CN209358778U - A kind of hearing aid low-voltage alarm circuit - Google Patents
A kind of hearing aid low-voltage alarm circuit Download PDFInfo
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- CN209358778U CN209358778U CN201920128167.4U CN201920128167U CN209358778U CN 209358778 U CN209358778 U CN 209358778U CN 201920128167 U CN201920128167 U CN 201920128167U CN 209358778 U CN209358778 U CN 209358778U
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Abstract
The utility model relates to hearing aid technologies, disclose a kind of hearing aid low-voltage alarm circuit, including voltage input module and linear voltage stabilization module and alarm module, voltage input module includes power supply and the voltage reduction module with power supply coupling, the output end of voltage reduction module and the input terminal of linear voltage stabilization module couple, the output end and alarm module of linear voltage stabilization module couple, linear voltage stabilization module output voltage and voltage input module institute's input voltage is set to constitute linear relationship, to make voltage input module when electricity is lower, linear voltage stabilization module output voltage reaches the alert if of triggering alarm module, patient is reminded timely to be charged in advance, the case where to avoid hearing aid from powering off suddenly, promote the safety in utilization and reliability of hearing aid.
Description
Technical field
The utility model relates to hearing aid technologies, more specifically, it relates to which a kind of hearing aid is alarmed with low-voltage
Circuit.
Background technique
Hearing aid is a miniature loudspeaker, mainly by microphone, amplifier, earphone, power module and control module five
Part forms.Originally the sound that can't hear can be expanded, recycles the residual hearing for the person that listens to barrier, sound is enable to be sent to greatly
Brain auditory center, and feel sound.
Existing hearing aid, as power supply, is supplied using rechargeable lithium battary to other each electricity consumption parts
Electricity, one stationary value of voltage for mostly using power module of voltage regulation to export it, will not be because of the variation of lithium battery in a certain range
And variation is generated, improve the stability of power supply.
However, most of use scopes of lithium battery are 3.2V ~ 4.2V, and in use, supply voltage can be by
It is decrescence small, and the biggish voltage reduction of amplitude can be generated after a certain time, in the operating voltage lower than the voltage stabilizing chip used
Afterwards, hearing aid can be made to power off suddenly.And the unexpected power-off of hearing aid is and its unsafe, possible patient is at this time just in road row
It walks or is driving, can't hear extraneous sound, therefore there is very big security risk.
Utility model content
In view of the above-mentioned problems, the purpose of this utility model is to provide a kind of hearing aid low-voltage alarm circuit, tool
There is the advantages of can promoting hearing aid safety in utilization and reliability.
The above-mentioned purpose of utility model of the utility model has the technical scheme that
A kind of hearing aid low-voltage alarm circuit, including voltage input module and linear voltage stabilization module and alarm mould
Block, the voltage input module include power supply and with the power supply coupling voltage reduction module, the voltage reduction module
Output end and the input terminal of the linear voltage stabilization module couple, the output end of the linear voltage stabilization module and the alarm module coupling
It connects.
Through the above technical solutions, linear voltage stabilization module output voltage and voltage input module institute's input voltage is made to constitute line
Sexual intercourse, to make voltage input module when electricity is lower, linear voltage stabilization module output voltage reaches triggering alarm module
Alert if reminds patient timely to be charged in advance, so that the case where avoiding hearing aid from powering off suddenly, promotes hearing aid
The safety in utilization and reliability of device.
The utility model is further arranged to: the linear voltage stabilization module include negative voltage linear voltage regulator and with it is described
The regulation component of negative voltage linear voltage regulator coupling.
The utility model is further arranged to: the regulation component includes the electricity with negative voltage linear voltage regulator coupling
Hinder R4, resistance R5, capacitor C5, capacitor C6；
One end of the resistance R4 couples the output end of the voltage reduction module, the other end couple the resistance R5 one end and
The negative voltage linear voltage regulator, the resistance R5 couple the negative voltage linear voltage regulator far from one end of the resistance R4；
One end of the capacitor C5 couples the junction of the resistance R4 and the resistance R5, and the other end couples the negative electricity
Press linear voltage regulator；
One end with the resistance R4 far from the resistance R5 and the resistance R5 are remote respectively at the both ends of the capacitor C6
One end coupling from the resistance R4.
Through the above technical solutions, output voltage noise is smaller, and quality is higher using negative voltage linear voltage regulator, capacitor
C6 can eliminate noise in circuit, and R4 and R5 can obtain different Amplitude of Hypotensive by configuring different resistance values.
The utility model is further arranged to: the output end of the voltage reduction module is coupled with voltage stabilization module, the electricity
Stable module and the input terminal of the linear voltage stabilization module is pressed to couple.
