CN105491484A - Hearing assistance device - Google Patents
Hearing assistance device Download PDFInfo
- Publication number
- CN105491484A CN105491484A CN201510992686.1A CN201510992686A CN105491484A CN 105491484 A CN105491484 A CN 105491484A CN 201510992686 A CN201510992686 A CN 201510992686A CN 105491484 A CN105491484 A CN 105491484A
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- China
- Prior art keywords
- terminal
- resistor
- coupled
- voltage
- switch
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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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2420/00—Details of connection covered by H04R, not provided for in its groups
- H04R2420/03—Connection circuits to selectively connect loudspeakers or headphones to amplifiers
Abstract
The invention discloses a hearing assistance device, comprising a microphone, a first capacitor and a second capacitor. The anode terminal of the microphone is connected to a first resistor and the cathode terminal is connected to a cathode of a power supply; the first resistor is connected to an earphone jack which is connected to the anode of the power supply; the first capacitor is connected to a common terminal of the microphone and the first resistor, and the second terminal of the first capacitor is connected to a second resistor which is connected to a first terminal of an adjustable resistor; the second terminal of the adjustable resistor is connected to the input terminal of a COMS amplifier; the output terminal of the COMS amplifier is connected to a sliding terminal of the adjustable resistor through a third resistor; the first terminal of the second capacitor is connected to the output terminal of the COMS amplifier; the second terminal of the second capacitor is connected to a base electrode of a PNP transistor; the collection electrode of the PNP transistor is connected to the anode of the power supply; and the emission electrode of the PNP transistor is connected to the cathode of the power supply and is connected to the base electrode of a fourth resistor.
Description
Technical field
The present invention relates to electronic technology field, particularly a kind of hearing assistance device.
Background technology
Existing hearing assistance device price is high, and volume is large, and power consumption, and the elderly needs the used time to open switch ability hearing aid, very inconvenient.
The volume of hearing assistance device is large, mainly determined by power supply, the electric energy conversion efficiency of power supply is low, must be made up by battery capacity, how to improve the electric energy conversion efficiency of power supply, reduce battery volume, and then reduce the overall volume of hearing assistance device, what strengthen user wears experience, is current problem demanding prompt solution.
Summary of the invention
The present invention proposes a kind of hearing assistance device, solves existing hearing assistance device price high, and volume is large, and the problem of power consumption.
Technical scheme of the present invention is achieved in that
A kind of hearing assistance device, comprising: microphone, its positive terminal is connected to the first end of the first resistor, and its negative pole end is connected to the negative pole of power supply; Second end of described first resistor is connected to the first end of receiver J-Horner, and the second end of earphone jack is connected to the positive pole of described power supply; First capacitor, its first end is connected to the common port of described microphone and the first resistor, its the second end is connected to the first end of the second resistor, second end of the second resistor is connected to the first end of adjustable resistor, second end of adjustable resistor is connected to the input of COMS amplifier, the output of COMS amplifier is connected to the sliding end of described adjustable resistor by the 3rd resistor, wherein, COMS amplifier comprises three not gates be connected in series; Second capacitor, its first end is connected to the output of described COMS amplifier, its the second end is connected to the base stage of PNP transistor, the collector electrode of PNP transistor is connected to the positive pole of described power supply, and the emitter of PNP transistor is connected to the negative pole of described power supply and is connected to its base stage by the 4th resistor;
Described power supply comprises:
Input port, receives input voltage;
Output port, provides output voltage;
First switch and second switch, be coupled in series between input port and reference ground;
Output inductor, is coupled between the coupled in series node of the first switch and second switch and output port;
Output capacitor, is coupled between output port and reference ground;
Sampling resistor, with the first switch coupled in series;
Operational amplifier, has first input end, the second input terminal and lead-out terminal, and its first input end and the second input terminal are connected across sampling resistor two ends, and its lead-out terminal produces inductive current sampled signal;
Feedback component, is coupled to output port and receives output voltage, and produce the feedback voltage of reflection output voltage;
Voltage comparator, has in-phase input end, inverting input and lead-out terminal, and its in-phase input end receives reference voltage, and its inverting input is coupled to feedback component and receives feedback voltage, and its lead-out terminal produces voltage comparison signal;
Selector switch, there is the first terminal, the second terminal, the 3rd terminal and control terminal, its the first terminal couples the first current peak, and its second terminal couples the second current peak, and its control terminal is coupled to the lead-out terminal receiver voltage comparison signal of voltage comparator;
Current comparator, there is in-phase input end, inverting input and lead-out terminal, its in-phase input end is coupled to the lead-out terminal receiving inductance current sampling signal of operational amplifier, and its inverting input is coupled to the 3rd terminal of selector switch, its lead-out terminal generation current comparison signal;
Control and drive circuit, be coupled to the lead-out terminal received current comparison signal of current comparator, and based on electric current comparison signal, produce double switch drive singal, to control the break-make of the first switch and second switch;
When voltage comparison signal is high level, the 3rd terminal of selector switch is connected to its first terminal, makes the inverting input of current comparator receive the first current peak;
When voltage comparison signal is low level, the 3rd terminal of selector switch is connected to its second terminal, makes the inverting input of current comparator receive the second current peak;
Described first current peak is greater than the second current peak;
Described feedback component comprises and is coupled in series in output port and with reference to the first resistance between ground and the second resistance, wherein feedback voltage produces at the coupled in series Nodes of the first resistance and the second resistance;
Comprise further:
Compensation condenser, is coupled between the lead-out terminal of operational amplifier and reference ground.
