Driving circuit with several sensors
AssigneeDeutsche Thomson-Brandt GmbH
InventorsGunter Gleim, Friedrich Heizmann, Bernd Rekia
Life of this patent
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Abstract
Control circuit for producing output voltages from a plurality of sensor signals, wherein each of the sensor signals are identical and mutually phase shifted. The control circuit comprises a plurality of comparators for producing the output voltages, wherein each comparator is respectively supplied with one of the sensor signals and with an amount of hysteresis which depends on the amplitude of one or more of the respective other sensor signals. The control circuit further comprises electronic circuitry for deriving the respective amount of comparator hysteresis for each of the comparators from the amplitude of one or more of the respective other sensor signals.
Claims8
Control circuit for producing output voltages (UA, UB, UC) from a plurality of sensor signals (a, b, c) each signal in said plurality being identical and mutually phase shifted, said circuit comprising:
- a plurality of comparators (A, B, C) for producing said output voltages (UA, UB, UC) wherein each comparator of said plurality of comparators is respectively supplied with one of said plurality of sensor signals (a, b, c) and with an amount of hysteresis which depends on the amplitude of one or more of the respective other sensor signals;
- circuit means for deriving the respective amount of comparator-hysteresis for each said comparator from the amplitude of one of more of the respective other sensor signals (a, b, c);
- and
- a switch (Sa. Sb, Sc) uniquely associated with each comparator, which is operated by the output voltage (UA, UB, UC) of the comparator (A, B, C), wherein said switch is located between the output of an OR stage and an associated input of the comparator (A, B, C).
Control circuit for producing output signals (h, l, k) from pairs of antiphase signals (V+, V-) each said pair being identical and mutually phase shifted, said antiphase signals generated in pairs by a plurality of sensors (H1, H2, H3) comprising:
- comparators (K1, K2, K3) for producing said output signals (h, l, k) whereby an inverting (-) and a noninverting (+) input of each comparator (K1, K2, K3) is supplied with one pair of antiphase sensor signals (V+, V-) as well as with one sensor signal of the respective other pairs of antiphase sensor signals (V+, V-);
- and
- means (L1, L2, L3) for connecting the inverting (-) and the noninverting (+) input of each comparator (K1, K2, K3) with outputs (d, e, f) of the sensors (H1, H2, H3) which outputs (d, e, f) are constituted by connecting one output of each sensor (H1, H2, H3 with one output of another sensor (H1, H2, H3).
Dependencies are inferred from the claim text.