| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a phase modulating circuit capable of performing phase-modulation without delay and distortion. Ž<P>SOLUTION: The phase modulating circuit comprises: an amplifier 1 outputting two mutually-inverted baseband signals Xa, Xb from a baseband signal X; a splitter 2 outputting two mutually-reversed-phase carriers Aa, Ab from a carrier A; a first limiter amplifier 3 for enabling/disabling the carrier Aa based on its gain being controlled by the baseband signal Xa; a second limiter amplifier 4 for enabling/disabling the carrier Ab based on its gain being controlled by the baseband signal Xb; and a combination unit 5 for combining a signal outputted from the first limiter amplifier 3 with a signal outputted from the second limiter amplifier 4. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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