Abstract:
A compensating quantity-providing circuit includes a frequency signal generator having an output for a frequency signal the frequency of which depends on mechanical stress in a circuit, and a compensating quantity provider having an input for the frequency signal and an output for a compensating quantity which is based on the frequency signal.
Abstract:
A multi-bit sigma/delta converter for converting an analog input signal into a digital output signal comprises a filter device for filtering the analog input signal which is added to a feedback signal to form an intermediate signal. An integrator device for integrating the filtered intermediate signal added to an inner feedback signal forms a quantizer input signal. A quantizer device quantizes the quantizer input signal to form the digital output signal. An inner feedback digital/analog converter is provided for converting the digital output signal directly into the inner feedback signal. A DEM device for performing dynamic element matching on the digital output signal and providing a matched digital signal is provided and a feedback digital/analog converter for converting the matched digital signal into the feedback signal is implemented.
Abstract:
The invention relates to a circuit arrangement for production of a rest signal after a supply voltage (Vdd) has fallen and risen again, which circuit arrangement has two cross-coupled inverters (INV1, INV2) and an initialization circuit (S) which is connected to the input of one of the inverters (INV2), in which case the outputs of the inverters (INV1, INV2) are capacitively connected asymmetrically, and/or in which case the inverters (INV1, INV2) have different transfer voltages.
Abstract:
Described is a magnetic field sensor with a Hall element and a rectangular change-over switch, which controls the Hall element, dependent upon a timing signal. An active ladder-type filter creates a low pass filtered outlet signal. It uses OTA modules, which work with gyrator switching. By means of a chopper operation, capacitors, dependent on the timing signal, are charged alternately from the outlets of the OTA modules.
Abstract:
A system including a first circuit, a second circuit, and a feedback circuit. The first circuit is configured to provide input signals. The second circuit is configured to receive the input signals and provide digital output signals that correspond to the input signals. The feedback circuit includes a chopping circuit, an integrator circuit, and a digital to analog converter circuit. The digital to analog converter circuit is configured to convert an error signal into an analog signal that is received by the second circuit to reduce ripple error.
Abstract:
Embodiments relate to stress sensors and methods of sensing stress. In an embodiment, a stress sensor comprises a vertical resistor. The vertical resistor can comprise, for example, an n-type resistor and can have various operating modes. The various operating modes can depend on a coupling configuration of terminals of the resistor and can provide varying piezo-coefficients with very similar temperature coefficients of resistances. Comparisons of resistances and piezo-coefficients in differing operating modes can provide a measure of mechanical stresses acting on the device.
Abstract:
The present disclosure relate to a sensor system having a low offset error. In some embodiments, the sensor system comprises a sensor configured to generate a sensor signal, which is provided to a main signal path having a first chopping correction circuit and a second chopping correction circuit. The first and second chopping correction circuit chop the sensor signal at first and second frequencies to reduce offset errors, but in doing so generate first and second chopping ripple errors. A first digital offset feedback loop generates a first compensation signal, which is fed back into the main signal path to mitigate the first chopping ripple error. A second digital offset feedback loop generates a second compensation signal, which is fed back into the main signal path to mitigate the second chopping ripple error.
Abstract:
Embodiments relate to current sensors and methods. In an embodiment, a current sensor comprises a conductor portion having a first portion and a second portion; at least three slots formed in the conductor portion between the first and second portions, each of the at least three slots having a length and at least one tip portion; at least two bridge portions each having a width separating two of the at least three slots and a length coupling the first and second portions; a first contact region disposed relative to the first portion and a second contact region disposed relative to the second portion; and at least one pair of magnetic sensor elements, a first pair of magnetic sensor elements arranged relative to and spaced apart from a first of the at least two bridge portions.
Abstract:
One embodiment of the present invention relates to a magnetic sensor circuit having a magnetic field sensor device configured to generate a digital signal proportional to an applied magnetic field. An analog-to-digital converter converts the analog signal to a digital signal that is provided to a digital signal processing unit, which is configured to digitally track the analog output signal. The digital tracking unit comprises a delay removal circuitry configured to generate a plurality of digital signal component corresponding to a chopping phase. A non-delayed offset compensated digital output signal may be generated within the chopping phase by mathematically operating upon (e.g., adding or subtracting) the plurality of digital signal components, generated by the delay removal circuitry.
Abstract:
A vertical Hall sensor circuit includes an arrangement comprising a vertical Hall effect region of a first doping type, formed within a semiconductor substrate and having a stress dependency with respect to a Hall effect-related electrical characteristic. The vertical Hall sensor circuit further includes a stress compensation circuit which comprises at least one of a lateral resistor arrangement and a vertical resistor arrangement for generating a stress-dependent lateral resistor arrangement signal based on a reference signal provided to the stress compensation circuit, and for generating a stress-dependent vertical resistor arrangement signal based on the reference signal, respectively. The vertical Hall sensor circuit further includes a first circuit for providing a first signal to the arrangement based on at least one of the stress-dependent lateral resistor arrangement signal and the stress-dependent vertical resistor arrangement signal.