Sony Ericsson Mobile Communications Ab

Sony Corporation

Sony Mobile Communications Inc.

Dalloz Safety Ab

Peter Körner

Magnus Birch

Kaj Ullén

Kiril Trajkovski

A method for reducing a disturbance on a signal path is provided. The disturbance is caused by a capacitance ()of a semiconductor switch (-) of an integrated circuit (). The semiconductor switch (-) switches the signal path. The capacitance () acts between the semiconductor switch (-) and a power supply terminal of the integrated circuit (). According to the method, the power supply terminal of the integrated circuit () is coupled via an impedance () to a power supply ().

Reducing a disturbance on a signal path of a semiconductor switch

A biasing arrangement for an electronic apparatus having an input device connected by wires is disclosed. The biasing arrangement comprises a bias signal generator arranged to provide a bias voltage and a reference voltage; a flying capacitor circuitry having a first set of switches connected to said bias signal generator to selectively connecting and disconnecting the bias voltage and reference voltage, respectively, over a capacitor of the flying capacitor circuitry, and the flying capacitor circuitry further having a second set of switches to selectively connecting and disconnecting the voltage over the capacitor to an output of the flying capacitor circuitry, wherein the first and second sets of switches are not both in a connecting state at any time; and a wired connection between output of the flying capacitor circuitry and the input device of the apparatus. An electronic apparatus, a biasing method, and a computer program are also disclosed.

Biasing arrangement, electronic apparatus, biasing method, and computer program

A circuit arrangement for providing an analog signal is disclosed. The circuit arrangement comprises a biasing resistor; an analog input arrangement; and a signal output, wherein the biasing resistor and the analog input arrangement are connected in series between a supply voltage and a reference voltage, and the signal output is connected such that the alternating voltage over the biasing resistor is provided as an output signal. An electronic apparatus comprising such a circuit arrangement is also disclosed.

Circuit arrangement for providing an analog signal, and electronic apparatus

A microphone circuit with low distortion and having the capability of an electronic volume control. The circuit includes a capacitor microphone cap provided with a field effect transistor at the output end and a capacitor connected to the output end of the microphone cap. A resistance for supplying a driver voltage to the microphone circuit is connected to a connecting point between the microphone cap and the capacitor. Preferably a transistor adapted to generate a driver voltage for the microphone circuit or an electronic valve is connected between the microphone cap and the connecting point. The emitter of the transistor is then connected to the collector of the field effect transistor and the collector of the transistor is connected to the connecting point.

Growing community of inventors

Lund, Sweden

Peter Körner