CN101726698A - Method and device for pairing triodes - Google Patents
Method and device for pairing triodes Download PDFInfo
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- CN101726698A CN101726698A CN 200910243527 CN200910243527A CN101726698A CN 101726698 A CN101726698 A CN 101726698A CN 200910243527 CN200910243527 CN 200910243527 CN 200910243527 A CN200910243527 A CN 200910243527A CN 101726698 A CN101726698 A CN 101726698A
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- triode
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- pull circuit
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- amplifying unit
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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, often need some triodes to be used in actual applications, but because mismate causes damage to triode, illustrate, two triodes in parallel use in power amplification circuit, because triode interchange enlargement factor does not match and causes one of them triode full-load run, and another no-load running, this moment, total current increased suddenly, to cause that then the triode performance parameter changes with the temperature rising, or the decline of triode performance, what is more, be lower than described 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 described 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 triode work in actual applications, and easily cause triode to damage.
Summary of the invention
In view of this, the invention provides a kind of triode matching method and device, guarantee the electric current mobile equilibrium of described triode in actual applications to pass through test and to compare the transistor collector electric current, 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 described pairing transistor collector electric current that needs obtain the collector current difference;
Judge that described collector current difference is whether in preset range.
Make the input of triode received current at described push-pull circuit input end input stabilization signal, by test and the more described collector current that needs the pairing triode, guarantee that described collector current differs in preset range with interior and keep mobile equilibrium, reaches the dynamically purpose of pairing of triode.
Preferably, described push-pull circuit is specially the class B push-pull circuit, and the use of described class B push-pull circuit has realized amplification efficient height and low-power consumption.
Preferably, the described triode of pairing that needs inserts in the third level amplifying unit of described class B push-pull circuit, because third level amplifying unit input signal is more steady, considers that for 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 described test is specially: the reometer of respectively connecting on described each transistor collector obtains described 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, described method also comprises: test the described total current that each need match the transistor collector electric current, the total current of testing described 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 described push-pull circuit, also comprise the described static parameter that needs the pairing triode of test, the measurement of carrying out described static parameter guarantees the qualified substantially 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 described 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, described 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 described 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 described frequency-shift signaling for use is 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, described push-pull circuit and current measuring device, described 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, described push-pull circuit is selected the class B push-pull circuit for use, and described current measuring device is specially reometer, and connecting with described need pairing transistor collector also together is arranged in the described class B push-pull circuit third level amplifying unit.
From above-mentioned technical scheme as can be seen, disclosed triode matching method of the embodiment of the invention and device make the input of triode received current by push-pull circuit input end input stabilization signal, by test and the more described collector current that needs the pairing triode, guarantee that described 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 described pairing triode that needs is located in the third level amplifying unit of class B push-pull circuit, has realized the measurement and the pairing of the high-level efficiency low-power consumption carried out under the stationary signal input; In addition, the classification of before described triode inserts described push-pull circuit, carrying out, the mensuration of static parameter according to same interchange enlargement factor scope, and cooperate the described 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 described push-pull circuit, improved the pairing effect of described 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 described 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, apparently, 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
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, 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 belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
The invention provides a kind of triode matching method and device, guarantee the electric current mobile equilibrium of described triode in actual applications to pass through test and to compare the transistor collector electric current, thereby play the purpose of protection triode.
Needing before embodiment illustrates 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 finish respectively the positive half cycle of signal and negative half period: when positive half cycle arrives, finish amplification by the first power tube; When negative half period arrives, finish amplification by the second power tube.Amplified the last synthetic complete signal in back, simple in structure based on described push-pull circuit, switch transformer magnetic core utilization factor height, conduction loss is little, utilizes the above-mentioned principle and advantage of push-pull circuit to carry out the described pairing triode that needs is carried out.
For convenience of description, below listed examples be two groups, totally four triodes if any the pairing of many group triodes, all take the way of following explanation to carry out in the situations of described 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 described pairing transistor collector electric current that needs obtain the collector current difference;
Step 104: whether judge described 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 described stabilization signal is specially frequency-shift signaling.
