[sergey23 0]

Hello ,I used a method shown in the circuit below to bias Vg1 input of PMA5-83-2W link below.
I assumed my Vg1 input is high Z so 1 put 1Mohm resistor as the load for the circuit you helped me to build.
Is it a correct assumption?
Ltspice files are attached.
Thanks.

https://www.minicircuits.com/pdfs/PMA5-83-2W+.pdf




 

 

 

test.zip

Изменено 9 часов назад пользователем sergey23

[_Sergey_ 15]

If you look at the datasheet you will see the gate current (IG1) may reach up to 4000uA.

With typical gate voltage (VG1)=-0.8V it gives us 0.8/0.004 = 200 ohms resistance.. not 1M.

[sergey23 0]

Hello Sergey,I understand that the value of the load is irrelevant.

Whats relevant is the ability of the circuit bellow to sink current while keeping the desired -2.5V
When I swept RLoad for different value and i see that at some Rload values i get 8mA(twice the maximal rating) 
How do i know that it will get enough current from my reference regular source ?

LTspice files are attached.
Thanks.
test.zip

 

Изменено 3 часа назад пользователем sergey23

[1113 7]

add 4,7 uF capacitor as load