DOUBLE-SIDED AMPLIFIERS 



Differentia! 

 cathode 

 resistor for 



HT- 



Stafic balance 

 when R^^^s at 

 max. 



Figure 12.38 



HT+ 



Gain ^ 

 balance 



Output 



Coarse 

 gain 



HT+ 



Input 



Gain > ■* (^ « c 

 balancer | ^ 



Static balance 

 meter ^ 



Low-gain /^n 

 static Y T^" 



balance J i~^ 

 c 

 HT--J -D 



Compensating 

 HT+ capacitance 



to earth for 'hT+ 

 static balancing 

 circuit 



Figure 12.40 



192 