The utility model is further arranged to: the voltage reduction module includes resistance R1, resistance R2, resistance R3, capacitor C1；
One end of the resistance R1 and the anode of the power supply couple, one end coupling of the other end and the resistance R2
It connects, the one end of the resistance R2 far from the resistance R1 and the cathode of the power supply and one end coupling of the resistance R3
It connects, the other end ground connection of the resistance R3；
One end of the capacitor C1 is coupled with the place of electrical connection of the resistance R1 and the resistance R2, the other end and the confession
The cathode of power supply couples.
Through the above technical solutions, decompression is realized by the voltage of resistance R2 and resistance R1 voltage division processing power supply, for
Linear voltage stabilization module normal use.
The utility model is further arranged to: the voltage stabilization module includes amplifier U1；
The non-inverting input terminal of the amplifier U1, the amplifier U1 are coupled at the electrical connection of the resistance R1 and the resistance R2
Inverting input terminal couple the output end of the amplifier U1, the input of the output end of the amplifier U1 and the linear voltage stabilization module
End coupling.
Through the above technical solutions, being made of voltage follower circuit amplifier U1 and its circuit, two lateral circuits of isolation are realized
Meanwhile guaranteeing that input voltage is consistent with output voltage.
The utility model is further arranged to: the both ends coupled in parallel of the power supply has TVS diode D1.
Through the above technical solutions, providing protection to circuit by TVS diode D1, make the voltage clamp of two interpolars in one
Safety value is effectively protected the precision components in electronic circuit from the destruction of surge pulse.
The utility model is further arranged to: the alarm module include resistance R6, resistance R7, amplifier U2, triode Q1,
Alarm power supply VCC and alarm unit；
One end of the resistance R6 couples the alarm power supply VCC, and the other end is grounded after coupling the resistance R7, the electricity
The reverse input end of the amplifier U2, the non-inverting input terminal coupling of the amplifier U2 are coupled at the coupling of the resistance R6 and resistance R7
The output end of the linear voltage stabilization module；
The base stage of the output end of the amplifier U2 and the triode Q1 couple, the collector of the triode Q1 with it is described
Alarm unit coupling, the emitter and the alarm unit of the triode Q1 couple.
Through the above technical solutions, when the output end output voltage of linear voltage stabilization module is less than the coupling of resistance R6 and resistance R7
Place's voltage is connect, the output end of amplifier U2 exports high level, triode Q1 is connected, and starts alarm unit, and realization mentions patient
It wakes up.
Compared with prior art, the utility model has the beneficial effects that
(1) voltage input module and its output voltage is made to constitute linear relationship by linear voltage stabilization module, to make voltage
For input module when electricity is lower, linear voltage stabilization module output voltage reaches the alert if of triggering alarm module, can mention in advance
The patient that wakes up timely is charged, so that the case where avoiding hearing aid from powering off suddenly, promotes the safety in utilization of hearing aid
And reliability；
(2) by using negative voltage linear voltage regulator, the negative voltage generated is the ground voltage progress pressure stabilizing relative to 0V,
It can produce low-down noise and accurately output voltage in this way, be conducive to the high fidelity output of hearing aid.
Detailed description of the invention
Fig. 1 is voltage input module circuit diagram in the utility model embodiment；
Fig. 2 is linear Voltage stabilizing module circuit diagram in the utility model embodiment；
Fig. 3 is alarm module circuitry schematic diagram in the utility model embodiment.
Appended drawing reference: 1, voltage input module；11, power supply；12, voltage reduction module；2, linear voltage stabilization module；21, it bears
Voltage linear voltage-stablizer；22, regulation component；3, alarm module.
Specific embodiment
With reference to the accompanying drawings and examples, the utility model is described in detail.
A kind of hearing aid low-voltage alarm circuit, is applied in hearing aid, including voltage input module 1(is referring to Fig. 1)
Referring to fig. 2 with linear voltage stabilization module 2() and alarm module 3(is referring to Fig. 3), voltage input module 1 includes 11 He of power supply
The voltage reduction module 12 coupled with power supply 11, linear voltage stabilization module 2 include negative voltage linear voltage regulator 21 and and negative voltage
The regulation component 22 that linear voltage regulator 21 couples.
As shown in Figure 1, what the voltage drop that power supply 11 provides can be worked normally down to negative voltage linear voltage regulator 21
Voltage status, make linear voltage stabilization module 2 output with the linear voltage of 1 input voltage of voltage input module, can and
When, the linear output voltage state for reflecting power supply 11, to make voltage input module 1 when electricity is lower, when
The alert if for reaching triggering alarm module 3, can remind patient timely to be charged, so that hearing aid be avoided to break suddenly in advance
The situation of electricity occurs, and promotes the safety in utilization and reliability of hearing aid.
