Patent ID: 11888448
Assignee: MACOM TECHNOLOGY SOLUTIONS HOLDINGS, INC.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 2:
3. A power amplifier comprising:
a main amplifier coupled to a first combining node;
a first impedance inverter between the main amplifier and the first combining node;
a first peaking amplifier directly connected to the first combining node;
a second impedance inverter between the first combining node and a second combining node;
a second peaking amplifier coupled to the second combining node; and
a third impedance inverter between the second peaking amplifier and the second combining node wherein:
Zo2 is a characteristic impedance for the second impedance inverter;
Zo3 is a characteristic impedance for the third impedance inverter; and
a ratio of Zo2 and Zo3 substantially satisfies the following relation to within 10%:, Z
     
      O
      ⁢
      3
     
    
    
     Z
     
      O
      ⁢
      2
     
    
   
   =
   
    
     (
     
      
       i
       m
      
      +
      
       i
       1
      
     
     )
    
    
     
      
       i
       1
      
      ⁢
      
       i
       2
      
     
    
   
  
  ,
 

where im represents a maximum amount of current output by the main amplifier, i1 represents a maximum amount of current output by the first peaking amplifier, and i2 represents a maximum amount of current output by the second peaking amplifier when the main amplifier, the first peaking amplifier, and the second peaking amplifier are fully amplifying.