| 摘要 |
<P>PROBLEM TO BE SOLVED: To gain a frequency synthesizer that can suppress the output of an unwanted wave components. <P>SOLUTION: An unwanted wave suppressing circuit 10 is synchronized with the clock signal produced from a clock signal source 1; produces a waveform analog signal B<SB>2</SB>, corresponding to an amplitude signal A<SB>2</SB>produced from a digital amplitude data production circuit 2; shifts the analog signal B<SB>2</SB>by a 90° phase amount via the clock frequency f<SB>ck</SB>; and synthesizes the analog signal B<SB>2</SB>, after phase shift with the analog signal B<SB>1</SB>output from MN-DAC3. <P>COPYRIGHT: (C)2010,JPO&INPIT |