Wherein, power supply 11 is lithium battery, and output voltage range is between 3.4V ~ 4.2V, using model
The negative voltage linear voltage regulator 21 of ADP7183, the good characteristic with low noise, high PSRR, is very suitable to hearing aid
This electronic device for noise-sensitive.
As shown in Figure 1, voltage reduction module 12 includes resistance R1, resistance R2, resistance R3, capacitor C1, one end of resistance R1 and confession
The anode of power supply 11 couples, and one end of the other end and resistance R2 couple.Resistance R2 one end and power supply far from resistance R1
One end coupling of 11 cathode and resistance R3, the other end ground connection of resistance R3.One end of capacitor C1 and resistance R1 and resistance R2
Electrical connection at couple, the cathode of the other end and power supply 11 couples.
As shown in Figure 1, voltage stabilization module includes amplifier U1, one end of the cathode of the separate power supply 11 of capacitor C1 with
The non-inverting input terminal of amplifier U1 couples, the output end of the inverting input terminal coupling amplifier U1 of amplifier U1, the output end of amplifier U1 with
The input terminal of linear voltage stabilization module 2 couples.So that amplifier U1 and its circuit is constituted voltage follower circuit, isolation power supply 11 with
While linear voltage stabilization module 2, guarantee that the input voltage of amplifier U1 is consistent with the output voltage of amplifier U1.And power supply 11
Both ends coupled in parallel has TVS diode D1, and TVS diode is similar to the working principle of common zener diode, if be higher than
Breakdown voltage on mark, TVS diode will be connected, when the two poles of the earth are by reversed transient state high energy impact events, with extremely short speed
The high impedance of its two interpolar is become Low ESR, while absorbing up to thousands of watts of surge power by degree.With zener diode phase
Than TVS diode has higher current capacity, makes the voltage clamp of two interpolars in a safety value, is effectively protected electricity
Precision components in sub-line road promote circuit stability from the destruction of surge pulse.
As shown in Fig. 2, regulation component 22 includes resistance R4, resistance R5, capacitor C5, capacitor C6, one end of resistance R4 is coupled
The output end of amplifier U1, one end of other end coupling resistance R5 and the pin 6 of negative voltage linear voltage regulator 21, resistance R5 is far from electricity
Hinder the pin 3 of one end coupling negative voltage linear voltage regulator 21 of R4, the connection of one end the coupling resistance R4 and resistance R5 of capacitor C5
Place is simultaneously coupled with the pin of negative voltage linear voltage regulator 21 4, and the other end couples 21 volume pin 3 of negative voltage linear voltage regulator, capacitor
The both ends of C6 are coupled with the pin 6 of negative voltage linear voltage regulator 21 and pin 3 respectively.The pin of negative voltage linear voltage regulator 21
1 and pin 2 couple output end, and be coupled with capacitor C24, the other end ground connection of capacitor C24.Negative voltage linear voltage regulator 21 draws
Foot 6 has been respectively coupled to capacitor C27 and capacitor C28, capacitor C27 ground connection, and capacitor C28 couples the pin of negative voltage linear voltage regulator 21
7, pin 6 and pin 8 ground connection of negative voltage linear voltage regulator 21.Capacitor C6 can eliminate noise in circuit, and R4 and R5 can pass through
It configures different resistance values and obtains different Amplitude of Hypotensive.
As shown in figure 3, alarm module 3 include resistance R6, resistance R7, amplifier U2, triode Q1, alarm power supply VCC and
Alarm unit, one end of resistance R6 are grounded after coupling alarm power supply VCC, other end coupling resistance R7, resistance R6 and resistance R7's
The reverse input end of amplifier U2, the output end of the non-inverting input terminal coupling linear voltage stabilization module 2 of amplifier U2, amplifier are coupled at coupling
The output end of U2 and the base stage of triode Q1 couple, and the collector and alarm unit of triode Q1 couples, the transmitting of triode Q1
Pole and alarm unit couple.
The voltage at the coupling that the output end output voltage of linear voltage stabilization module 2 is less than resistance R6 and resistance R7, amplifier U2
Output end export high level, make triode Q1 be connected, start alarm unit, alarm unit can be used Microspeaker or shine
Diode, to remind patient to charge in time.
The above is only the preferred embodiment of the utility model, and the protection scope of the utility model is not limited merely to
Above-described embodiment, technical solution belonging to the idea of the present invention belong to the protection scope of the utility model.It should refer to
Out, for those skilled in the art, it is without departing from the principle of the utility model it is several improvement and
Retouching, these improvements and modifications also should be regarded as the protection scope of the utility model.
