Abstract: A driver circuit for driving a resonance circuit is disclosed. The driver circuit includes an input to receive an input signal, an amplifier to amplify the input signal, a pulse generator to generate a pulse train based on a modulation signal, a switch coupled to the pulse generator, a capacitor coupled to the switch in parallel such that when the switch is on, the capacitor is bypassed and a Resistor-Inductor-Capacitor (RLC) tank circuit coupled to the switch and the capacitor such that the capacitor is connected in series to capacitance of the RLC tank circuit.

Abstract: A voltage converter comprises an inductive circuit (L) for storing energy during an inductive magnetizing mode and transferring energy during an inductive demagnetizing mode. In addition the voltage converter comprises at least two non-inverting branches (12,13,14) for providing at least two non-inverted output voltages (Va,Vb,Vc) and an inverting branch (15) for providing an inverted output voltage. The inverting (15) and non-inverting (12,13,14) branches being parallely coupled to an output (10) of the inductive circuit (L). The inductive circuit being arranged to transfer energy to the inverting branch (15) and to one of the at least two non-inverting branches (12,13,14). Through this, the inverted voltage (Vinv) and the corresponding non-inverted output voltage (Va,Vb,Vc) of the one of the at least two non-inverting branches (12,13,14) are having an opposite polarity and a substantially equal magnitude.

Abstract: The present invention relates to a boost converter (100) which can operate both in a capacitive and in an inductive mode. In the capacitive mode the converter operates as a charge pump circuit by making use of a set of switches (S1,S2,S3,S4) and a set of capacitors (110,112). In the inductive mode the converter operates as a boost circuit and uses a sub-set of the switches (S2,S4) and an inductor. The mode is selected by means of a selection terminal (Vin) which is also used in the capacitive mode for coupling of a battery (108) to the boost converter (100).