FORWARD BIAS

Suppose that the bias at the base of an npn transistor is positive relative to the emitter, starting at small levels and gradually increasing. This is forward bias. If this bias is less than forward breakover, no current flows. However, when the voltage reaches forward breakover, the E-B junction conducts current.
Despite reverse bias at the base-collector (B-C) junction, the emittercollector (E-C) current, more often called collector current and denoted IC, flows when the E-B junction conducts. A small rise in the positive-polarity signal at the base, attended by a small rise in the base current IB, causes a large increase in IC. This is the principle by which a bipolar transistor can amplify signals.

مواضيع ذات صلة

الحجم النووي Nuclean Size

ربوتات النانو (Nanorobots)

تلسكوبات الأشعة تحت الحمراء والسينية

المقاومة الداخلية المرتفعة لبطارية ليثيوم-ايون

أهمية تقنية النانو (Importance of nanotechnology)

متسعات المرشح على التوالي Filter Capacitors in series

أشباه الموصلات

ظاهرة الحفز الضوئي

مكشاف أشباه الموصلات Semiconductor detector

ميكروسكوبات السليكون

تأثيرات الدفيئة وثقب طبقة الأوزون

مخطط الطاقة لوصلة ال PN