476 

 Then 



HELL SYSTEM TEXUMCAL JOURNAL 



Ib<p = — (/;, ^p + In <fn) 



dx 



Since 



and 





dip ^ _dln ^ r^^ _ ^'l(fp-<Fn)!l'T-j 



dx dx 



dx 



difn 



d^ 



= —In/qtihu 



these two integrals are readily transformed into the ones })reviously dis- 

 cussed. 



APPENDIX II 



Admittance in a Retarding Field 



We shall here derive the admittance equation for holes diffusing into a 

 retarding potential ;/' = kTx qLr in which the potential increases by^Tin 

 each distance Lr . The differential equation for the a-c. component of p is 



Tp dx [_ dx dx . 



This equation may be solved by letting p = p\ exp(/co/ — 7.v) as may be 

 seen by rewriting the equation and substituting this expression for p: 



D 



Vd\p ,^op 



La.V^ Lr dX_ 



— (1 + io}Tp)p 

 rp 



= -yD -7 + ^ U - - (1 + '^^■'p^P = 



leading to 



7 = 



1 + [1 + i2Lr/Lp)\\ + io^Tp)] 



1/2 



