Abstract:
An analog sensor (100, 500, 600, 700, 800, 900) with digital compensation function comprises: a deformation part (102) generating a deformation according to a pressure sensed by the analog sensor (100, 500, 600, 700, 800, 900), a strain gauge (104) connected to the deformation part (102) and generating a change in the resistance according to the deformation, a strain gauge bridge (106) connected to the strain gauge (104) and transferring the change in the resistance of the at least one strain gauge (104) to output a first analog signal, an analog-to-digital conversion module (108, 508, 708, 808, 908) connected to an output of the strain gauge bridge (106), receiving the first analog signal from the strain gauge bridge (106) and converting the first analog signal to a first digital signal, where the first analog signal is an analog signal representative of weight, an analog output port (116) for outputting a second analog signal, and a signal processing and output circuit (110, 510, 610, 710, 810, 910) connected between the output of the analog-to-digital conversion module (108) and the analog output port(116), compensating and converting the first digital signal into the second analog signal. The analog sensor (100, 500, 600, 700, 800, 900) may achieve high-accuracy compensation while keeping the interfaces of the analog weighing sensor to be simple.
Abstract:
In one or more embodiments, an apparatus and method for processing an analog signal into a digital signal includes a quantizer that converts the analog signal, which can have any value within a given range of values, into a fixed set of discrete values. An analog residue, i.e. the quantization error caused by the difference between the analog value of the integrated analog signal and the closest corresponding discrete quantized value, is outputted. The analog residue can be further processed to increase the accuracy of the A/D conversion. Multiple quantizer stages can be provided to perform A/D conversion of the analog signal over multiple integration periods, e.g. in multi-shot and time-delay integration applications. The analog signal may represent an image signal.
Abstract:
Verfahren und Vorrichtung zur Umschaltung und zum Signalvergleich bei einem Rechnersystem mit wenigstens zwei Verarbeitungseinheiten, wobei Umschaltmittel vorgesehen sind und zwischen wenigstens zwei Betriebsmodi umgeschaltet wird, wobei Vergleichsmittel vorgesehen sind und ein erster Betriebsmodus einem Vergleichsmodus und ein zweiter Betriebsmodus einem Performanzmodus entspricht, dadurch gekennzeichnet, dass wenigstens zwei analoge Signale der Verarbeitungseinheiten verglichen werden, indem wenigstens ein analoges Signal in wenigstens einen digitalen Wert gewandelt wird.
Abstract:
An analog portion of a mixed-mode integrated circuit system includes a plurality of analog input cells, a plurality of analog output cells, and an interconnect array. The input cells are configured to program analog functions. The output cells are configured to provide Analog and digital outputs corresponding to the programmed analog functions. The interconnect array processes the programmed analog functions into signals indicative of the analog functions. The interconnect array selectively provides the signals to the plurality of analog output cells.
Abstract:
Power measurement equipment is used to calculate the momentary value of the power actually taken from a network in which both current and voltage are variable, the voltage to a lesser but perceptible extent, the current in a distinct manner, as its effective value substantially determines the power, i.e. if current of a certain intensity is taken from the network, power has been taken, whereas if the current is practically zero, no power has been taken from the network. A multiplier circuit is disclosed for power or energy measurement equipment (P, W, 30, 40). A first measured (9) analogue signal (u) is supplied to a first sigma-delta converter (SDM1;10) whose output controls a multiplier (20; 20a, 20b, 20c, 20d; 21a, 21b, 22a, 22b). A second measured (19) analogue signal (i) is supplied to the multiplier (20). The output of the multiplier (20) is supplied to a second sigma-delta converter (SDM2; 30) which generates at its output an output signal (p(t)) which represents the momentary value of the product of the first analogue signal by the second analogue signal (u, i), hence the power to be measured.
Abstract:
An interference dependent adaptive phase clock controller method and system includes synthesis of a signal processing clock signal (307). An interference signal (311) dependent on a phase of the signal processing clock signal is measured, and a phase correction signal (317) is provided dependent thereon. A magnitude of the interference signal is reduced by adjusting the phase of the signal processing clock signal (307) dependent on the phase correction signal (317).
Abstract:
A digital-to-analog (D/A) convertor (206) multiplies an input signal by a sinewave approximation (300) to perform frequency translation. Optimized coefficient values are predetermined and are programmed based on a control word generated during a clock cycle. The programming over a time period representative of the frequency of the sinewave approximation (300) provides a signal that multiplies an input signal such that the effects of odd harmonics at an output are mitigated while the advantages of a traditional switching mixer are retained. In one embodiment the multiplying D/A convertor (206) includes a plurality of resistors (R1-R8) connected to an amplifier (400), with plural switching gates (G1-G8) switching select resistors (R1-R8) in and out of operation, a control word from counter/controller (203) controlling the gates (G1-G8).
Abstract:
A frequency synthesiser for generating a sinusoidal analogue signal comprises a digital signal generator for generating a substantially triangular digital signal. A digital to analogue converter (DAC) receives the digital signal. The DAC has a non-linear transfer function shaped to generate a sinusoidal analogue signal.
Abstract:
A method and apparatus for reducing spurious output noise in digital frequency synthesizers that employ a sine amplitude converter (16) connected to a Digital-to-Analog converter (18) for generating an analog waveform from sine amplitude data. The method comprises the steps of adding random or pseudorandom numbers which are scaled to have a predetermined magnitude to the sine amplitude data and transferring a resulting addend to the Digital-to-Analog converter (18). The apparatus comprises a summation circuit (22) connected between an output of the sine function converter (18) and an input of the digital-to-analog converter and connected to a random or pseudorandom number generator (24) at a second input. A scale element (26) adjusts the pseudorandom number magnitude to provide numbers having values in the range +/- 1/2 times a minimum quantization step or at least significant bit of the Digital-to-Analog converter (18) resolution where n is greater than or equal to 1.
Abstract:
A neural network is implemented by discrete-time, continuous voltage state analog devices in which neuron signals (9), synapse signals (7) and synaptic strength signals (15) are generated in highly parallel analog circuits in successive states from stored values of the interdependent signals calculated in a previous state. The neuron and synapse signals are refined in a relaxation loop (9), (5), (7) while the synaptic strength signals are held constant. In learning modes, the synaptic strength signals are modified in successive states from stable values of the analog neuron signals. The analog signals are stored for as long as required in master/slave sample and hold circuits (69) as digitized signals which are periodically refreshed to maintain the stored voltage within a voltage window bracketing the original analog signal.