CN106792347A - A kind of electromagnetic type send ﹑ impedances of receiver and sensitivity ganged circuit - Google Patents
A kind of electromagnetic type send ﹑ impedances of receiver and sensitivity ganged circuit Download PDFInfo
- Publication number
- CN106792347A CN106792347A CN201611080326.5A CN201611080326A CN106792347A CN 106792347 A CN106792347 A CN 106792347A CN 201611080326 A CN201611080326 A CN 201611080326A CN 106792347 A CN106792347 A CN 106792347A
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- China
- Prior art keywords
- circuit
- adjustable impedance
- receiver
- lattice network
- sensitivity
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/002—Damping circuit arrangements for transducers, e.g. motional feedback circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet
- H04R13/02—Telephone receivers
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electromagnetism (AREA)
- Telephone Set Structure (AREA)
Abstract
The invention discloses a kind of electromagnetic type send ﹑ impedances of receiver and sensitivity ganged circuit, it includes sending words output lattice network and called input lattice network；Sending words output lattice network includes transmitter, the first adjustable impedance and the second adjustable impedance, transmitter and the first adjustable impedance composition series circuit, then constitutes parallel circuit with the second adjustable impedance, send words output lattice network to be connected with aircraft instrument telecommunication circuit again；Called input lattice network includes receiver, the 3rd adjustable impedance and the 4th adjustable impedance, receiver and the 3rd adjustable impedance composition series circuit, then constitutes parallel circuit with the 4th adjustable impedance, and called input lattice network is connected with aircraft instrument PAC circuit again.The present invention makes the electromagnetic type send ﹑ impedances of receiver realize that system is adjusted with sensitivity according to the electric network maturity of technology, the corresponding Linear Network device of series and parallel in the magneto microphone and electromagnetic telephone circuit of aircraft ground service staff's helmet.
Description
Technical field
The present invention relates to a kind of electromagnetic type send ﹑ impedances of receiver and sensitivity ganged circuit.
Background technology
At present, use magneto microphone and electromagnetic type called in some aircraft floors staff's helmet both at home and abroad
Device carries out call contact.And these magneto microphones and electromagnetic telephone are at the basic point of 1000HZ, impedance with it is sensitive
Degree all has nominal value.After magneto microphone and electromagnetic telephone are connected in aircraft operating circuit, due to electromagnetic type
There is inconsistency in transmitter and electromagnetic telephone, impedance sometimes at work with aircraft instrument telecommunication circuit and PAC circuit
It is difficult to accomplish matching, working sensitivity is difficult to reach satisfied effect.Further, when magneto microphone and electromagnetic telephone work
After making a period of time, due to being influenceed by magnetic field of the earth or other kicker magnets, some magneto microphones or electromagnetic type are called
The impedance of device can occur certain change with sensitivity, and cause aircraft instrument telecommunication circuit and PAC circuit job insecurity,
Such as get in touch with audio discontinuity or diminish, or even produce noise or utter long and high-pitched sounds.
Accordingly, it is desirable to provide a kind of new technical scheme solves the above problems.
The content of the invention
The technical problem to be solved in the invention is to provide a kind of electromagnetic type send ﹑ impedances of receiver and adjusts electricity with sensitivity system
Road.Make the magneto microphone used in ground service staff's helmet and electromagnetic telephone and aircraft instrument telecommunication circuit and receive
Matching is accomplished in telephone circuit impedance, and working sensitivity reaches satisfied effect.
To solve technical problem of the invention, the technical solution adopted by the present invention is：
A kind of electromagnetic type send ﹑ impedances of receiver and sensitivity ganged circuit, it includes sending words output lattice network and called
Input lattice network；
It is described send words output lattice network include transmitter, the first adjustable impedance and the second adjustable impedance, the transmitter
With the first adjustable impedance constitute series circuit, then with the second adjustable impedance constitute parallel circuit, send words output lattice network again with
Aircraft instrument telecommunication circuit is connected；
The called input lattice network includes receiver, the 3rd adjustable impedance and the 4th adjustable impedance, the receiver
With the 3rd adjustable impedance constitute series circuit, then with the 4th adjustable impedance constitute parallel circuit, called input lattice network again with
Aircraft instrument PAC circuit is connected.
Beneficial effects of the present invention：Because the magneto microphone and electromagnetic type in aircraft ground service staff's helmet are called
The corresponding Linear Network device of series and parallel in device circuit, electromagnetic type send the ﹑ impedances of receiver and the sensitivity can to realize that system is adjusted.Make it
Accomplish to match with aircraft instrument telecommunication circuit and PAC circuit impedance, working sensitivity reaches satisfied effect, it is to avoid contact sound
Sound discontinuously or diminishes, or even produces noise or the phenomenon such as utter long and high-pitched sounds.
