hey guys i had an idea for a chipamp using that1646 differential driver.
Basically the differential output of the chip feeds directly into +/- of the lm1875, and the gain done by an opamp before the 1646.
There is no feedback from the 1875 to the gain stage, and all 3 chips are powered from the same 15v differential supply.
Would this work?
Basically the differential output of the chip feeds directly into +/- of the lm1875, and the gain done by an opamp before the 1646.
There is no feedback from the 1875 to the gain stage, and all 3 chips are powered from the same 15v differential supply.
Would this work?
You would need feedback around the OPA1646/LM1875 combo and you would need that loop to be stable. You could entertain the thought of configuring the LM1875 as a difference amplifier and driving its differential input with the OPA1646. Close the loop around both for a composite amp.
Stability will be a challenge, as with any composite amp, but it could be a fun project.
Tom
Stability will be a challenge, as with any composite amp, but it could be a fun project.
Tom