Apparatus and method for noise reduction
OwnerInaki Eizmendiinventor
Life of this patent
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Abstract
A method and apparatus for noise cancellation in a communication device is disclosed. The method utilizes power supplied from a battery to a buzzer circuit and a plurality of analog impedance elements to generate an audible output which is applied to the circuit to cancel noise. The noise results from a non-constant driving current. The acoustic output is opposite but equal in magnitude to the noise. In an alternative, an algorithm may be programmed into a power management application specific integrated circuit (ASIC) to cancel the noise.
Claims10
A method of reducing noise in a communication device comprising the steps of:
- generating an acoustic output in a buzzer circuit;
- and
- applying said generated output to the communication device, wherein said generated output is opposite to the noise generated in the communication device and equal in magnitude, the noise resulting from a non-constant current.
A method of reducing noise in a communication device comprising the step of:
- generating an acoustic output in a buzzer circuit;
- and
- applying said generated output to the communication device, wherein said generated output is opposite to the noise generated in the communication device and equal in magnitude, the noise resulting from a non-constant current and said acoustic output is generated from an analog circuit.
The method of claim 6, wherein said analog circuit comprises a voltage source and a plurality of impedance components.
A method of reducing noise in a communication device comprising the steps of:
- generating an acoustic output in a buzzer circuit;
- and
- applying said generated output to the communication device, wherein said generated output is opposite to the noise generated in the communication device and equal in magnitude, the noise resulting from a non-constant current and said acoustic output is generated from an algorithm programmed into a power management application specific integrated circuit (ASIC).
Dependencies are inferred from the claim text.