CN101726698B - Method and device for pairing triodes - Google Patents
Method and device for pairing triodes Download PDFInfo
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- CN101726698B CN101726698B CN 200910243527 CN200910243527A CN101726698B CN 101726698 B CN101726698 B CN 101726698B CN 200910243527 CN200910243527 CN 200910243527 CN 200910243527 A CN200910243527 A CN 200910243527A CN 101726698 B CN101726698 B CN 101726698B
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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
The present invention relates to transistor arts, more particularly, relate to a kind of triode matching method and a kind of device of realizing the triode matching method.
Background technology
Transistor is one of basic components and parts of semiconductor, has the electric current amplification, is the core parts of electronic circuit.The triode model is various, and performance is different, will carry out parameter testing to triode before use, and mostly the test of triode at present is according to transistor data bool single only transistorized dc parameter (I
CEO, V
CEO, V
CESAnd H
FE) carry out static test.
Yet, in practical application, need some triodes to be used often, but because mismate causes damage to triode; Illustrate, two triode parallel connections in power amplification circuit are used, and do not cause one of them triode full-load run because triode interchange enlargement factor matches; And another no-load running, this moment, total current increased suddenly, will cause that then the triode performance parameter changes with the temperature rising; Or the triode performance descends; What is more, be lower than said total current if the maximum of one of them triode can be born electric current, then this triode will damage owing to overcurrent.
To sum up, the static test of said triode dc parameter can not be proceeded from the reality the performance of triode is tested and verified, the problem of currents match in the time of can not solving in practical application triode work, and be prone to cause triode to damage.
Summary of the invention
In view of this, the present invention provides a kind of triode matching method and device, with through test and relatively the transistor collector electric current guarantee electric current mobile equilibrium at triode described in the practical application, thereby play the purpose of protection triode.
A kind of triode matching method: in the same one-level amplifying unit of push-pull circuit, insert the triode that needs pairing;
Transformer input end input stabilization signal at push-pull circuit;
Test and the more said pairing transistor collector electric current that needs obtain the collector current difference;
Judge that said collector current difference is whether in preset range.
Make the input of triode received current at said push-pull circuit input end input stabilization signal; Through test and the more said collector current that needs the pairing triode; Guarantee that said collector current differs in preset range with interior and keep mobile equilibrium, reaches the dynamically purpose of pairing of triode.
Preferably, said push-pull circuit is specially the class B push-pull circuit, and the use of said class B push-pull circuit has realized amplification efficient height and low-power consumption.
Preferably, the said triode of pairing that needs inserts in the third level amplifying unit of said class B push-pull circuit, because third level amplifying unit input signal is more steady, considers that from practical application this kind setting is beneficial to the test and the comparison of transistor collector electric current.
Preferably; Each transistor collector electric current of said test is specially: the reometer of on said each transistor collector, respectively connecting obtains said transistor collector electric current registration; Certainly measuring current and the circuit that obtains the electric current registration have multiple; The present invention adopts simple in structure, common current table with low cost.
Preferably; Said method also comprises: test the said total current that each need match the transistor collector electric current; The total current of testing said transistor collector is the auxiliary monitoring effect that carries out on the basis that reaches the pairing effect, plays to prevent that input current is excessive and puncture the effect that needs the pairing triode.
Preferably; Before the third level amplifying unit that inserts said push-pull circuit; Also comprise the said static parameter that needs the pairing triode of test, the measurement of carrying out said static parameter guarantees the qualified basically of triode, guarantees further the carrying out of step such as test and pairing.
Preferably; In the same one-level amplifying unit of push-pull circuit, insert before the triode that needs pairing; Also be included in the classification of the triode that carries out in the same interchange enlargement factor scope; The classification of said triode has improved matching efficiency, has reduced simultaneously in when test because triode exchanges enlargement factor to differ the damage that the too big body heating that causes etc. causes triode.
