| 摘要 |
<p>A trimming circuit has a plurality of zener zap diodes (Z11,Z12,Z13), a group of switching devices (Q14,Q15,Q16) for selectively zapping the zener zap diodes (Z11,Z12,Z13), and a decoder circuit (B11) for controlling the ON/OFF states of the switching devices (Q14,Q15,Q16). <IMAGE></p> |
