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求一款能够产生正交脉冲的芯片

Other Parts Discussed in Thread: DAC5688
 大神们好,想咨询一下,有没有这样的一款芯片,能够输出至少15kHz的矩形波信号,波形的占空比可以设置,频率可以设置,输出幅值为3-5V都行。要求能够输出两路矩形波,且这两路是正交(相差90度),或者这两路信号直接的相位可以调节。。