Claims (8)
1. a kind of hearing aid low-voltage alarm circuit, which is characterized in that including voltage input module (1) and linear voltage stabilization module
(2) and alarm module (3), the voltage input module (1) include power supply (11) and with the power supply (11) coupling
The input terminal of the voltage reduction module (12) connect, the output end of the voltage reduction module (12) and the linear voltage stabilization module (2) couples, institute
The output end and the alarm module (3) for stating linear voltage stabilization module (2) couple.
2. hearing aid low-voltage alarm circuit according to claim 1, which is characterized in that the linear voltage stabilization module
It (2) include negative voltage linear voltage regulator (21) and the regulation component (22) with the negative voltage linear voltage regulator (21) coupling.
3. hearing aid low-voltage alarm circuit according to claim 2, which is characterized in that regulation component (22) packet
Include resistance R4, the resistance R5, capacitor C5, capacitor C6 with the negative voltage linear voltage regulator (21) coupling；
One end of the resistance R4 couples the output end of the voltage reduction module (12), the other end couple the resistance R5 one end and
The negative voltage linear voltage regulator (21), the resistance R5 couple the negative voltage linear voltage stabilization far from one end of the resistance R4
Device (21)；
One end of the capacitor C5 couples the junction of the resistance R4 and the resistance R5, and the other end couples the negative electricity crimping
Property voltage-stablizer (21)；
The both ends of the capacitor C6 respectively one end with the resistance R4 far from the resistance R5 and the resistance R5 far from institute
State one end coupling of resistance R4.
4. hearing aid low-voltage alarm circuit according to claim 1, which is characterized in that the voltage reduction module (12)
Output end is coupled with voltage stabilization module, the input terminal coupling of the voltage stabilization module and the linear voltage stabilization module (2).
5. hearing aid low-voltage alarm circuit according to claim 4, which is characterized in that voltage reduction module (12) packet
Include resistance R1, resistance R2, resistance R3, capacitor C1；
One end of the resistance R1 and the anode of the power supply (11) couple, one end coupling of the other end and the resistance R2
It connects, the one end of the resistance R2 far from the resistance R1 and the cathode of the power supply (11) and one end of the resistance R3
Coupling, the other end ground connection of the resistance R3；
One end of the capacitor C1 is coupled with the place of electrical connection of the resistance R1 and the resistance R2, the other end and power supply electricity
The cathode in source (11) couples.
6. hearing aid low-voltage alarm circuit according to claim 5, which is characterized in that the voltage stabilization module packet
Include amplifier U1；
The non-inverting input terminal of the amplifier U1 is coupled at the electrical connection of the resistance R1 and the resistance R2, the amplifier U1's is anti-
Phase input terminal couples the output end of the amplifier U1, the input of the output end of the amplifier U1 and the linear voltage stabilization module (2)
End coupling.
7. hearing aid low-voltage alarm circuit according to claim 6, which is characterized in that the power supply (11)
Both ends coupled in parallel has TVS diode D1.
8. hearing aid low-voltage alarm circuit according to claim 1, which is characterized in that alarm module (3) packet
Include resistance R6, resistance R7, amplifier U2, triode Q1, alarm power supply VCC and alarm unit；
One end of the resistance R6 couples the alarm power supply VCC, and the other end is grounded after coupling the resistance R7, the resistance R6
The reverse input end of the amplifier U2 is coupled at coupling with the resistance R7, described in the non-inverting input terminal coupling of the amplifier U2
The output end of linear voltage stabilization module (2)；
The base stage of the output end of the amplifier U2 and the triode Q1 couple, the collector of the triode Q1 and the alarm
Unit coupling, the emitter and the alarm unit of the triode Q1 couple.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920128167.4U CN209358778U (en) | 2019-01-24 | 2019-01-24 | A kind of hearing aid low-voltage alarm circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920128167.4U CN209358778U (en) | 2019-01-24 | 2019-01-24 | A kind of hearing aid low-voltage alarm circuit |
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| Publication Number | Publication Date |
|---|---|
| CN209358778U true CN209358778U (en) | 2019-09-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920128167.4U Active CN209358778U (en) | 2019-01-24 | 2019-01-24 | A kind of hearing aid low-voltage alarm circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109769185A (en) * | 2019-01-24 | 2019-05-17 | 艺尔康听力科技（上海）有限公司 | A kind of hearing aid low-voltage alarm circuit |
-
2019
- 2019-01-24 CN CN201920128167.4U patent/CN209358778U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109769185A (en) * | 2019-01-24 | 2019-05-17 | 艺尔康听力科技（上海）有限公司 | A kind of hearing aid low-voltage alarm circuit |
| CN109769185B (en) * | 2019-01-24 | 2024-05-07 | 艺尔康听力科技（上海）有限公司 | Low-voltage alarm circuit for hearing aid |
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