System and method for transmitting a radio frequency signal through a speaker coil
AssigneeInfineon Technologies AG
InventorsNikolay Ilkov, Winfried Bakalski
Life of this patent
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Abstract
In accordance with an embodiment, a system has an audio amplifier configured to be coupled to a speaker coil port via a parallel resonant circuit, and a radio frequency (RF) amplifier configured to transmit a RF signal at a first RF transmission frequency. The speaker coil port is configured to be coupled to a speaker coil, and the parallel resonant circuit has a resonance frequency of about the first RF transmission frequency.
Claims28
A system comprising:
- an audio amplifier configured to be coupled to a speaker coil port via a parallel resonant circuit, the parallel resonant circuit having a resonance frequency of about a first radio frequency (RF) transmission frequency, wherein the speaker coil port is configured to be coupled to a speaker coil;
- and
- a RF amplifier configured to transmit a RF signal at the first RF transmission frequency.
A circuit comprising:
- an audio amplifier configured to be coupled to a speaker coil port via an output port of a transformer coupled in series with the audio amplifier, wherein the speaker coil port is configured to be coupled to a speaker coil;
- and
- a RF amplifier configured to transmit a RF signal coupled to an input port of the transformer.
A circuit comprising:
- a RF amplifier coupled in parallel with a speaker coil port, the speaker coil port configured to be coupled to a speaker coil;
- an adjustable parallel resonant circuit having a first port coupled the speaker coil port;
- an audio amplifier coupled to a second port of the adjustable parallel resonant circuit.
A method of operating a speaker coil coupled in parallel with a RF amplifier and coupled to an audio amplifier via an adjustable parallel resonant circuit, the method comprising:
- operating the speaker coil in an audio mode comprising activating the audio amplifier and deactivating the RF amplifier;
- and
- operating the speaker coil in a RF mode comprising transmitting a RF signal with the RF amplifier, the RF signal having a frequency near a resonance frequency of the adjustable parallel resonant circuit.
Dependencies are inferred from the claim text.