CN109996150A - A kind of ground proximity warning system multichannel outputting alarm sound circuit - Google Patents
A kind of ground proximity warning system multichannel outputting alarm sound circuit Download PDFInfo
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- CN109996150A CN109996150A CN201810002422.0A CN201810002422A CN109996150A CN 109996150 A CN109996150 A CN 109996150A CN 201810002422 A CN201810002422 A CN 201810002422A CN 109996150 A CN109996150 A CN 109996150A
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- audio
- warning system
- proximity warning
- resistance
- filter
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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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Alarm Systems (AREA)
Abstract
The present invention relates to a kind of ground proximity warning system multichannel outputting alarm sound circuits, include, primary processor U1, audio codec U2, preamplifier U3, audio-frequency amplifier U4, balanced line driver U5, audio-frequency transformer T1.Also include, high-pass filtering circuit A1, it is made of filter capacitor C4 and filter resistance R4, for filtering out the DC component and other low-frequency noises of the audio signal of speech chip output, the first termination preamplifier U3 of filter capacitor C4, the second end of filter capacitor C4 and the first end of filter resistance R4 connect audio-frequency amplifier U4, the second end ground connection of filter resistance R4.The present invention has the advantages that anti-interference ability of the alert sound circuit sound intermediate frequency signal in transmission process is stronger, there is the voice audio signals amplitude between ground proximity warning system and interphone, impedance, be isolated and the electric requirements such as difference.
Description
Technical field
The present invention relates to a kind of circuits in airborne Aerial Electronic Equipment field, more particularly, to a kind of ground proximity warning system multichannel
Outputting alarm sound circuit.
Background technique
Whether ground proximity warning system is a kind of aircraft airborne Aerial Electronic Equipment, judge in danger zone to aircraft, when
Aircraft hit ground it is dangerous when to cockpit crew provide the alarm of the combining forms such as voice, light and gound-mapping, avoid hitting mountain,
Born accident occurs, and ensures flight safety.According to different dangerous situations, ground proximity warning system exportable ten is several different close
Ground alerts voice.
The alarm voice of ground proximity warning system passes through alarm sound circuit output, the alarm voice audio signals of output a to left side
Right driver and navigator's interphone.Existing Distal promoter sound circuit only exports alerts voice all the way, and alerts language
Sound needs to be recorded in advance in phonetic storage chip, it has not been convenient to change in real time；Alarm sound circuit sound intermediate frequency signal is being transmitted across
Anti-interference ability in journey is poor, without the voice audio signals amplitude between ground proximity warning system and interphone, resistance
The electric requirements such as anti-, isolation and difference.
Summary of the invention
The present invention provides a kind of ground proximity warning system multichannel outputting alarm sound circuit.
To achieve the goals above, the technical scheme of the present invention is realized as follows: a kind of ground proximity warning system multichannel
Outputting alarm sound circuit includes, primary processor U1, audio codec U2, preamplifier U3, audio-frequency amplifier U4,
Balanced line driver U5, audio-frequency transformer T1, which is characterized in that also include high-pass filtering circuit A1, by filter capacitor
C4 and filter resistance R4 composition, the DC component and other low-frequency noises of the audio signal for filtering out speech chip output, filter
The first termination preamplifier U3 of wave capacitor C4, the second end of filter capacitor C4 and the first end of filter resistance R4 connect audio
The second end of amplifier U4, filter resistance R4 are grounded.
The voltage amplification factor of audio amplifier U4 is configured by configuration resistance R2, first end, the second end point of resistance R2
It is not connect with two RG pins of audio-frequency amplifier U4.
Primary processor U1 uses the ADS-BF561 of Analog Device company production；Audio codec U2 is Analog
The AD1934 of Device company production；Preamplifier U3 is the OP275 of Analog Device company production；Audio-frequency amplifier
U4 is the SSM2019 of Analog Device company production；Balanced line driver U5 is the production of Analog Device company
SSM2142。
Compared with prior art, advantages of the present invention includes at least following: passing through I2S bus sends Distal promoter voice
To audio codec, maximum exportable 8 tunnel of frequency codec alerts voice, and lamprophonia, sound quality is high, and volume is adjustable, control
Simply, meet the requirement that ground proximity warning system exports a variety of different alarm voices；Include filtering, amplification, single-ended slip in circuit
Point, the functions such as impedance matching and isolation, Aerial Electronic Equipment can be met to the electric requirement of audio interface.
Detailed description of the invention
Fig. 1 is the alarm speech production schematic diagram of one embodiment of the invention.
Fig. 2 is alarm speech signal handling principle figure in one embodiment of the invention.
Specific embodiment
It elaborates with reference to the accompanying drawings and examples to the present invention.
As shown in Figure 1, the present invention includes primary processor U1, audio codec U2, preamplifier U3, high-pass filtering electricity
Road A1, audio-frequency amplifier U4, balanced line driver U5, audio-frequency transformer T1, amplification factor configure resistance R2.The high pass
Filter circuit A1 includes filter capacitor C4 and filter resistance R4.
Primary processor U1 uses the ADS-BF561 of Analog Device company production；Audio codec U2 is Analog
The AD1934 of Device company production；Preamplifier U3 is the OP275 of Analog Device company production；Audio-frequency amplifier
U4 is the SSM2019 of Analog Device company production；Balanced line driver U5 is the production of Analog Device company
SSM2142.The supply voltage of audio codec U2 is+3.3V, and preamplifier U3, audio-frequency amplifier U4 and balanced circuit drive
The supply voltage of dynamic device U4 is ± 15V.
