| 摘要 |
In an AM receiver, an intermediate frequency amplifier stage is excluded, but a harmonic oscillation circuit is provided for producing a signal synchronous with an amplitude-modulated signal applied thereto, so that the output of the harmonic oscillation circuit is utilized for the AM demodulation of the received signal, whereby image-frequency components as in the superheterodyne system are not detected and only the tuned-frequency component is detected, thus preventing the occurrence of radio interference.
|
