if two of a semiconductor material

if two of a semiconductor material , one of P-type and one of N-type, are joined together , a PN junction if formed . This junction can be used as a rectifier and is known as a PN junction diode.
Figure 1 illustrates what happen when voltage is supplied across a silicon PN Junction diode. the first quadrant of the graph shows the characteristics of the diode when the source is connected with the positive to the P-side of the conjunction and the negative to the N-side . in the other words, the diode is forwards bias, the current at fist increases slowly . when the applied voltage reaches about 60 mv, the current rises rapidly. the diode is then a good conductor . the current will continue to rise with increased voltage but eventually a point will be reached where the diode is destroyed by the heat.
The third quadrant shows the characteristics when the source is connected with the positive to the N-side and the negative to the N-side . when the diode is reserved biased , there is almost no current to flow, the junction is therefore a good rectifier : it conducts well in one direction and almost not at all in the other . however , there is a small reversed leakage current . this leakage current remains substantially constant until what is knows as breakage voltage (vb) is reached .at this point , there is a sharp increase in the reverse current . this sudden increase in current is called Zender effect.
Normal diodes are never operated in the breakdown region but Zender diodes are designed to make use of the breakdown phenomenon. Because any slight increase in the voltage beyond the breakdown point cause a large increase in current . Zender diodes are often used as a kind of overspill to protect sensitive circuit from fluctuation in the power supply

Kết quả (Việt) 1:

if two of a semiconductor material , one of P-type and one of N-type, are joined together , a PN junction if formed . This junction can be used as a rectifier and is known as a PN junction diode.Figure 1 illustrates what happen when voltage is supplied across a silicon PN Junction diode. the first quadrant of the graph shows the characteristics of the diode when the source is connected with the positive to the P-side of the conjunction and the negative to the N-side . in the other words, the diode is forwards bias, the current at fist increases slowly . when the applied voltage reaches about 60 mv, the current rises rapidly. the diode is then a good conductor . the current will continue to rise with increased voltage but eventually a point will be reached where the diode is destroyed by the heat.The third quadrant shows the characteristics when the source is connected with the positive to the N-side and the negative to the N-side . when the diode is reserved biased , there is almost no current to flow, the junction is therefore a good rectifier : it conducts well in one direction and almost not at all in the other . however , there is a small reversed leakage current . this leakage current remains substantially constant until what is knows as breakage voltage (vb) is reached .at this point , there is a sharp increase in the reverse current . this sudden increase in current is called Zender effect.Điốt bình thường không bao giờ được sử dụng vào vùng sự cố nhưng Zender điốt được thiết kế để làm cho việc sử dụng hiện tượng Niu Di-lân. Bởi vì bất kỳ sự gia tăng nhẹ điện áp ngoài phân tích điểm gây ra một sự gia tăng lớn trong hiện tại. Zender điốt thường được sử dụng như một loại overspill để bảo vệ mạch nhạy cảm từ các biến động trong việc cung cấp điện