What is the role of the patch triode

Release time:

2024-03-27

Product quality testing:
(1) Measure the interelectrode resistance. Place the multimeter in R× 100 or R× 1K block, and test according to six different connection methods of red and black pens. Among them, the positive resistance value of the emitter junction and the collector junction is relatively low, and the resistance value measured by the other four connection methods is very high, about several hundred kilohms to infinity. However, whether it is low resistance or high resistance, the interelectrode resistance of the silicon triode is much larger than that of the germanium triode.
(2) The value of the penetration current ICEO of the patch triode is approximately equal to the product of the multiple β of the tube and the reverse current ICBO of the collector junction. ICBO increases rapidly with the increase of ambient temperature, and the increase of ICBO will inevitably lead to the increase of ICEO. The increase of ICEO will directly affect the stability of the pipe work, so the use of ICEO should be as small as possible.
Product Classification:
According to the polarity is divided into two kinds: one is NPN type triode, is the most commonly used one, the other is PNP type triode. According to the material is divided into two kinds: one is the silicon triode, is the most commonly used one, the other is the germanium triode, this kind of triode used in the past. The triode is divided into two types according to the working frequency: one is the low-frequency triode, which is mainly used for places with relatively low working frequency; the other is the high-frequency triode, which is mainly used for places with relatively high working frequency. According to the power is divided into three types: one is a low-power triode, its output power is smaller; one is a medium-power triode, its output power is larger; the other is a high-power triode, its output power can be very large, Mainly used for high-power output occasions. According to the purpose is divided into: amplifier tube and switch tube.

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