Brief description of the drawings
Fig. 1 is that magneto microphone circuit of the present invention is connected block diagram with aircraft instrument telecommunication circuit.
Fig. 2 is electromagnetic telephone circuit of the present invention and aircraft instrument PAC circuit connection block diagram.
Specific embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings.Following examples are merely to illustrate this hair
It is bright, it is not limited to protection scope of the present invention.
As illustrated in fig. 1 and 2, a kind of electromagnetic type send ﹑ impedances of receiver of the invention and sensitivity ganged circuit, it includes sending
Words output lattice network and called input lattice network；
Transmitter S1With adjustable impedance Z1Composition series circuit, then with adjustable impedance Z2Composition parallel circuit, so as to constitute send
Words output lattice network, send words output lattice network to be connected with aircraft instrument telecommunication circuit again；
First, the situation that transmitter circuit impedance system is adjusted：
If：When frequency is 1000HZ, Zs1It is transmitter S1Impedance, Z01It is aircraft instrument telecommunication circuit D1Input resistance
It is anti-, ZS01It is adjustable impedance Z1And Z2With transmitter S1Impedance ZS1Composition series and parallel exports the total impedance of lattice network.
Then：
As requested：When frequency is 1000HZ, ZS01With Z01It is equal,
That is, ZS01=Z01
Have：
If M is transmitter S1Impedance ZS1With aircraft instrument telecommunication circuit D1Input impedance Z01Proportionality coefficient, have M=
ZS1/Z01。
Three kinds of situations are divided to make brief analysis below：
(A) M=1, i.e. Z are worked asS1=Z01When, Z1→ 0, Z2→∞；
(B) as M ＞ 1, i.e. ZS1＞ Z01When, Z1→ 0,1. solved according to equation：
According to ZS1With Z012. numerical value known conditions and equation can just solve Z2Numerical value；
(C) as M ＜ 1, i.e. ZS1＜ Z01When, now there are two kinds of situations：
A () works as ZS1+Z1=Z01, Z21. → ∞, solve according to equation：Z1=Z01—ZS1；
B () is as (ZS1+Z1) ＞ Z01, Z1＞ 0, Z2＞ 0, according to equation 1.：Z1With Z2Have without array solution.This Z1With Z2Meeting
The situation for whetheing there is array solution shows that transmitter impedance system timing may be selected optimal values.
2nd, the adjustable situation of sensitivity of telephone transmitter：
If frequency is 1000HZ, ES1It is transmitter S1Output sensitivity, E01It is aircraft equipment circuit D1Input spirit
Sensitivity, N is output sensitivity ES1With aircraft equipment circuit D1Input sensitivity E01Proportionality coefficient have：N=ES1/E01；
Three kinds of situations are now divided to carry out brief analysis：
(1) N=1, transmitter S are worked as1Output sensitivity ES1With aircraft equipment circuit D1Input sensitivity E01It is equal, i.e. ES1=
E01, now require Z1→ 0, Z2→∞；
(2) as N ＞ 1, transmitter S1Output sensitivity ES1Words D is sent higher than aircraft equipment circuit1Input sensitivity E01, i.e. ES1
＞ E01, instrument telecommunication circuit D may be caused1It is unstable.Such as produce noise, or even the phenomenon such as utter long and high-pitched sounds.Can now unite tune impedance Z1
And Z2, it is desirable to Z1Tune up, Z2Turn down；
(3) as N ＜ 1, i.e. ES1＜ E01When, transmitter S1Output sensitivity ES1It is too low to cause instrument telecommunication circuit D1No
Stabilization, gets in touch with audio discontinuity or diminishes.Transmitter S will now be changed1.
Receiver S2With adjustable impedance Z3Composition series circuit, then with adjustable impedance Z4Composition parallel circuit, so as to constitute receive
Words input lattice network, called input lattice network is connected with aircraft instrument PAC circuit again；
If frequency is 1000HZ, ZS2It is receiver S2Impedance, Z02It is instrument PAC circuit D2Output impedance, ZS02
It is adjustable impedance Z3And Z4With receiver S2Impedance ZS2Constitute the input lattice network total impedance of series and parallel.
Then：
As requested：When frequency is 1000HZ, ZS02With Z02It is equal, i.e. ZS02=Z02,
Have：
3. 1. compared with equation by equation, equation model is identical, its analysis method is identical with above-mentioned analysis method.Therefore no longer
Repeat.
