| 摘要 |
PURPOSE:To make the frequency characteristic of a transmission level flat by correcting a transmission output voltage with transmission voltage sensitivity of a broad band receiver. CONSTITUTION:A class B transmitter 1 supplies a transmission output voltage Vout having a frequency set in the operating frequency range of a broad band transmitter-receiver 7 to the broad band transmitter-receiver 7. A transmission voltage sensitivity correction circuit 3 sends a correction transmission signal Vin' corrected so as to make the transmission voltage sensitivity constant effectively with a transmission frequency (f) offered from a transmission frequency detection circuit 3 and the frequency characteristic of the transmission voltage sensitivity of the broad band transmitter-receiver 7 measured in advance to a power amplifier 5. Thus, the frequency characteristic of the transmission level of the broad band transmitter-receiver 7 is totally made flat. |
