What SCR in the circuit main purpose is Ug arrived early, thyristor of time early;? Ug late arrival, SCR conduction time later. By changing the time of the trigger pulse control on arrival Ug pole SCR BTA216, you can adjust the output voltage on the load average UL (the size of the shaded area). In electrical technology, often alternating current half cycle for 180 °, called the electrical angle. Thus SCR BTA140, U2 in each positive half cycle, starting from a zero value to the electrical angle of the trigger pulse arrives moment experienced by known control angle α; at each positive half-cycle of the electrical angle thyristor called guide angle θ. Obviously, α and θ are used to denote the thyristor conduction or blocking withstand voltage of the positive half cycle of. By changing the control angle α or conduction angle θ, change pulsed DC voltage across the load average of UL, to achieve a controlled rectifier. What is a single-junction transistor? What special features does it have? Also known as single-junction transistor double base diode, is a semiconductor device (Fig. 6) by a PN junction and three electrode composition. Let's draw a diagram of its structure [Figure 7 (a)]. In a N-type silicon at both ends, making the two electrodes SCR BTA412Y, are called first base and second base B1 B2; B2 near the other side of the wafer produced a PN junction at SCR, the equivalent of a diode, the P region called the emitter electrode leads E. To facilitate the analysis, you can put an N-type region B1, B2 between the equivalent to a pure resistance SCR BTA216, SCR, are fertile Electronics Dongguan City is provided by Wal-Electronic Technology Co., Ltd. Dongguan City is Wal-Electronic Technology Co., Ltd. (www.dgmydz.com) (www.dgmydz.com) strong, credible, FET and other industries in Dongguan, Guangdong has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the electronics are fertile and you hand into the brilliant, for a better future!