摘要:
An angular velocity sensor with a stable output characteristic using a sigma-delta type analog-to-digital converter comprising an integrator unit (62) for integrating electric charges output from an input switching device (44) and a digital-to-analog converter unit (48) and holding at least two integrated values, a comparator unit (63) for comparing at least the two integrated values output from the integrator unit (62) with a predetermined value, and an arithmetic operation unit (73) for operating an output signal of the comparator unit (63), the arithmetic operation unit (73) provided with a differential operation unit (70) for computing a difference between at least two comparison signals output from comparator unit (63).
摘要:
Ein mehrkanaliger AD-Wandler zur Wandlung mehrerer analoger Eingangssignale in ein jeweiliges digitales Ausgangssignal weist einen ΣΔ-Modulator auf, der mehrere jeweils einem Eingangssignal zugeordnete Eingangskomparatoren, eine diesen über einen Multiplexer nachgeordnete Samplingeinheit und eine einen DA-Wandler sowie einen Filter aufweisende Rückkoppelschleife umfasst, über die das Ausgangssignal der Samplingeinheit zu den Eingangskomparatoren zurückgeführt ist, wobei die Eingangskomparatoren, der Multiplexer, die Samplingeinheit und der DA-Wandler in einem FPGA realisiert sind und der Filter als Analogfilter ausgeführt und außerhalb des FPGA vorgesehen ist.
摘要:
Apparatus for time multiplexed oversampled analog to digital modulation (700) is provided. Embodiments generally include a plurality of energy collection elements (702a and 702m) coupled to individual pixel processors (704a and 704m) preferably mounted proximate to each energy collection element. Each pixel processor shares a commons block of conversion logic (720, 722, 724) to form a plurality of integration loops to process the signal generated by each energy collection element. Specific embodiments are shown using CCD, CID, FET and charge well technologies.
摘要:
Interface unit (320) for voltage input signals comprising two or more input channels. The input signals of these two or more input channels (I 1 -I 7 ) are connected alternately by an analog multiplexer (204) to an analog-to-digital (A/D) converter (206). The A/D converter comprises an integrated sigma-delta modulator circuit (206) which generates a digitized 1-bit signal representing the input signal voltage level for a control unit (30) irrespective of whether the input channel signal is digital or analog. By means of the invention all input voltage channels (I 1 -I 7 ) are made similar such that the input channels (I 1 -I 7 ) of the interface unit can receive an analog or digital signal irrespective of each other.
摘要:
The invention relates to an analog-digital converter which comprises a multitude of integrating circuits, a 1 bit analog-digital converter and a 1 bit digital-analog converter. The multitude of analog integrating circuits are connected in series and the 1 bit digital-analog converter is connected downstream from the last analog integrating circuit of the series. An output signal of the 1 bit analog-digital converter is transmitted to the 1 bit digital-analog converter, and an output signal of the 1 bit digital-analog converter is subtracted from an input signal of each analog integrating circuit. A multitude of input signals is transmitted via a multiplexer to the first analog integrating circuit of the series-connected analog integrating circuits. Each analog integrating circuit comprises a multitude of capacitors which correspond to the multitude of input signals, whereby a capacitor of the multitude of capacitors can be switched each time between an output and an input of the analog integrating circuit. The output signal of the 1 bit digital-analog converter is delayed according to the multitude of input signals.
摘要:
A Δ Σ type AD converter includes a local D/A converter having a SC integrator which is constructed by an analog switch operated at the first and second timings of an input (1), an analog switch operated at the first and second timings of an input (2), an analog switch operated at the first and second timings without selection of the input, a capacitor charged and discharged by these analog switches and an operational amplifier (21), a comparator (22), a D-type flip-flop (28), a switch (29) and reference voltage sources (30, 31).