| 摘要 |
An improved synchronous tracking AM receiver having low power requirements and a small size. The synchronous tracking AM receiver provides signal tracking capability and sensitivity approaching a conventional superhetrodyne receiver. The synchronous tracking AM receiver includes an RF amplifier synchronous input section which couples input signals to a synchronization filter circuit, including a modified Colpitts oscillator. The Colpitts oscillator recycles the signal to generate a high Q output signal. The output signal of the synchronization circuit is coupled to a low pass filter, then amplified by a low frequency amplifier and triggered to produce a digital output signal.
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