Circuit and a receiver comprising the circuit
First Claim
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1. A method of operating a sound generator, the method comprising the steps of:
- A) receiving an audio signal,B) receiving a supply voltage,C) if the supply voltage does not exceed a threshold voltage, feeding the received audio signal to the sound generator, the received audio signal having a first signal strength,D) if the supply voltage exceeds the threshold voltage;
a) feeding the supplied voltage to an amplifier,b) feeding the audio signal to the amplifier, andc) causing the amplified audio signal to be fed to the sound generator, the amplified audio signal having a second signal strength exceeding the first signal strength,where step A) comprises receiving the audio signal on a first and a second input terminal of a circuit also including;
a first and a second output terminal, the first and second output terminals connected to the sound generator, anda first and a second switch,where step B) comprises receiving the supply voltage from a power supply,where step C) comprises;
the first switch connecting the first input terminal to the first output terminal, andthe second switch connecting the second input terminal to the second output terminal, andwhere step D) comprises;
the first switch connecting the first input terminal to an input of a first amplifier or an output of the first amplifier to the first output terminal, andthe second switch connecting the second input terminal to an input of a second amplifier or an output of the second amplifier to the second output terminal.
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Abstract
A circuit and a receiver comprising the circuit, the circuit is able to either feed a received signal directly to the receiver coil or amplify the signal before transmission to the coil. The circuit receives a supply power and amplifies the input signal if the supply power exceeds a threshold value.
114 Citations
11 Claims
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1. A method of operating a sound generator, the method comprising the steps of:
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A) receiving an audio signal, B) receiving a supply voltage, C) if the supply voltage does not exceed a threshold voltage, feeding the received audio signal to the sound generator, the received audio signal having a first signal strength, D) if the supply voltage exceeds the threshold voltage; a) feeding the supplied voltage to an amplifier, b) feeding the audio signal to the amplifier, and c) causing the amplified audio signal to be fed to the sound generator, the amplified audio signal having a second signal strength exceeding the first signal strength, where step A) comprises receiving the audio signal on a first and a second input terminal of a circuit also including; a first and a second output terminal, the first and second output terminals connected to the sound generator, and a first and a second switch, where step B) comprises receiving the supply voltage from a power supply, where step C) comprises; the first switch connecting the first input terminal to the first output terminal, and the second switch connecting the second input terminal to the second output terminal, and where step D) comprises; the first switch connecting the first input terminal to an input of a first amplifier or an output of the first amplifier to the first output terminal, and the second switch connecting the second input terminal to an input of a second amplifier or an output of the second amplifier to the second output terminal.
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2. An assembly of a sound generator and a circuit, the sound generator comprising a coil having a first and a second coil terminal,
the circuit comprising: -
a first and a second input terminal, a first and a second output terminal, the first output terminal connected to the first coil terminal and the second output terminal connected to the second coil terminal, a first and a second switch, the first switch being configured to either make a first connection or a second connection, the first connection connecting the first input terminal to an input of a first amplifier or to an output of the first amplifier to the first output terminal and the second connection connecting the first input terminal to the first output terminal, and the second switch being adapted to either make a third connection or a fourth connection; the third connection connecting the second input terminal to an input of a second amplifier or to an output of the second amplifier to the second output terminal, when the first switch either connects the first input terminal to the input of the first amplifier or the output of the first amplifier to the first output terminal, and the fourth connection connecting the second input terminal to the second output terminal, when the first switch connects the first input terminal to the first output terminal. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification