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Results tagged with rf
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user 312326
Short for Radio Frequency, i.e. frequencies at which radiation (intentional or not) plays a role. Typically associated with wireless communications, but also relevant for high-speed PCB design.
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RF low-power limiter
I have designed an RF front end in the 915 MHz ISM band. This front end is for two radios that interface with an SDR.
The TX portion of the front end will transmit 3 W. …
- 15
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RF high power amp bias scheme
Bias up
Set gate to Vg=-5V
Increase Vg till Id=360mA (drain current), Vg~-2.6V
Apply RF
Bias down
Turn off RF
Decrease Vg to -5V
Turn off supplies
I was thinking of using a current sense amplifier … similar to the LT6106, where my load would be the drain of my RF amp and the Vout of the LT6106 would be the gate of the RF amp. …
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RF high power amp bias scheme
Fred, I was thinking of something like this. Not perfect, but very simple. I think my issue might be the R1 resistor. The R1 is the gate, so I guess I could assume High Z. The node between R2 and R3 w …
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