[sdiy] BODE Frequency Shifter

atsushi maeda shine32 at kr.tcp-ip.or.jp
Wed Oct 31 23:07:31 CET 2018


Thanks so much, Dave


I have only one measuring instrument to measure the phase difference.
That is an oscilloscope.
When measured, it was a phase difference of 45 degrees except for 40 Hz.


On 2018/10/31 23:02, Dave wrote:
>
> On October 30, 2018 3:45:25 AM PDT, atsushi maeda <shine32 at kr.tcp-ip.or.jp> wrote:
>
>> The current problem occurred when adjusting DOME Filter.
>> It may be adjusted so as to have a phase difference of 90 degrees at 40
>>
>> Hz, 170 Hz, 725 Hz, 3080 Hz, 13090 Hz, but if I adjusted it to 90
>> degrees phase difference at 13090 Hz, the phase difference will be 90
>> degrees at other frequencies It will not be.
>> No matter how many times you try to adjust it, it will not change.
>> Is my understanding wrong?
> Please post your measurements.  How large are the errors?
>
> -Dave
>


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