| 摘要 |
<p>An AM radio receiver includes an automatic tuning circuit for setting an automatic tuning mode. A radio frequency circuit produces a tuned signal and an untuned signal. A selector receives the tuned signal and untuned signal, and selects the tuned signal when the automatic tuning mode is set, and selects the untuned signal when the automatic tuning mode is not set. An intermediate frequency signal generator produces an intermediate frequency signal based on the selected signal.</p> |
