[sdiy] linearize OTA for VCF?

[Grant Richter]

If you look at the LM13600/13700 datasheets, the filter designs are simply
CA3080 designs transferred to the different chip. Using the input diodes
means dropping the whole circuits input impedance to 10K, which can affect
other parts of the circuit. It's a pain.


>> 
>> Looking through my vcf schematic collection, I notice that none of the
>> designs use the linearizing diodes on the OTA inputs. Does anyone have any
>> comments on the pros and cons of using these, and has anyone actually
>> incorporated them in a design?
>> 
>> Best regards,
>> 
>> Ian
>>