From analysis above, when magneto microphone can not reach in aircraft instrument telecommunication circuit work middle impedance
Match somebody with somebody, when working sensitivity does not reach satisfied effect, adjustable impedance Z can be adjusted by uniting1And Z2To reach magneto microphone in instrument
The matching of device circuit work middle impedance, the effect of working sensitivity satisfaction.
When electromagnetic telephone can not reach matching in aircraft instrument PAC circuit work middle impedance, working sensitivity is not up to
During to satisfied effect, by adjusting adjustable impedance Z3And Z4Worked in aircraft instrument PAC circuit to reach electromagnetic telephone
Middle impedance matching, the effect of working sensitivity satisfaction.
Adjustable impedance Z1、Z2、Z3And Z4Using linear element, so adjust more convenient, it is to avoid contact audio discontinuity or change
It is small, or even produce noise or the phenomenon such as utter long and high-pitched sounds.Stability to ensureing telecommunication circuit and the PAC circuit work of instrument on aircraft
It is highly beneficial.
The present invention according to the electric network maturity of technology, aircraft ground service staff's helmet magneto microphone and
The corresponding Linear Network device of series and parallel in electromagnetic telephone circuit, makes the electromagnetic type send ﹑ impedances of receiver be realized with sensitivity
System is adjusted.
Claims (1)
1. a kind of electromagnetic type send ﹑ impedances of receiver and sensitivity ganged circuit, it is characterised in that：It includes sending words output network electricity
Road and called input lattice network；
It is described to send the words output lattice network to include transmitter, the first adjustable impedance and the second adjustable impedance, the transmitter and the
One adjustable impedance constitute series circuit, then with the second adjustable impedance constitute parallel circuit, send words output lattice network again with aircraft
Instrument telecommunication circuit is connected；
The called input lattice network includes receiver, the 3rd adjustable impedance and the 4th adjustable impedance, the receiver and the
Three adjustable impedances constitute series circuit, then with the 4th adjustable impedance constitute parallel circuit, called input lattice network again with aircraft
Instrument PAC circuit is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611080326.5A CN106792347A (en) | 2016-11-30 | 2016-11-30 | A kind of electromagnetic type send ﹑ impedances of receiver and sensitivity ganged circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611080326.5A CN106792347A (en) | 2016-11-30 | 2016-11-30 | A kind of electromagnetic type send ﹑ impedances of receiver and sensitivity ganged circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106792347A true CN106792347A (en) | 2017-05-31 |
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ID=58901227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611080326.5A Pending CN106792347A (en) | 2016-11-30 | 2016-11-30 | A kind of electromagnetic type send ﹑ impedances of receiver and sensitivity ganged circuit |
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| Country | Link |
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| CN (1) | CN106792347A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0379199A (en) * | 1989-08-23 | 1991-04-04 | Brother Ind Ltd | Transmitter/receiver |
| CN2445517Y (en) * | 2000-07-18 | 2001-08-29 | 江西洪都航空工业集团有限责任公司 | Protective impedance changeable microphone and receiver set |
| CN102355222A (en) * | 2011-06-17 | 2012-02-15 | 上海华为技术有限公司 | Impedance matching system and impedance matching device |
| CN202818556U (en) * | 2012-08-29 | 2013-03-20 | 东莞泉声电子有限公司 | Noise reduction earphone |
| CN103634016A (en) * | 2012-08-20 | 2014-03-12 | 宏达国际电子股份有限公司 | Tunable impedance matching circuit |
| CN204616065U (en) * | 2015-04-28 | 2015-09-02 | 中国人民解放军海军航空工程学院青岛校区 | Aircraft electrophone testing circuit |
-
2016
- 2016-11-30 CN CN201611080326.5A patent/CN106792347A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0379199A (en) * | 1989-08-23 | 1991-04-04 | Brother Ind Ltd | Transmitter/receiver |
| CN2445517Y (en) * | 2000-07-18 | 2001-08-29 | 江西洪都航空工业集团有限责任公司 | Protective impedance changeable microphone and receiver set |
| CN102355222A (en) * | 2011-06-17 | 2012-02-15 | 上海华为技术有限公司 | Impedance matching system and impedance matching device |
| CN103634016A (en) * | 2012-08-20 | 2014-03-12 | 宏达国际电子股份有限公司 | Tunable impedance matching circuit |
| CN202818556U (en) * | 2012-08-29 | 2013-03-20 | 东莞泉声电子有限公司 | Noise reduction earphone |
| CN204616065U (en) * | 2015-04-28 | 2015-09-02 | 中国人民解放军海军航空工程学院青岛校区 | Aircraft electrophone testing circuit |
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Application publication date: 20170531 |