Method and device for pairing triodes

Abstract

The embodiment of the invention discloses a method for paring triodes, which comprises the following steps of: connecting the triodes to be paired to an equative amplifying unit of a push-pull circuit; inputting a stable signal at an input end of a transformer of the push-pull circuit; testing and comparing collector currents of the triodes to be paired to acquire a collector current difference value; and judging whether the collector current difference value is in a preset range or not. The triode receives the input current by inputting the stable signal at the input end of the push-pull circuit and the collector current difference value is ensured in the preset range and the dynamic balance is kept by testing and comparing the collector currents of the triodes to be paired so as to dynamically pair the triodes. The invention also discloses a device for implementing the method for paring the triodes, which implements the pairing for the triodes by arranging the triodes in the equative amplifying unit of the push-pull circuit and measuring the collector currents of the triodes to be paired. The device has a compact structure, safe and reliable use and low cost.

Description

technical field [0001] The present invention relates to the technical field of transistors, and more specifically, to a triode pairing method and a device for realizing the triode pairing method. Background technique [0002] Crystal triode is one of the basic components of semiconductors. It has the function of current amplification and is the core component of electronic circuits. There are various types of triodes and different performances. Before use, the parameters of the triode should be tested. At present, the test of the triode is mostly based on the DC parameters of a single transistor (I CEO , V CEO , V CES and H FE ) for static testing. [0003] However, in practical applications, several triodes are often required to be used together, but the triodes are damaged due to improper coordination. For example, two triodes are used in parallel in a power amplifier circuit, and one of the triodes runs at full load due to the mismatch of the AC magnification of the t...

AI Technical Summary

Problems solved by technology

[0003] However, in practical applications, several triodes are often required to be used together, but the triodes are damaged due to improper coordination. For example, two triodes are used in parallel in a power amplifier circuit, and one of the triodes runs at full load due to the mismatch of the AC magnification of the triodes. And another no-load operation, at this time the total current suddenly increases, it will cause the performance parameters of the triode to change with the temperature rise, or the performance of the triode will decline, what's more, if the maximum withstand current of one of the triodes is lower than the total current , then the triode will be damaged due to overcurrent

[0004] In summary, the static test of the DC parameters of the triode cannot test and verify the performance of the triode from the actual point of view, and cannot solve the problem of current matching when the triode is working in practical applications, and it is easy to cause damage to the triode

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