Preferably, said transformer input end is imported stabilization signal respectively and is specially: at the transformer input end input frequency-shift signaling of triode power amplification circuit, it is 2000Hz that said frequency-shift signaling is specially carrier frequency; Amplitude is the sine wave of 1.5V; The stack low frequency is 20.2Hz, and frequency deviation is the square wave of 11Hz, and selecting said frequency-shift signaling for use is the situation when simulating practical application; Thereby reach the purpose of the practical application of fitting as much as possible, receive and well and reliably match effect.
A kind of device of realizing the triode matching method, said push-pull circuit and current measuring device, said current measuring device are located at push-pull circuit with on the one-level amplifying unit circuit, are used to measure the electric current of the need pairing transistor collector that is arranged on this amplifying unit.
Preferably, said push-pull circuit is selected the class B push-pull circuit for use, and said current measuring device is specially reometer, and connecting with said need pairing transistor collector also together is arranged in the said class B push-pull circuit third level amplifying unit.
Can find out from above-mentioned technical scheme; The disclosed triode matching method of the embodiment of the invention and device make the input of triode received current through push-pull circuit input end input stabilization signal; Through test and the more said collector current that needs the pairing triode; Guarantee that said collector current differs in preset range with interior and maintenance mobile equilibrium; Reach the dynamically purpose of pairing of triode, thereby play triode input current mobile equilibrium in the actual use, prevent owing to the triode that is used exchanges the overcurrent puncture that enlargement factor does not match and causes; In addition, the said pairing triode that needs is located in the third level amplifying unit of class B push-pull circuit, the measurement and the pairing of the high-level efficiency low-power consumption that has realized under the stationary signal input, carrying out; In addition; The classification of before said triode inserts said push-pull circuit, carrying out, the mensuration of static parameter according to same interchange enlargement factor scope, and cooperate the said total current that each need match transistor collector that is input to of testing in the pairing process to guarantee that the triode pairing carries out safely and efficiently; In addition, import the signal of the signal imitation practical application of said push-pull circuit, improved the pairing effect of said triode applying practical application further, reduced the potential safety hazard that the damage because of triode causes; Simultaneously, the present invention realizes that the step of triode pairing is simple, easy to operate, and realizes that the installation cost of said triode matching method is cheap, and is simple for structure, safe and reliable.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the embodiment of the invention one disclosed a kind of triode matching method process flow diagram;
Fig. 2 is the embodiment of the invention two disclosed a kind of triode matching method process flow diagrams;
Fig. 3 is the disclosed a kind of apparatus structure synoptic diagram of realizing the triode matching method of the embodiment of the invention.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
The present invention provides a kind of triode matching method and device, with through test and relatively the transistor collector electric current guarantee electric current mobile equilibrium at triode described in the practical application, thereby play the purpose of protection triode.
Needing before embodiment explains to carry out clear and definite: push-pull circuit is divided into power amplification push-pull circuit and power switch push-pull circuit; Its principle of work is to have two power tubes to accomplish respectively the positive half cycle of signal and negative half period: when positive half cycle arrives, accomplish amplification by the first power tube; When negative half period arrives, accomplish amplification by the second power tube.Amplified the last synthetic complete signal in back, simple in structure based on said push-pull circuit, switch transformer magnetic core utilization factor is high, and conduction loss is little, utilizes the above-mentioned principle and advantage of push-pull circuit to carry out the said pairing triode that needs is carried out.
Explanation for ease, below listed examples be two groups, totally four triodes if any the pairing of many group triodes, all take the way of description to carry out in the situation of said class B push-pull circuit pairing, enumerate elaboration no longer one by one:
Fig. 1 shows embodiment one disclosed a kind of triode matching method flow process, comprising:
Step 101: in the same one-level amplifying unit of push-pull circuit, insert the triode that needs pairing;
Step 102: at the transformer input end input stabilization signal of push-pull circuit;
Step 103: test and the more said pairing transistor collector electric current that needs obtain the collector current difference;
Step 104: whether judge said collector current difference smaller or equal to 200mA, if in this scope then successful matching; As not in this scope, then use other triode pairing again instead.
In view of disclosed four triodes pairing of present embodiment; For the pairing between two groups of triodes, following flow process requirement is arranged, two groups of overall differences of electric current on positive half cycle of waveform amplification or negative half period are less than 300mA; As surpassing this value, then might cause the performance of entire circuit to descend.
