●●● ●●●● ●●●● 3.Direct Conversion Receiver ●●● ●●●●● 1●●● ●●色 LNA baseband ● fRF fIF=0 Amp Demod fRF Lo Homodyne receiver Characteristic: fLo=fRF 1 For AM reception,the received baseband signal would not require any further detection. 对调幅接收，接收到的基带信号不需要任何检测。 2Selectivity can be controlled with a simple low-pass baseband filter.选择性可以用一个简单的低通基带滤波器来控制。 3 Gain may be spread through the RF and base band stages. 增益可以在射频和基带级之间分配。 103.Direct Conversion Receiver ① For AM reception, the received baseband signal would not require any further detection. 对调幅接收，接收到的基带信号不需要任何检测。 ②Selectivity can be controlled with a simple low-pass baseband filter.选择性可以用一个简单的低通基带滤波器来控制。 ③ Gain may be spread through the RF and base band stages. 增益可以在射频和基带级之间分配。 Characteristic: Homodyne receiver 10