Hearing device comprising switched capacitor DC-DC converter with low electromagnetic emission
AssigneeGN Hearing A/S
InventorsDennis Øland Larsen, Ivan Riis Nielsen
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Abstract
The present disclosure relates to a head-wearable hearing device which comprises a magnetic inductance antenna having a predetermined resonance period for receipt of wireless data signals and a switched capacitor DC-DC converter configured for converting a DC input voltage into a higher or lower DC output voltage in accordance with a clock signal. The charge pump circuit is configured to charge an output capacitor by output current pulses where the output current pulses at least comprise first and second consecutive output current pulses having a mutual pulse delay corresponding to substantially one-half of the predetermined resonance period of the magnetic inductance antenna.
Claims23
A head-wearable hearing device comprising:
- a magnetic inductance antenna for receipt of wireless data signals;
- and
- a switched capacitor DC-DC converter configured to convert a DC input voltage into a higher or lower DC output voltage, the switched capacitor DC-DC converter comprising a charge pump circuit configured to charge an output capacitor by output current pulses;
- wherein the output current pulses at least comprise first and second output current pulses with a mutual pulse delay corresponding to substantially one-half of a resonance period of the magnetic inductance antenna.
A method performed by a head-wearable hearing device having a magnetic inductance antenna and a switched capacitor DC-DC converter, the method comprising:
- generating a clock signal;
- applying the clock signal to the switched capacitor DC-DC converter to convert a DC input voltage into a higher or lower DC output voltage at an output capacitor;
- supplying output current pulses into the output capacitor for charging the output capacitor;
- and
- setting a time delay between at least first and second output current pulses of the output current pulses equal to substantially one-half of a resonance period of the magnetic inductance antenna.
Dependencies are inferred from the claim text.