Apparatus and methods for reducing interference in radio-frequency apparatus

Abstract

A converter in a radio-frequency (RF) apparatus includes a feedback circuitry. The feedback circuitry has a shielded input and a shielded output. The shielded input and the shielded output of the feedback circuitry tend to reduce interference in the converter.

We claim:  
     
         1 . A converter in a radio-frequency (RF) apparatus, the converter comprising a feedback circuitry having a shielded input and a shielded output, wherein the shielded input and the shielded output tend to reduce interference in the converter.  
     
     
         2 . The converter according to  claim 1 , further comprising: 
 a first filter coupled to the shielded input of the feedback circuitry; and    a second filter coupled to the shielded output of the feedback circuitry.    
     
     
         3 . A method of reducing interference in a non-linear circuit in a radio-frequency (RF) apparatus, wherein the non-linear circuit has an input and an output, the method comprising: 
 shielding an input of the non-linear circuit; and    shielding an output of the non-linear circuit.    
     
     
         4 . The method according to  claim 3 , further comprising filtering an input signal supplied to the input of the non-linear circuit.