Braun Gmbh

Joachim Lepper

Philipp Jung

Jan Christian Langsdorf

Thomas Hohmann

Heiko Bornheimer

Lutz Ronald Herzberg

Armin Schwarz-Hartmann

Torsten Klemm

Peter Trawinski

Joern Utsch

Michael Stolper

Ingo Vetter

Matthias Schiebahn

Herbert Petzold

Florian Baier

Ralf Gorlach

Ralf Görlach

The present invention is concerned with an electronic circuit that is connectable to a voltage source and a load. The circuit comprises a controllable load switch element that is arranged so that a supply voltage provided by the voltage source in a connected state is provided to the load when the load switch element is switched on and is not provided to the load when the load switch element is switched off and a voltage detection circuitry that in the connected state is coupled to the load so as to be energized by the voltage applied to the load. The circuit further comprises a switch-on circuitry that is coupled to the load switch element and is arranged to switch on the load switch element for a determined period of time after a switch arranged between the switch-on circuitry and the voltage source is closed. The proposed circuit allows for using a simple voltage detection circuit that is energized by the voltage to be measured by providing the switch-on circuitry.

Electronic circuit arranged to control voltage applied to a load

A circuit arrangement for the inductive transfer of energy is disclosed. The circuit arrangement includes an oscillator; and a device for detecting the load of the oscillator and for setting the circuit arrangement into one of multiple operating states depending on the detected load. The device determines the load of the oscillator using an electrical variable occurring in the oscillator.

Circuit arrangement for inductive energy transfer

A method and a circuit arrangement for the inductive transfer of energy with an oscillator and a device to detect the inductive load of the oscillator, and to modify a damping element in the oscillator depending on the load of said oscillator.

Circuit arrangement and method for inductive energy transfer

A circuit arrangement for the inductive transfer of energy is disclosed. The circuit arrangement includes an oscillator; a power supply for supplying the oscillator with energy and having a complex input resistance; and a device for detecting the inductive load of the oscillator and for modifying the complex input resistance of the power supply depending on the load of the oscillator.

An electric toothbrush is disclosed. The toothbrush includes a housing; a brush; an electric motor for driving the brush; a power supply for providing the electric power required for operation of the toothbrush; a switch mechanism for turning the drive on and off; and an electronic circuit for adjusting the effective voltage (U) applied to the electric motor. In operation, a voltage supplied by the power supply declines with the discharge status of the power supply from a high-voltage range to a low-voltage range. During operation of the toothbrush in the high-voltage range (H), the effective voltage (U) applied to the electric motor is lowered to a level at which the electric motor has reached a rotational speed corresponding essentially to the rotational speed of the electric motor in the medium-voltage range.

Electric toothbrush

An electronic circuit for an electric appliance. In one embodiment, there is provided an electronic circuit for a battery-operated electric appliance, which can be inductively fed by an external electric power source, comprising a charging circuit for charging an accumulator (A), which encompasses a charging coil (L) and a diode (D), wherein the accumulator (A) is connected in series to the diode (D) and the charging coil (L), a light emitting diode (LED) as display for the charging process and/or charging status of the accumulator (A), wherein an end of the charging coil (L) is connected to the cathode of the diode (D) and the anode of the light emitting diode (LED) and the negative pole of the accumulator (A) is connected to the anode of the diode (D).

Electronic circuit for a small electric appliance

A battery contact spring with a spring body manufactured as a flexible wire part is disclosed. The battery contact spring has a first contact head section for contacting a first battery; a second contact head section for contacting a second battery, and at least one first spiral spring section that extends between a spring foot area and the first contact head section and which flexibly supports the first contact head section. The spring body is designed in such a way that a coil end of the first spiral spring section opposite the spring foot area crosses over into the first contact head section and attached to this first head section is a connection bridge that crosses over into the second contact head section.

Growing community of inventors

Usingen, Germany

Joachim Lepper