Ultrasonic transmission and reception device

A driver assistance system, comprising:

• an ultrasonic transmission and reception device that includes:
• a transmission circuit for generating a transmission signal at signal outputs;
• an ultrasonic transducer for converting electrical signals into sound signals and sound signals into electrical signals;
• a transformer including a primary side connected to the signal outputs of the transmission circuit and a secondary side connected to the ultrasonic transducer;
• and
• a reception circuit for processing a received signal applied at a reception input of the reception circuit, wherein:
• the reception input is connected to the transformer via an additional winding tap of the transformer, and
• the additional winding tap is incorporated into the transformer so that a voltage amplitude of a transformed transmission signal at the reception input of the reception circuit is boosted with a lower gain factor than a transformed transmission signal which excites the ultrasonic transducer;
• wherein the primary side of the transformer includes a primary coil including a first primary winding segment having at least n windings,
• wherein one of the following is satisfied:
• (i) the secondary side of the transformer includes a secondary coil having y windings, which includes a partial winding segment having z windings, (ii) the secondary side of the transformer includes a secondary coil having y windings, which includes a partial winding segment having z windings, and (iii) the transformer includes a tertiary coil having z windings, and
• wherein a ratio between the numbers of windings z and n is such that a maximum amplitude of a transmission signal, which is transmitted directly via the transformer to the reception circuit, does not exceed a proof voltage of the reception circuit.

A vehicle, comprising:

• a driver assistance system, comprising:
• an ultrasonic transmission and reception device that includes:
• a transmission circuit for generating a transmission signal at signal outputs;
• an ultrasonic transducer for converting electrical signals into sound signals and sound signals into electrical signals;
• a transformer including a primary side connected to the signal outputs of the transmission circuit and a secondary side connected to the ultrasonic transducer;
• and
• a reception circuit for processing a received signal applied at a reception input of the reception circuit, wherein:
• the reception input is connected to the transformer via an additional winding tap of the transformer, and
• the additional winding tap is incorporated into the transformer so that a voltage amplitude of a transformed transmission signal at the reception input of the reception circuit is boosted with a lower gain factor than a transformed transmission signal which excites the ultrasonic transducer;
• wherein the primary side of the transformer includes a primary coil including a first primary winding segment having at least n windings,
• wherein one of the following is satisfied:
• (i) the secondary side of the transformer includes a secondary coil having y windings, which includes a partial winding segment having z windings, (ii) the secondary side of the transformer includes a secondary coil having y windings, which includes a partial winding segment having z windings, and (iii) the transformer includes a tertiary coil having z windings, and
• wherein a ratio between the numbers of windings z and n is such that a maximum amplitude of a transmission signal, which is transmitted directly via the transformer to the reception circuit, does not exceed a proof voltage of the reception circuit.