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HMC7357 Recommended for New Designs
The HMC7357 is a three-stage GaAs pHEMT MMIC Medium Power Amplifier that operates between 5.5 and 8.5 GHz. The amplifier provides 29 dB of gain and +35...
Datasheet
HMC7357 on Analog.com

HMC980LP4E Production
The HMC980LP4E is an active bias controller that can automatically adjust the gate voltage of an external amplifier to achieve constant drain current....
Datasheet
HMC980LP4E on Analog.com

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HMC7357 and HMC980 - Vg voltage setting issue



		

			

									
					    Niko99
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Feb 19, 2022 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Dear EZ Users,
    

    I have a question related to setting minimal Vg voltage of HMC980 biasing an amplifier HMC7357.
    HMC980 has a default Vg = -2.06V , without resistor between VGATE and VGATEFB. However, HMC7357 has maximum rating of Vg between -2 and -0.4V.
    

    Should I increase resistor between VGATE and VGATEFB to 1.6kOhm(caluclated from formula), to increase initial Vg to -2V ?
    Can I left VNEG unchanged?
    

    Best regards
    SiNK