| 摘要 |
<p>An amplitude modulation receiver including an antenna (10) for receiving a signal (1) and an input filter (12) connected to the antenna. A variable gain amplifier (16) is connected to the input filter and is responsive to a gain control signal. An A/D converter is connected to the variable gain amplifier and is responsive to a sampling signal and provides a sampled digital signal. A D/A converter (22) receives a demodulated signal and provides an analog output signal. A controller (20) receives and demodulates the sampled digital signal from the A/D converter, generates the gain control signal for the variable gain amplifier, generates the sampling signal for the A/D converter, and provides the demodulated signal to the D/A converter. The demodulation and generation of the gain control signal and the sampling signal are performed in software.</p> |
