Rectifier diode, detector diode, photosensitive diode, light emitting diode, constant current diode, zener diode, etc. There are also special uses:
I. Constant current diode
1. The function of constant current diode
Constant current diode (CRD) is a diode used to stabilize current, which can provide constant current in a wide range of voltage changes. Constant-current diodes are mainly used in various amplification circuits (such as audio power amplification circuits), oscillation circuits and regulated power supply circuits, and are used as constant-current sources or constant-current bias elements in circuits. 2. Commonly used constant current diode
The commonly used constant current diode is 2DH series.
Second, the compensation diode
1. The function of compensation diode
Compensation diode is a kind of semiconductor diode with good temperature and voltage stabilization characteristics, which is widely used in various transistor radios, audio systems and communication equipment for temperature compensation and power supply step-down compensation.
2. Ordinary compensation diode
Commonly used compensation diodes are 2CB series, etc. 2CB series compensation diodes are encapsulated by epoxy ceramic discs.
Three, double base diode
Structure and function of 1. double base diode
Double base diode, also known as single junction transistor, is a three-terminal negative resistance device with PN junction. Double-base diode consists of PN junction and n-type silicon wafer. Two Bases B 1 and B2 are led out from two ends of the silicon wafer, and the electrodes led out from the P-type semiconductor of the PN junction are emitters e ... baseb1and base.
B2 can be equivalent to a pure resistance, that is, the base resistance RBB. The resistance of the resistor varies with the emitter current. Double base diodes are widely used in various oscillators, timers and controller circuits.
2. Commonly used double-base diodes
Commonly used double-base diodes are BT3 1 series, BT32 series and BT33 series.
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