[sdiy] An Improved Sine Shaper Circuit

Michael E Caloroso mec.forumreader at gmail.com
Fri Apr 17 06:53:32 CEST 2020


Beta of 0.710 is awful darn close to the reciprocal of the square root
of 2 (0.707).

MC

On 4/17/20, Ben Bradley <ben.pi.bradley at gmail.com> wrote:
> That's a fascinating idea and good work, an improvement over a common
> sine shaper I first saw decades ago,
> First I have an observation of a 'slight' error. The + and - inputs of
> the first two TL074 sections appear to be swapped.
>
> Next, may I post this elsewhere, specifically on diyaudio.com? They
> have a perennial interest in low-distortion sine wave generation,
> generally lower distortion than this gives, but some there may find
> this useful.
>
> On Thu, Apr 16, 2020 at 7:20 PM Donald Tillman <don at till.com> wrote:
>>
>> Hey folks,
>>
>> I came up with a new sine shaper circuit.  It's a weird variation on old
>> sine shaper circuit.  And it has an order of magnitude more accuracy.
>>
>> I've written it up here:
>>
>>     An Improved Sine Shaper Circuit
>>     http://till.com/articles/sineshaper/
>>
>> Check it out and tell me what you think...
>>
>>   -- Don
>> --
>> Donald Tillman, Palo Alto, California
>> http://www.till.com
>>
>>
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