| 摘要 |
<p>A radio transceiver (100) is coupled to a source of a reference waveform (13), and includes transmit mode receive modes. The transceiver (100) comprises a first down mixer (16), a first low pass filter (20) coupled to the first down mixer, and a first selective coupling switch (S1). The first down mixer (16) is coupled to receive an input signal having an input frequency, for mixing the input signal with the reference waveform to produce a first signal. The first signal has a frequency substantially lower than the input frequency. The first low pass filter (20) is coupled to the first down mixer (16) for producing a filtered first signal. The first selective coupling switch (S1) couples the first down mixer (16) and the low pass filter (20) when the radio transceiver (100) is in the receive mode, and decouples the first down mixer (16) and the low pass filter (20) when the radio transceiver (100) is in the transmit mode, thus substantially eliminating transient disturbances.</p> |
