EMRFD Message Archive 15373

Message Date From Subject
15373 2019-08-23 13:23:40 zmetzing Silicon Carbide MOSFETs for PAs?

Has anyone here done work on SiC FET power amplifiers?


The Cree C3M0280090D has caught my eye with low Rds(on), high Vds, high Id, low input and output capacitance, etc. It's also fairly cheap at ~$3 each.


--- Zach

N0ZGO

15374 2019-08-23 21:17:22 Ashhar Farhan Re: Silicon Carbide MOSFETs for PAs?
There is a reverse protection diode that will clamp the negative swing of the rf. But otherwise, it looks good. The Crss 
is just 2pf! 
With the lower cost GaNs arriving too, it looks like we are poised to bringing out the old 250-0-250 transformers back. Two days ago, i salvaged a number of chokes and power transformers from carcasses of old transmitters that were 'gifted' to me. I threw out the chassis. Now onto mouser.com...

15375 2019-08-24 00:57:17 Sandeep Lohia Re: Silicon Carbide MOSFETs for PAs?


15377 2019-08-24 09:19:39 Raj Re: Silicon Carbide MOSFETs for PAs?
There is a diode in IRF511 also Farhan!

At 24-08-19, you wrote:
 

There is a reverse protection diode that will clamp the negative swing of the rf. But otherwise, it looks good. The CrssÂ
is just 2pf!Â
With the lower cost GaNs arriving too, it looks like we are poised to bringing out the old 250-0-250 transformers back. Two days ago, i salvaged a number of chokes and power transformers from carcasses of old transmitters that were 'gifted' to me. I threw out the chassis. Now onto mouser.com...

15379 2019-08-24 09:22:20 Raj Re: Silicon Carbide MOSFETs for PAs?
There is a diode in IRF511 also Farhan!

At 24-08-19, you wrote:
 

There is a reverse protection diode that will clamp the negative swing of the rf. But otherwise, it looks good. The CrssÂ
is just 2pf!Â
With the lower cost GaNs arriving too, it looks like we are poised to bringing out the old 250-0-250 transformers back. Two days ago, i salvaged a number of chokes and power transformers from carcasses of old transmitters that were 'gifted' to me. I threw out the chassis. Now onto mouser.com...