Need to prove that said stabilization signal is specially frequency-shift signaling.
Can find out by above embodiment; Said triode matching method and device make the input of triode received current through push-pull circuit input end input stabilization signal; Through test and the more said collector current that needs the pairing triode; Guarantee that said collector current differs in preset range with interior and maintenance mobile equilibrium; Reach the dynamically purpose of pairing of triode, thereby play triode input current mobile equilibrium in the actual use, prevent owing to the triode that is used exchanges the overcurrent puncture that enlargement factor does not match and causes.
Fig. 2 shows embodiment two disclosed a kind of triode matching method flow processs, comprising:
Step 201: test the said static parameter that needs the pairing triode;
Step 202: triode is classified according to same interchange enlargement factor scope;
Step 203: in the third level amplifying unit of class B push-pull circuit, insert the triode that needs pairing;
Step 204: the transformer input end input carrier frequency at the class B push-pull circuit is 2000Hz, and amplitude is the sine wave of 1.5V, and the stack low frequency is 20.2Hz, and frequency deviation is the square wave of 11Hz;
Step 205: the reometer of on said each transistor collector, respectively connecting, test and more said each transistor collector electric current, observe the electric current of said transistor collector, obtain the collector current difference;
Step 206: whether judge said collector current difference smaller or equal to 200mA, two groups of triode current errors are less than 300mA, if in this scope then successful matching; As not in this scope, then again the classification with match again.
Need to prove that measuring current and the circuit that obtains the electric current registration have multiple, the present invention adopts simple in structure, common current table with low cost; In the test process of said step 205, can test the total current of said two need pairing transistor collector electric current, play preventing that input current is excessive and puncture the effect that needs the pairing triode, reach the auxiliary monitoring effect on the basis of realizing pairing.
What needs were further clear and definite is:
(1) according to the disclosed scheme of embodiment, the classifying rules that step 202 adopted is: the difference that four triode enlargement factors compare in twos should be above 1000 times.
(2) further, because transistorized thermal sensitivity is very big to pairing influence, test fixture needs good heat radiating, and the temperature of triode drops to environment temperature and carries out.
The above-mentioned more said current error of pairing triode that needs can be preset according to actual conditions, is not limited in the scope that the embodiment of the invention is enumerated.
Can be found out by above embodiment: the measurement of carrying out said static parameter is in order to guarantee the qualified of triode, to guarantee further the carrying out of step such as test and pairing; The classification of the triode that carries out in the same interchange enlargement factor scope has improved matching efficiency, has reduced simultaneously in when test because triode exchanges enlargement factor to differ the damage that the too big body heating that causes etc. causes triode; The use of class B push-pull circuit has realized amplifying the effect of efficient height and low-power consumption; Third level amplifying unit input signal is more steady in addition, considers that from practical application this kind setting is beneficial to the test and the comparison of transistor collector electric current; The frequency-shift signaling of selecting for use is simulated the practical application situation, reaches the purpose of the practical application of fitting as much as possible.
Fig. 3 shows the disclosed a kind of device of realizing the triode matching method of the embodiment of the invention, comprising:
Said push-pull circuit 301 and current measuring device, said current measuring device are located at said push-pull circuit 301 with on the one-level amplifying unit circuit, are used to measure the electric current that needs the pairing transistor collector; More specifically; As shown in the figure, said push-pull circuit can be selected the class B push-pull circuit for use, and said current measuring device is specially reometer 302; Be arranged in the said class B push-pull circuit third level amplifying unit 305, and connect with the transistor collector of need pairing.
Also show the first order amplifying unit 303 and second level amplifying unit 304 of said push-pull circuit among Fig. 3, it is to prevent to increase in preceding two-stage causes burr to amplify with regard to adopting high-power amplifying signal interference thereupon that the preferred said third level amplifying unit of present embodiment matches.
