Patent ID: 6768296
Filing Date: 2004-07-27
Classification: H03K

Abstract:
A circuit arrangement for generating square pulses as a function of field intensity of a magnetic field, said circuit arrangement comprisingan edge-triggered flip-flop (1) having a trigger input; at least one comparator (2) having a signal input (2a) and an output connected to the trigger input of the flip-flop (1); a bridge comprising four bridge segments connected in series with each other and a transverse branch connected across said bridge between said bridge segments, wherein respective bridge segments comprise corresponding switches (7, 8, 9, 10), said transverse branch comprises an energy-storing element (3) alternately charged as a function of switching state of the edge-triggered flip-flop (1) and said energy-storing element (3) consists of a magnetic field probe (12) for detecting a magnetic field, which consists of an inductive resistor; and at least one switching threshold resistor (4) connected in series with said energy-storing element (3), which is connected with said signal input (2a) of said at least one comparator (2), so that a voltage is applied to said signal input due to current flowing through the energy-storing element (3); and wherein pairs (7, 10 or 8; 9) of said switches on opposite sides of the transverse branch are connected by said flip-flop (1) in crossover fashion, so that said current flowing in said energy-storing element (3) is reversible, and wherein a junction point of the bridge to the at least one switching threshold resistor (4) is connected to said signal input (2a) of the at least one comparator (2).