| 摘要 |
<p>A transmitter for transmitting FSK-modulated signals by means of an inductive aerial. With a large frequency deviation, such as with FFSK-modulated signals, and a high transmission rate, which may cause the occurrence of a non-constant envelope electronic equipment arranged in the vicinity is subjected to a greater degree of interference than with a small modulation depth and a low transmission rate. By generating in the transmitter and aerial current whose amplitude changes inversely proportionally to the frequency, tuning is not necessary and still a constant envelope is obtained.</p> |
