Vehicle door handle having a control circuit

A vehicle door handle circuit in a vehicle door handle, configured for coupling with a vehicle-sided control device, the vehicle door handle circuit comprising an antenna circuit for emitting a signal to be sent, a control circuit and at least one actuation sensor, the control circuit being coupled with the actuation sensor for detecting an actuation, the antenna circuit comprising a series resonant circuit having a resonant circuit inductance and a resonant circuit capacitance,

• the vehicle door handle circuit having two contacts for coupling to the vehicle-sided control device via only two connection cables, via which the vehicle door handle circuit can receive a direct-current supply voltage for supplying the control circuit or an alternating-current voltage signal for driving the antenna circuit from the vehicle-sided control device,
• the antenna circuit being coupled between the two contacts,
• the control circuit comprising a first and a second voltage supply junction each coupled to one of the two contacts,
• wherein, for the purpose of using a portion of the alternating-current voltage signal for the voltage supply of the control circuit,
• a series circuit, which comprises a first capacitor and a first rectifier connected in series, is connected between the two contacts and in parallel to the antenna circuit, wherein the first rectifier is connected in the reverse-biased direction with regard to the direct-current supply voltage, and
• a tap of the series circuit, located between the first capacitor and the first rectifier, is coupled with the first voltage supply junction of the control circuit,
• wherein at least one second rectifier is coupled between the tap and the first voltage supply junction and/or between the second voltage supply junction and the node, which connects one of the two contacts to the series circuit on the side of the first rectifier, wherein the second rectifier is coupled to the tap or the node, respectively, in the opposite polarity vis-à-vis the first rectifier and
• wherein, for feeding the direct-current supply voltage of the vehicle-sided control device, a third rectifier is coupled between the contact of the two contacts, which is connected to the series circuit on the side of the first capacitor, and the first voltage supply junction of the control circuit, wherein the third rectifier is connected in the forward-biased direction with regard to the direct-current supply voltage.