| 摘要 |
PROBLEM TO BE SOLVED: To provide an EER (Envelop Elimination Restoration) system used as a small delay adjusting circuit with a low cost by devising the delay adjusting circuit which performs the delay adjusting of a phase signal amplifying system and an amplitude signal amplifying system. SOLUTION: An input signal is distributed by a coupler 2 to the path of the amplitude signal amplifying system and the path of the phase signal amplifying system, the amplitude signal is taken out in an amplitude signal detection circuit 3, voltage amplified by an amplitude signal amplifier 4, and supplied as the voltage source of a phase signal amplifier 7. On the other hand, a phase signal is formed by a first saturation amplifier 5 of a high efficiency, and inputted into a delay adjusting circuit 6. The delay adjusting circuit 6 can arrange properly the delay time of the phase signal and the amplitude signal to amplify the phase signal by a second saturation amplifier 6b while adjusting the input level of the phase signal by a variable attenuator 6a. The phase signal amplifier 7 recombines the amplitude signal and the phase signal by performing the amplification of the phase signal by the power source supplied from the amplitude signal amplifier 4, and outputs a high frequency modulation signal. COPYRIGHT: (C)2006,JPO&NCIPI
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