I am using the inverted GC schematic on OPA541 chip.
Normall the schematic use 10K R in and 220K R feedback which give 22X gain.
But I want to reduce the gain to be around 6-4X, the problem is should I use the higher value R in to be around 47K or lower the value of R feedback to be 50K?
What the difference do they made?
Normall the schematic use 10K R in and 220K R feedback which give 22X gain.
But I want to reduce the gain to be around 6-4X, the problem is should I use the higher value R in to be around 47K or lower the value of R feedback to be 50K?
What the difference do they made?
5150ed said:You mean higher R in add more niose right?
R or the feedback resistor
5150ed said:
How about R in =5.2K and R feedback = 22K, Is this seem better?
Or R in =220 ohms and R feed back = 1K, Is this too low?
How low you can go,depends on the output impedance of the component before the amp
5150ed said:
Yep, I decide to have Tube preamp infront of my gainclone.
Do you know the preamp's output impedance?
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