Abstract: An assembly of an amplifier and a power source. The current output of the amplifier, for any load, is the same for the same output voltage, irrespective of the sign of the voltage. This symmetry removes the even portions of the distortion.

Abstract: A method of assembling a transducer assembly comprising a transducer and a conductor element, where one of the transducer and the conductor element includes holes and conducting parts, each conducting part being exposed in or at a hole and the other of the transducer and the conductor element includes elevated, electrically conducting elements. The method includes aligning the conductor element and the transducer so that each of the elevated elements extends into a separate hole of the holes and fixing the transducer to the conductor element by fixing each elevated element to the conducting parts of the pertaining hole.

Abstract: A method of assembling a transducer assembly comprising a transducer and a conductor element, where one of the transducer and the conductor element includes holes and conducting parts, each conducting part being exposed in or at a hole and the other of the transducer and the conductor element includes elevated, electrically conducting elements. The method includes aligning the conductor element and the transducer so that each of the elevated elements extends into a separate hole of the holes and fixing the transducer to the conductor element by fixing each elevated element to the conducting parts of the pertaining hole.

Abstract: A MEMS microphone comprising a MEMS transducer having a back plate and a diaphragm as well as controllable bias voltage generator providing a DC bias voltage between the back plate and the diaphragm. The microphone also has an amplifier with a controllable gain, and a memory for storing information for determining a bias voltage to be provided by the bias voltage generator and the gain of the amplifier.

Abstract: A MEMS microphone comprising a MEMS transducer having a back plate and a diaphragm as well as controllable bias voltage generator providing a DC bias voltage between the back plate and the diaphragm. The microphone also has an amplifier with a controllable gain, and a memory for storing information for determining a bias voltage to be provided by the bias voltage generator and the gain of the amplifier.

Abstract: The present invention relates to miniature transducer assemblies arranged within an assembly housing having a plurality of external terminals on the assembly housing in order for the assembly to be able to receive and transmit electrical signals to and from the assembly, wherein at least one of the plurality of external terminals is adapted to receive and/or transmit at least two electrical signals so as to reduced the number of external terminals on the assembly housing. The principles apply, for example, to miniature microphone or telecoil assemblies having built-in analog-to-digital converters so as to be able to provide a digital output signal according to a sensed acoustic pressure.

Abstract: A microphone assembly comprising; a transducer for receiving acoustic waves through a sound inlet port, and for converting received acoustic waves to analog audio signals, a pre-amplifier having an input and an output terminal, the input terminal being connected to the transducer so as to receive analog audio signals from the transducer, switching means having one or more input terminals, and an output terminal, a first input terminal of the one or more input terminals being connected to the output terminal of the pre-amplifier so as to receive amplified analog audio signals from the pre-amplifier, and an analog-to-digital converter having an input and an input/output terminal, the input terminal being connected to the output terminal of the switching means so as to convert received analog audio signals to digital audio signals. Preferably the switching means is configured so as to be controlled by a characteristic of a received auxiliary analog audio signal, such as its DC level or its AC amplitude level.