Need to prove that testing the said circuit that needs the electric current of pairing transistor collector and obtain the electric current registration has multiplely, the present invention adopts simple in structure, common current table with low cost; What indicate among the figure is two reometers wherein, the function of remaining reometer, with to that indicated in the drawings identical of the annexation of miscellaneous part, here no longer mark with give unnecessary details; Obviously, said push-pull circuit comprises output terminal, and said output terminal is connected with peripheral hardware for said device, indicates no longer in the drawings here and too much gives unnecessary details.
Find out that by above embodiment said device is installed in the third level amplifying unit of class B push-pull circuit through triode, and utilize reometer that the said pairing transistor collector electric current that needs is measured; Realize the pairing of triode; This apparatus structure is succinct, and is safe and reliable, with low cost.
Each embodiment adopts the mode of going forward one by one to describe in this instructions, and what each embodiment stressed all is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.For the disclosed device of embodiment, because it is corresponding with the embodiment disclosed method, so description is fairly simple, relevant part is partly explained referring to method and is got final product.The professional and technical personnel can use distinct methods to realize described function to each certain applications, but this realization should not thought and exceeds scope of the present invention.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments among this paper.Therefore, the present invention will can not be restricted to these embodiment shown in this paper, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (8)
1. a triode matching method is characterized in that, comprising:
In the same one-level amplifying unit of push-pull circuit, insert the triode that needs pairing;
Transformer input end input stabilization signal at push-pull circuit; Said push-pull circuit is specially the class B push-pull circuit; The said triode of pairing that needs inserts in the third level amplifying unit of said class B push-pull circuit;
Test and the more said transistor collector electric current that needs pairing obtain the collector current difference;
Judge that said collector current difference is whether in preset range.
2. triode matching method according to claim 1; It is characterized in that said test and the transistor collector electric current that relatively need match are specially: the reometer of on the said transistor collector that needs to match, respectively connecting obtains the said transistor collector electric current registration that needs pairing.
3. triode matching method according to claim 1 is characterized in that, also comprises: test the total current to the transistor collector electric current that said need are joined.
4. triode matching method according to claim 1 is characterized in that, before the third level amplifying unit that inserts said push-pull circuit, also comprises the said static parameter that needs the pairing triode of test.
5. according to each described triode matching method of claim 1, it is characterized in that, in the same one-level amplifying unit of push-pull circuit, insert before the triode that needs pairing, also be included in the classification of the triode that carries out in the same interchange enlargement factor scope.
6. triode matching method according to claim 1; It is characterized in that; The transformer input end is imported stabilization signal respectively and is specially: at the transformer input end input frequency-shift signaling of triode power amplification circuit, it is 2000Hz that said frequency-shift signaling is specially carrier frequency, and amplitude is the sine wave of 1.5V; The stack low frequency is 20.2Hz, and frequency deviation is the square wave of 11Hz.
7. a device of realizing the triode matching method is characterized in that, is used to realize the said triode matching method of claim 1, comprising:
Push-pull circuit and current measuring device, said current measuring device are located at push-pull circuit with on the one-level amplifying unit circuit, are used to measure and relatively be arranged on the electric current of the transistor collector of the need pairing on this amplifying unit, obtain the collector current difference;
Said push-pull circuit is specially the class B push-pull circuit, and said amplifying unit is specially said class B push-pull circuit third level amplifying unit.
8. device according to claim 7 is characterized in that said current measuring device is specially reometer, and connecting with the said transistor collector that need match also together is arranged in the said class B push-pull circuit third level amplifying unit.
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SU693278A1 (en) * | 1977-12-05 | 1979-10-25 | Куйбышевский политехнический институт им. В.В.Куйбышева | Device for selecting pairs of transistors |
CN1976023A (en) * | 2005-07-26 | 2007-06-06 | 英飞凌科技股份公司 | Output match transistor |
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Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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SU693278A1 (en) * | 1977-12-05 | 1979-10-25 | Куйбышевский политехнический институт им. В.В.Куйбышева | Device for selecting pairs of transistors |
CN1976023A (en) * | 2005-07-26 | 2007-06-06 | 英飞凌科技股份公司 | Output match transistor |
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