As can be seen from the above embodiments, described triode matching method and device make the input of triode received current by push-pull circuit input end input stabilization signal, by test and the more described collector current that needs the pairing triode, guarantee that described 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 described 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 described each transistor collector, respectively connecting, test and more described each transistor collector electric current, observe the electric current of described transistor collector, obtain the collector current difference;
Step 206: whether judge described 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 classification and matching again 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 described step 205, can test the total current of described 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 described 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.
As can be seen from the above embodiments: the measurement of carrying out described 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 for 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:
Described push-pull circuit 301 and current measuring device, described current measuring device is located at described push-pull circuit 301 with on the one-level amplifying unit circuit, be used to measure the electric current that needs the pairing transistor collector, more specifically, as shown in the figure, described push-pull circuit can be selected the class B push-pull circuit for use, and described current measuring device is specially reometer 302, be arranged in the described 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 the second level amplifying unit 304 of described 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 described third level amplifying unit of present embodiment matches.
Need to prove that testing the described 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, and with to that indicated in the drawings identical of the annexation of miscellaneous part, mark and giving unnecessary details no longer herein; Apparently, described push-pull circuit comprises output terminal, and described output terminal is connected with peripheral hardware for described device, indicates no longer in the drawings herein and too much gives unnecessary details.
Find out that by above embodiment described device is installed in the third level amplifying unit of class B push-pull circuit by triode, and utilize reometer that the described 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 partly illustrates referring to method and gets final product.The professional and technical personnel can use distinct methods to realize described function to each specific should being used for, 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 herein General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (10)
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;
Test and the more described pairing transistor collector electric current that needs obtain the collector current difference;
Judge that described collector current difference is whether in preset range.
2. triode matching method according to claim 1 is characterized in that, described complementary push-pull circuit is specially the class B push-pull circuit.
3. triode matching method according to claim 2 is characterized in that, the described triode of pairing that needs inserts in the third level amplifying unit of described class B push-pull circuit.
4. triode matching method according to claim 1 and 2 is characterized in that, each transistor collector electric current of described test is specially: the reometer of respectively connecting on described each transistor collector obtains described transistor collector electric current registration.
5. triode matching method according to claim 1 and 2 is characterized in that, also comprises: test described each total current that need match the transistor collector electric current.
6. triode matching method according to claim 1 and 2 is characterized in that, before the third level amplifying unit that inserts described push-pull circuit, also comprises the described static parameter that needs the pairing triode of test.
7. according to claim 1 or 2 each described triode matching methods, 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.
8. triode matching method according to claim 1 and 2, 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 described 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.
9. device of realizing the triode matching method, it is characterized in that, described push-pull circuit and current measuring device, described 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.
10. device according to claim 9, it is characterized in that, described push-pull circuit is specially the class B push-pull circuit, and described current measuring device is specially reometer, and connecting with described need pairing transistor collector also together is arranged in the described class B push-pull circuit third level amplifying unit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910243527 CN101726698B (en) | 2009-12-25 | 2009-12-25 | Method and device for pairing triodes |
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|---|---|---|---|
| CN 200910243527 CN101726698B (en) | 2009-12-25 | 2009-12-25 | Method and device for pairing triodes |
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| CN101726698A true CN101726698A (en) | 2010-06-09 |
| CN101726698B CN101726698B (en) | 2012-05-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288846A (en) * | 2011-06-15 | 2011-12-21 | 博威科技(深圳)有限公司 | Testing method of radio frequency power tubes |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU693278A1 (en) * | 1977-12-05 | 1979-10-25 | Куйбышевский политехнический институт им. В.В.Куйбышева | Device for selecting pairs of transistors |
| US7372334B2 (en) * | 2005-07-26 | 2008-05-13 | Infineon Technologies Ag | Output match transistor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288846A (en) * | 2011-06-15 | 2011-12-21 | 博威科技(深圳)有限公司 | Testing method of radio frequency power tubes |
| CN102288846B (en) * | 2011-06-15 | 2013-09-04 | 博威科技(深圳)有限公司 | Testing method of radio frequency power tubes |
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| CN101726698B (en) | 2012-05-09 |
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