| 摘要 |
The present invention provides a transmitting circuit that improves the SN ratio in a higher output power and the CN ratio in an intermediate to lower output power, and makes linear the characteristic of the attenuation gain. In this transmitting circuit, the intermediate frequency amplifier, high frequency amplifier, and driver amplifier are configured using variable gain amplifiers. And, the gains of the intermediate frequency amplifier, high frequency amplifier, and driver amplifier are designed to be varied by the automatic gain control voltage.
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