Hello, i have a QPA2575 amplifier shown bellow , there are two connections of Vd and two connections of Vg .
Vg_top and Vg buttom are connected together on the same voltage,so id Vd.
I need to tune this amplifier by controlling the bias point ,so we get quecent current of
I read about a method where we ned to connect a potentimeter in parralel to VD and connect it to ground and measure the current .
1.what potentiometer do you reccoment to use for this purpose?
2.looking at the layout ,where do you reccomend me to put the potentiometer so i will be able to measure the current going into the amplifier?
Thanks.
https://www.qorvo.com/products/p/QPA2575
![1694257497212.png 1694257497212.png](https://forum.allaboutcircuits.com/data/attachments/290/290033-d4aa8dbcd3a870e0972f62849e9791c4.jpg)
![1694257518258.png 1694257518258.png](https://forum.allaboutcircuits.com/data/attachments/290/290034-3960c1ad13a050e16b675f1825d1f845.jpg)
Vg_top and Vg buttom are connected together on the same voltage,so id Vd.
I need to tune this amplifier by controlling the bias point ,so we get quecent current of
I read about a method where we ned to connect a potentimeter in parralel to VD and connect it to ground and measure the current .
1.what potentiometer do you reccoment to use for this purpose?
2.looking at the layout ,where do you reccomend me to put the potentiometer so i will be able to measure the current going into the amplifier?
Thanks.
https://www.qorvo.com/products/p/QPA2575
![1694257497212.png 1694257497212.png](https://forum.allaboutcircuits.com/data/attachments/290/290033-d4aa8dbcd3a870e0972f62849e9791c4.jpg)
![1694257518258.png 1694257518258.png](https://forum.allaboutcircuits.com/data/attachments/290/290034-3960c1ad13a050e16b675f1825d1f845.jpg)