Abstract: In an arrangement for measuring the rotational velocity of a rotatable wheel (21) at or in a vehicle (23) by means of a sensor (1) which is manufactured by a thin-film technology, which comprises magnetoresistive sensor elements (11, 12, 13, 14), and which measures a magnetic field modulated by means of a toothed structure (22) of the wheel (21) in dependence on the rotational velocity thereof, an optimized guidance of interference currents which may be induced through radiation from electromagnetic fields is achieved in that an electrically conducting layer (5) is provided at the outside of the sensor (1), which layer (5) reduces a capacitive coupling between the wheel (21) and the sensor elements (11, 12, 13, 14) which would occur without said layer (5), and which layer (5) in its turn is capacitively coupled to the wheel (21), in that the electrically conducting layer (5), which is made of a metal material, is manufactured by a thin-film technique at least at one side of the sensor (1) by means of layer d

Abstract: An arrangement for measuring a relative linear position between a sensor and a magnetic body, whose position relative to each other can be changed linearly in a predefined direction. The sensor is arranged as a magnetoresistive angle sensor, with little building expenditure and little sensitivity to external influences, and a magnetic strip is provided as the magnetic body, which strip includes a pair of magnetic poles and magnetic field lines running over its length at varying angles, so that the angle of the magnetic field penetrating the magnetoresistive angle sensor depends on the relative position of the magnetoresistive angle sensor to the magnetic strip and the relative position can be computed from the output signal of the magnetoresistive angle sensor.

Abstract: An angle sensor includes a lateral magnetic field sensor element (1) for producing a sensor signal (U.sub.S) which is dependent on the angular position of a target object (6) which is rotatable about an axis of rotation (5). The lateral magnetic field (8) is produced by a magnet (4) which also produces an axial magnetic field (7). Magnetic field sensor elements have a linear characteristic only over an angular range of up to at most 180.degree.. According to the invention, however, in addition to the field sensor element (1) there is also provided a measuring element (2) which determines the direction of an axial magnetic field (7) also produced by magnet (4) and which traverses the measuring element (2). An evaluation circuit (9) is thereby enabled to determine the angular position of the target object (6) from the sensor signal (U.sub.S) produced by the magnetic field sensor element (1) and the direction signal (U.sub.

Abstract: An angle sensor includes at least two angularly spaced sensor units which measure in a contactless manner and whose sensor voltages are similar but angularly shifted sinusoidal functions (sensor characteristic) of the angle .alpha. to be measured relative to a rotatable element and a processing circuit forms an angle sensor voltage which is a measure of the angle .alpha.. Using limited analog circuitry, a wide angular range is obtained and also a monotonously increasing angle sensor voltage which is dependent as linearly as possible on the angle to be measured, in that the sensor voltages are direct voltages which are constant in time.

Abstract: The invention relates to an arrangement (10) for detecting a moved ferromagnetic element (16) comprising a magnet (11), to which a sensor (14) is assigned on one of its pole faces (12) at a certain distance from the moved element (16). Such arrangements (10) are known, for example, for detecting the speed of a toothed wheel (16). In such known arrangements (10), the positioning of the sensor (14) on the magnet (11) is critical as far as offset voltages in the stationary condition should be avoided in order to obtain a high sensitivity. For an accurate positioning the magnet (11) of such an arrangement (10) has means for producing at least one magnetic imperfection for symmetrization and parallelization of a magnetic field (17) located in the direction of movement (A) of the moved element (16) and of a perpendicular to the pole face (12) for forming a mounting zone (24) free from sensor signal voltage for the sensor (14).

Abstract: An adaptive revolution-measuring apparatus which includes a magnetic revolution sensor and an apparatus for comparing and evaluating the sensor signal of the revolution sensor to generate a digital output signal (U.sub.A) corresponding thereto, which despite large offset voltage tolerances and shifts uniquely identifies and evaluates the periodic sensor signal. The measuring apparatus contains a window comparator (17) with a controllable window as the apparatus for comparing which via at least one logic switching element (20, 21) drives a flip-flop (25) to produce the output signal (U.sub.A). Further apparatus are provided downstream of the window comparator which continuously generate corresponding reference voltages (U.sub.R1, U.sub.R2) for the window comparator as a function of the raised or lowered values of the sensor signal.

Abstract: A phase sensitive output circuit is used at an output of a piezoferroelectric storage element driven by an alternating voltage so that the storage range of the element is practically doubled.

Abstract: For reducing or preventing unwanted variations at adjacent storage electrodes upon polarization or depolarization of one of the storage electrodes on a PXE body a storage electrode terminating impedance is proposed of a special value.