Coper
Member level 4
I would like to clarify a few things
I have this circuits. Yes it si any RF PA with MOSFET.
The first question how to calculate the size of the coil L2?
Is this approach correct?
L2 with Ciss in **broken link removed** make resonant circuits on working frequency. If yes
Ciss on gate Threshold Voltage 3.5V is about 220pF
f is 13,56MHz and resonant L is 626nH not 570nH
Second option id simple L2 only set impedance of source on 50Ohm i.e. is supposed to be Xl=50 L2=587nH.
How is it?
Will have a second question about choosing the size and material of the toroids, but it will be clear what the size of L2 is
I have this circuits. Yes it si any RF PA with MOSFET.
The first question how to calculate the size of the coil L2?
Is this approach correct?
L2 with Ciss in **broken link removed** make resonant circuits on working frequency. If yes
Ciss on gate Threshold Voltage 3.5V is about 220pF
f is 13,56MHz and resonant L is 626nH not 570nH
Second option id simple L2 only set impedance of source on 50Ohm i.e. is supposed to be Xl=50 L2=587nH.
How is it?
Will have a second question about choosing the size and material of the toroids, but it will be clear what the size of L2 is