the analog signal that is input in the integral A/D conversion is attenuated according to the capacity ratio and subject to sampling and integration. Consequently, the voltage range of the analog signal that is output in the integral A/D conversion also decreases according to the capacity ratio of the capacitors, and the A/D converter can be therefore constructed with a single-ended configuration.
摘要:
Each of plural sigma-delta modulators (M1, M2) having a sampling capacitor (CS11, CS12, CS21, CS22), an integrator (Amp1, Amp2), and a quantizer (Cmp1..Cmp5) are connected to each other in parallel. Each of the sigma-delta modulators conducts parallel oversampling in which an analog input signal (Vin) is sampled by a sampling capacitor, and the sampling result is quantized by the integrator and the quantizer. Then, the quantized values of the sigma-delta modulators are added to obtain MSBs, the residue values of the integrators after quantizing in the respective sigma-delta modulators are added, and the addition result of the residue values is converted analog-to-digital to obtain LSBs.
摘要:
L'invention concerne un convertisseur analogique/numérique incluant un premier module (100) du type ayant une série d'étages de traitement, ces étages de traitement réalisant chacun deux conversions d'abord analogique/numérique puis numérique/analogique du signal de sortie de l'étage précédent, puis une soustraction du signal ainsi obtenu au signal de sortie de l'étage précédent pour fournir ainsi le signal de sortie analogique dudit étage, ledit premier module (100) comportant en outre des moyens pour assembler les signaux numérisés par chaque étage (S 1 ..., S i ) afin de former un signal numérique (S N (nT)) qui représente sous une forme numérique le signal d'entrée (e(nT)) du convertisseur, caractérisé en ce que le convertisseur inclut en outre un modulateur delta-sigma (210) qui numérise le signal de sortie (b(nT)) d'un desdits étages ainsi que des moyens pour soustraire le signal ainsi numérisé audit signal numérique assemblé (S N (nT)).
摘要:
An analog-to-digital converter (ADC) using an amplifier-based noise shaping circuit. The amplifier-based noise shaping circuit generates a noise shaping signal. A comparator of the ADC has a first input terminal coupled to an output terminal of a capacitive data acquisition converter that captures an analog input, a second input terminal receiving the noise shaping signal, and an output terminal for observation of the digital representation of the analog input. The amplifier-based noise shaping circuit uses an amplifier to amplify a residual voltage obtained from the capacitive data acquisition converter and provides a switched capacitor network between the amplifier and the comparator for sampling the amplified residual voltage and generating the noise shaping signal.