Primary processor U1 is connect with audio codec U2 by spi bus；Alarm voice is previously segmented into recording and stores
In flash, primary processor U1 reads alarm voice messaging in flash according to demand and passes through I2S bus is delivered to audio and compiles solution
Code device U2；The audio signal of audio codec U2 output is that single-ended voltage signal is delivered to preamplifier；
High-pass filtering circuit A1 is made of a filter capacitor C4 and a filter resistance R4, for filtering out speech chip output
The DC component of audio signal and other low-frequency noises；The voice output pin (No. 1 foot) of audio codec U3 passes through resistance
R3 is connect with a pin of filter capacitor C4, and another pin of filter capacitor C4 and a pin of filter resistance R4 connect
Connect, another pin of filter resistance R4 ground connection, the tie point of C4 and R4 simultaneously with the input pin of audio-frequency amplifier U4 (No. 3
Foot) connection；
The voltage amplification factor of audio-frequency amplifier U4 is configured by configuration resistance R2, and two pins of R2 amplify with audio respectively
Two RG pins of device connect (No. 1 foot and No. 8 feet)；If amplification factor is N, then the resistance value R of R2 is { 10/ (N-1) } k Ω；
The output pin (No. 6 feet) of audio-frequency amplifier U4 is connect with the input pin (No. 4 feet) of balanced line driver U5, balance
It is 600 Ω difference audio signals that single-ended audio signal is converted to impedance by line driver U5, while voltage magnitude is amplified one
Times；
Two difference output pins (No. 1 foot and No. 8 feet) of balanced line driver U5 and the input terminal of audio-frequency transformer T1 connect
It connects, audio-frequency transformer T1 plays the role of impedance matching and insulation blocking, and impedance transformation ratio 600:N, wherein N is load end
The impedance of interface requirement, to meet the differentiated voice audio signal output of amplitude and resistance requirements.
Embodiments of the present invention are only expressed above, and the description thereof is more specific and detailed, but can not therefore understand
For the limitation to patent of invention range.It should be pointed out that for those of ordinary skill in the art, not departing from this hair
Under the premise of bright design, various modifications and improvements can be made, and these are all within the scope of protection of the present invention.Therefore, this hair
The scope of protection shall be subject to the appended claims for bright patent.
Claims (3)
1. a kind of ground proximity warning system multichannel outputting alarm sound circuit, includes primary processor U1, audio codec
U2, preamplifier U3, audio-frequency amplifier U4, balanced line driver U5, audio-frequency transformer T1, which is characterized in that also include
Have, high-pass filtering circuit A1 is made of filter capacitor C4 and filter resistance R4, for filtering out the audio letter of speech chip output
Number DC component and other low-frequency noises, filter capacitor C4 first termination preamplifier U3, the second of filter capacitor C4
The first end of end and filter resistance R4 connect audio-frequency amplifier U4, the second end ground connection of filter resistance R4.
2. a kind of ground proximity warning system multichannel outputting alarm sound circuit according to claim 1, which is characterized in that sound
The voltage amplification factor of audio amplifier U4 is configured by configuration resistance R2, the first end of resistance R2, second end respectively with audio
Two RG pins of amplifier U4 connect.
3. a kind of ground proximity warning system multichannel outputting alarm sound circuit according to claim 1, which is characterized in that main
Processor U1 uses the ADS-BF561 of Analog Device company production；Audio codec U2 is Analog Device public
Take charge of the AD1934 of production；Preamplifier U3 is the OP275 of Analog Device company production；Audio-frequency amplifier U4 is
The SSM2019 of Analog Device company production；Balanced line driver U5 is the production of Analog Device company
SSM2142。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810002422.0A CN109996150A (en) | 2018-01-02 | 2018-01-02 | A kind of ground proximity warning system multichannel outputting alarm sound circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810002422.0A CN109996150A (en) | 2018-01-02 | 2018-01-02 | A kind of ground proximity warning system multichannel outputting alarm sound circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109996150A true CN109996150A (en) | 2019-07-09 |
Family
ID=67128819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810002422.0A Pending CN109996150A (en) | 2018-01-02 | 2018-01-02 | A kind of ground proximity warning system multichannel outputting alarm sound circuit |
Country Status (1)
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| CN (1) | CN109996150A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111182157A (en) * | 2019-12-30 | 2020-05-19 | 泰弗思科技(安徽)有限公司 | Isolated four-wire call one-to-two circuit |
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| US20030055519A1 (en) * | 2001-09-20 | 2003-03-20 | Goldberg Mark L. | Digital audio system |
| CN2527476Y (en) * | 2001-11-02 | 2002-12-25 | 盘锦昌明电子有限责任公司 | Multifunctional intelligent hoister panel |
| CN1538150A (en) * | 2003-10-23 | 2004-10-20 | 武汉虹信通信技术有限责任公司 | Radio regimen alarm system based on public mobile communicaton network |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111182157A (en) * | 2019-12-30 | 2020-05-19 | 泰弗思科技(安徽)有限公司 | Isolated four-wire call one-to-two circuit |
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Application publication date: 20190709 |