Nov 5, 2022 #1 H hari_preetha Full Member level 2 Joined Jun 30, 2014 Messages 127 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,296 Activity points 2,258 I wanted to set Vds = 28 V and IDQ = 250 mA to Power Amplifier. I tried to set it. I am facing problems. Guide me how to set Biasing Vds = 28 V and IDQ = 250 mA. I have attached screen shot of schematic and Cree Transistor data sheet. Attachments CGH40025F_28V_250mA.jpg 210.3 KB · Views: 115 CGH40025F_Transistor.pdf 1.1 MB · Views: 141
I wanted to set Vds = 28 V and IDQ = 250 mA to Power Amplifier. I tried to set it. I am facing problems. Guide me how to set Biasing Vds = 28 V and IDQ = 250 mA. I have attached screen shot of schematic and Cree Transistor data sheet.
Nov 5, 2022 #2 FvM Super Moderator Staff member Joined Jan 22, 2008 Messages 52,469 Helped 14,755 Reputation 29,792 Reaction score 14,116 Trophy points 1,393 Location Bochum, Germany Activity points 298,305 Even a cursory datasheet reading reveals that the transistor requires negative gate bias. Typically -2V gives Id of 250 mA. Upvote 0 Downvote
Even a cursory datasheet reading reveals that the transistor requires negative gate bias. Typically -2V gives Id of 250 mA.
Nov 5, 2022 #3 BigBoss Advanced Member level 6 Joined Nov 17, 2001 Messages 5,958 Helped 1,609 Reputation 3,225 Reaction score 1,593 Trophy points 1,393 Location Türkiye Activity points 35,810 Vgs is negative, change the polarity of SR2 and tune it until Idq is reaches to 250mA. Upvote 0 Downvote