Hello,
I am building Aleph5 and I want to add more output mosfet without changing of the bias per device. So, I will get more total bias which could be better in sonic performance.
My curious is, should I just put more mosfet in parallel (with source and gate resistors) and don't have to adjust any surrounding component? Or do I have to change the output resistors or source resistors value?
Thank you in advance for every answer.
I am building Aleph5 and I want to add more output mosfet without changing of the bias per device. So, I will get more total bias which could be better in sonic performance.
My curious is, should I just put more mosfet in parallel (with source and gate resistors) and don't have to adjust any surrounding component? Or do I have to change the output resistors or source resistors value?
Thank you in advance for every answer.
be specific about number of outputs , then I can be specific about output resistors
in fact , just take it's value (sense resistor group) as all source resistors in parallel
in fact , just take it's value (sense resistor group) as all source resistors in parallel
I plan to use 10 devices per channel (5 for current source and 5 for gain)that will give me around 3 A bias?
as is , with 1R source resistors , that will be 0A5 per vertical pair
so original, having 3 verticals , that is 1A5 Iq
with your 5 verticals , that will be 2A5
with 5 verticals, each source resistor 1R, you need 71mOhm in sense group , to stay in same guidelines
so original, having 3 verticals , that is 1A5 Iq
with your 5 verticals , that will be 2A5
with 5 verticals, each source resistor 1R, you need 71mOhm in sense group , to stay in same guidelines
What if I use the same value for source resistors and output resistors. What gonna happen?
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as far as I'm concerned , you can use 100R resistors in sense group , but parallel them just enough to get 71mOhm
What if I use the same value? For source resistors. And if I use same value and number of output resistors?
Could I put it like this?
An externally hosted image should be here but it was not working when we last tested it.
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Could you explain more, How did you get 71mOhm from? Please explain a bit how to calculate this number.
Sorry, I am confusing.
just find on internet how to calculate value of paralleled resistors
as on picture (4 paralleled 0R47) there is 0R1175
btw. that picture is wrong - 0R1175 is adequate for 3 vertical pairs , as in original Aleph 5
with 5 vertical pairs , as I said , there must be 71mOhm
as on picture (4 paralleled 0R47) there is 0R1175
btw. that picture is wrong - 0R1175 is adequate for 3 vertical pairs , as in original Aleph 5
with 5 vertical pairs , as I said , there must be 71mOhm
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