source:Other information release time:2023-05-19 Hits: Popular:PCB Assembly company
The crystal triode is often used in the circuit to use "Q" plus numbers, such as: Q17 represents the triode with a number 17.
1. Features: Crystal triode (referred to as triode) is a special device containing 2 PN knots and has the ability to magnify.
It is divided into two types: NPN type and PNP type. These two types of triode can make up for each other. The so -called OTL circuit
The tube is used by PNP type and NPN type.
The PNP triode commonly used in telephone is: A92, 9015 and other models; NPN type triode is: A42, 9014, 9018,
9013, 9012 and other models.
2. Crystal triode is mainly used to amplify the amplification effect, and there are three ways to connect in common circuits. To facilitate
In contrast, the characteristics of the three types of transistors are listed in the table below for your reference.
Name Corporate Circuit Circuit Circuit Circuit (Electrode Ultimate) Together Circuit Circuit
Input impedance (hundreds of euros to thousands of euros) is large (more than tens of thousand euros) small (a few euros to dozens of euros)
During the output impedance (thousands of euros to tens of thousands of thousands) (a few euros to dozens of euros) large (tens of thousands to hundreds of thousands of thousands of euros)
The voltage amplification multiple is large (less than 1 and is close to 1)
Large multiples of current (tens) large (tens) small (less than 1 and close to 1)
Large power amplification multiple (about 30 to 40 decibels) In small (about 10 points) (about 15-20 decibels)
The frequency characteristics high frequency difference is good
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