Data transmission device for hearing aids
First Claim
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1. A hearing aid including a data transmission device for hearing aids, comprising:
- a modulatable oscillator circuit configured for generating an alterable transmission signal;
said oscillator circuit comprising a coil;
said coil is utilized as an antenna for radiating the transmission signal and for receiving a reception signal; and
an actuation circuit having a feed for delivering an adjustable amount of energy into the oscillator circuit exclusively during a negative or positive half-cycle of the oscillation in the oscillator circuit wherein the actuation circuit further comprises a current mirror that is actuated by a comparator circuit that monitors the polarity of the oscillation.
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Abstract
The communication device in a hearing aid needs to be optimized with respect to spatial requirements and power consumption. To this end, provision is made for an inductor in an oscillator circuit to be used simultaneously as an antenna. Besides reducing the number of components, this also reduces the power consumption. Further optimization in terms of energy can be achieved by virtue of a comparator being used to actuate a controllable current source such that energy is fed into the oscillator circuit only during a half-cycle.
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Citations
9 Claims
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1. A hearing aid including a data transmission device for hearing aids, comprising:
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a modulatable oscillator circuit configured for generating an alterable transmission signal; said oscillator circuit comprising a coil; said coil is utilized as an antenna for radiating the transmission signal and for receiving a reception signal; and an actuation circuit having a feed for delivering an adjustable amount of energy into the oscillator circuit exclusively during a negative or positive half-cycle of the oscillation in the oscillator circuit wherein the actuation circuit further comprises a current mirror that is actuated by a comparator circuit that monitors the polarity of the oscillation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification