Hi Guys,
Good day. We need your help to check the of the TL441 log amp of our customer.
When they adjust the R10 Attenuator it appears to change the gain on both outputs of pins 5 and 11. They assumed that the input on pin 7 would only control the output on pin 5 as well as the input on pin 4 would only change the out put on pin 11. Is there anything changes to the schematic that can be made to eliminate this inter action between the 2 inputs? If they set the input gain correctly on pin 4 that works very well and the pin 12 and pin 9 inputs and out put work very well. It is just the inter-action between the adjust of gain with the R10 attenuator effecting the out put gain on both pin 5 and pin 11.
If you need any information please let us know. We are looking forward to your response.
Daughter Board Logamp Schematic
Best regards,
Jonathan