Agilent Technologies E3633A Operating Manual page 152

Chapter 7 Tutorial
Output Characteristics
Figure 7-6. Simplified Diagram of Common Mode and Normal Mode
Sources of Noise
W h e n t h e l o a d c h a n g e s v e r y r a p i d l y , a s w h e n a r e l a y c o n t a c t i s c l o s e d , t h e
i n d u c t a n c e i n t h e h o o k u p w i r e a n d i n t h e p o w e r s u p p l y o u t p u t w i l l c a u s e a
s p i k e t o a p p e a r a t t h e l o a d . T h e s p i k e i s a f u n c t i o n o f t h e r a t e o f c h a n g e o f t h e
l o a d c u r r e n t . W h e n v e r y r a p i d c h a n g e s i n l o a d a r e e x p e c t e d , a c a p a c i t o r w i t h
a l o w s e r i e s r e s i s t a n c e , i n p a r a l l e l w i t h t h e p o w e r s u p p l y , a n d c l o s e t o t h e l o a d
i s t h e b e s t w a y t o m i n i m i z e t h e s e v o l t a g e s p i k e s .
140
(E3633A)
(E3634A)