Patent ID: 6687490
Filing Date: 2004-02-03
Classification: H04B

Abstract:
A transmission apparatus for a mobile terminal, comprising:an automatic gain control (AGC) amplifier for AGC-amplifying an input baseband signal; an attenuator for attenuating an output signal of the AGC amplifier; a multiplier for multiplying an output signal of the attenuator by a carrier frequency signal to convert the signal into a radio frequency (RF) signal; a first filter for filtering an output signal of the multiplier; a drive amplifier for amplifying an output signal of the first filter; a second filter for filtering an output signal of the drive amplifier; a power amplifier for amplifying an output signal of the second filter; and an antenna; wherein when output power of the mobile terminal is lower than a predetermined maximum output power of the AGC amplifier, the output signal of the AGC amplifier is transmitted through the multiplier, the first filter and the antenna, without being transmitted through the attenuator, the drive amplifier, the second filter and the power amplifier.