Disclosed is an electronic device. The electronic device includes an input node, an output node, a power node that transfers a voltage of a third level to the output node when a voltage of the input node is a first level, and a capacitor that transfers a change in the voltage of the input node to the output node through a coupling such that a voltage of the output node is adjusted to a fourth level, when the voltage of the input node changes from the first level to a second level.

A buffer circuit includes a power control circuit, an inverting circuit, and a voltage adjustment circuit. The power control circuit is configured to provide voltages based on an input signal and a mode signal, and the inverting circuit is configured to receive and invert the voltages to generate an output signal. The voltage adjustment circuit is configured to adjust voltage levels based on the mode signal and the output signal.

The present disclosure relates to a semiconductor chip having a level shifter with electro-static discharge (ESD) protection circuit and device applied to multiple power supply lines with high and low power input to protect the level shifter from the static ESD stress. More particularly, the present disclosure relates to a feature to protect a semiconductor device in a level shifter from the ESD stress by using ESD stress blocking region adjacent to a gate electrode of the semiconductor device. The ESD stress blocking region increases a gate resistance of the semiconductor device, which results in reducing the ESD stress applied to the semiconductor device.

A system is provided to analyze cross-modulation distortion in audio devices, which may include testing with audio frequencies. One or more distortion signals from the audio device may be measured for an amplitude, phase, and or frequency modulation effect. In another embodiment a musical signal may be used as a test signal. Providing additional test signals to the audio device can induce a time varying cross-modulation distortion signal from an output of the audio device. Also utilizing at least one additional filter, filter bank, demodulator and or frequency converter and or frequency multiplier provides extra examination of distortion. Also frequency and or phase response can be measured with the presence of a de-sensing signal and or another signal that induce near slew rate limiting or near overload condition of the device under test.

In one embodiment, the present invention is directed to a contact hearing system comprising: an ear tip including a transmit coil, wherein the transmit coil is connected to an audio processor, including an H Bridge circuit; a first input to the H Bridge circuit comprising an AND circuit wherein a first input to the AND circuit comprises a carrier signal and a second input to the AND circuit comprises an output of a delta sigma modulation circuit, wherein the delta sigma modulation circuit is a component of the audio processor; and a second input to the H Bridge circuit comprising an NAND circuit wherein a first input to the NAND circuit comprises a carrier signal and a second input to the NAND circuit comprises an output of the delta sigma modulation circuit.

In one embodiment, the present invention is directed to an ear tip having a proximal end and a distal end, the eartip including: a transmit coil, the transmit coil including a core of a ferromagnetic material, the ferromagnetic core having a central channel there through, a distal end of the ferromagnetic core positioned at a first opening in a distal end of the ear tip; a passage extending from an opening at a proximal end of the ear tip to the distal end of the ear tip, the passage ending at a second opening in the distal end of the ear tip, wherein a proximal end of the central channel is connected to the passage.

In embodiments of the invention, the present invention is directed to a contact hearing system, the contact hearing system including: an ear tip, the ear tip including a transmit coil wherein the transmit coil is wound around a core including, at least in part, a ferromagnetic material; and a contact hearing device including a receive coil wherein the receive coil is wound around a core including, at least in part, a non-ferromagnetic material.

In embodiments of the invention, the present invention is directed to a contact hearing system including: a transmit circuit including a transmit coil positioned in an ear tip, THE transmit circuit having a first bandpass characteristic, wherein the transmit circuit is tuned such that a center of the first bandpass characteristic is set at a first frequency; and a receive circuit including a receive coil positioned on a contact hearing device, the receive circuit having a second bandpass characteristic, wherein the receive circuit is tuned such that a center of the second bandpass characteristic differs from the center of the first bandpass characteristic.

In one embodiment, the present invention is directed to a contact hearing system including: an ear tip including a transmit circuit having a first Q value, wherein the ear tip includes a transmit coil wound on a ferrite core; a contact hearing device including a receive circuit having a second Q value, wherein the first Q value is greater than the second Q value; a receive coil positioned on the contact hearing device, wherein the receive coil includes a core of a non-ferromagnetic material.

In embodiments of the invention, the present invention is directed to a contact hearing system including: a transmit coil positioned in an ear tip wherein the transmit coil includes an electrical coil wound on a ferrite core; a receive coil positioned on a contact hearing device wherein the receive coil includes an electrical coil without a core; a load connected to the receive coil; and a demodulation circuit connected to the receive coil and the load wherein the demodulation circuit includes a voltage doubler and a peak detector.