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SheldonP
采用芯片手册上的图29的电路。我感觉7脚应该是要输出一个跟载波频率一样的矩形波,但是只有工作在频率低的时候7脚才是矩形波,增大频率后波形峰值就减小失真。以上是我在使用时的现象。 ad630工作于调制器时它的7脚应该是什么波形?还有此时的载波频率可以达到多少?希望得到你们的解答。谢谢。   载波300HZ时,7脚的波形:   载波600HZ时,7脚的波形: 载波2k时,7脚的波形: 载波20K时,7脚的波形:  
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albert17
I'm trying to use the DRG mode in the AD9910 DDS to generate amplitude ramps. So far it works well and, as expected from the datasheet, all ramps start at the lower limit. I would like to know if there's some way to start these ramps at the largest amplitude (without going first through the smallest amplitude, i.e., a falling amplitude ramp).
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