Patent ID: 6934565

Claim:
A mobile terminal, comprising: a control unit for providing an operation mode control signal; a Multi-Function Device (MFD) for performing at least one function in response to the operation mode control signal; and an amplifying unit in communication with the control unit for generating a drive signal with an input signal in response to the operation mode control signal, the amplifying unit comprising: an amplifier receiving the input signal, a filter unit connected to the amplifier for varying frequency of the input signal according to the operation mode control signal, the filter unit comprising a first plurality of filters connected to an input of the amplifier and a second plurality of filters connected to the input and an output of the amplifier, and a switching unit for selecting one of a plurality of frequency values of the filter unit in response to the operation mode control signal, wherein the input signal is filtered in at least one of gain and frequency to produce the drive signal in response to the operation mode of the mobile terminal.