The invention has the beneficial effects as follows:
Hearing assistance device simplicity of design is reliable, easy to use, reduces machine volume.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the circuit diagram of a kind of hearing assistance device of the present invention;
Fig. 2 is the circuit diagram of power supply of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, a kind of hearing assistance device of the present invention, comprising: microphone 10, and its positive terminal is connected to the first end of the first resistor 21, and its negative pole end is connected to the negative pole of power supply 60; Second end of the first resistor 21 is connected to the first end of receiver J-Horner 50, and the second end of earphone jack 50 is connected to the positive pole of power supply 60; First capacitor 31, its first end is connected to the common port of microphone 10 and the first resistor 21, its second end is connected to the first end of the second resistor 22, second end of the second resistor 22 is connected to the first end of adjustable resistor 25, second end of adjustable resistor 25 is connected to the input of COMS amplifier, the output of COMS amplifier is connected to the sliding end of adjustable resistor 25 by the 3rd resistor 23, wherein, COMS amplifier comprises three not gates be connected in series 71, not gate 72 and not gate 73; Second capacitor 32, its first end is connected to the output of COMS amplifier, its the second end is connected to the base stage of PNP transistor 40, the collector electrode of PNP transistor 40 is connected to the positive pole of power supply 60, and the emitter of PNP transistor 40 is connected to the negative pole of power supply 60 and is connected to its base stage by the 4th resistor 24.
Fig. 2 is the electrical block diagram of power supply 100 according to an embodiment of the invention.As shown in Figure 2, power supply 100 of the present invention comprises: input port 101, receives input voltage vin; Output port 102, provides output voltage Vo; First switch 103 and second switch 104, be coupled in series between input port 101 and reference ground; Output inductor 105, between the coupled in series node being coupled in the first switch 103 and second switch 104 and output port 102; Output capacitor 106, is coupled between output port 102 and reference ground; Sampling resistor 107, with the first switch 103 coupled in series; Operational amplifier 108, has first input end, the second input terminal and lead-out terminal, and its first input end and the second input terminal are connected across sampling resistor 107 two ends, and its lead-out terminal produces inductive current sampled signal Isen; Feedback component 109, is coupled to output port 102 and receives output voltage Vo, and produces the feedback voltage Vfb of reflection output voltage Vo; Voltage comparator 110, has in-phase input end, inverting input and lead-out terminal, and its in-phase input end receives reference voltage Vref, and its inverting input is coupled to feedback component 109 and receives feedback voltage Vfb, and its lead-out terminal produces voltage comparison signal; Selector switch 111, there is the first terminal, the second terminal, the 3rd terminal and control terminal, its the first terminal couples the first current peak Ilim1, and its second terminal couples the second current peak Ilim2, and its control terminal is coupled to the lead-out terminal receiver voltage comparison signal of voltage comparator 110; Current comparator 112, there is in-phase input end, inverting input and lead-out terminal, its in-phase input end is coupled to the lead-out terminal receiving inductance current sampling signal Isen of operational amplifier 108, its inverting input is coupled to the 3rd terminal of selector switch 111, its lead-out terminal generation current comparison signal; Control and drive circuit 113, be coupled to the lead-out terminal received current comparison signal of current comparator 112, and based on electric current comparison signal, produce double switch drive singal, to control the break-make of the first switch 103 and second switch 104.
Preferably, described power supply 100 also comprises: compensation condenser 114, is coupled between the lead-out terminal of operational amplifier 108 and reference ground.
Preferably, feedback component 109 comprises and is coupled in series in output port 102 and with reference to the first resistance between ground and the second resistance, wherein feedback voltage Vfb produces at the series connection node place of the first resistance and the second resistance.
Preferably, when voltage comparison signal is high level, the 3rd terminal of selector switch 111 is connected to its first terminal, makes the inverting input of current comparator 112 receive the first current peak Ilim1; When voltage comparison signal is low level, the 3rd terminal of selector switch 111 is connected to its second terminal, makes the inverting input of current comparator 112 receive the second current peak Ilim2.
Preferably, the first current peak Ilim1 is greater than the second current peak Ilim2.
When power supply 100 normally runs, when the first switch 103 is switched on, second switch 104 is disconnected, input voltage vin is transmitted via sampling resistor 107, first switch 103, output inductor 105 and output capacitor 106 and is converted into output voltage Vo.Now inductive current is the electric current flowing through sampling resistor 107.This electric current starts to increase.The inductive current sampled signal Isen that then operational amplifier 108 exports also starts to increase.When it increases to the signal of current comparator 112 inverting input, the electric current comparison signal trigging signal that current comparator 112 exports.Accordingly, the two-way drive singal trigging signal that control and drive circuit 113 export, makes the first switch 103 be disconnected, and second switch 104 is switched on.
When the load of power supply 100 is relatively heavier, output voltage Vo is relatively little, then feedback voltage Vfb is also relatively little.Now feedback voltage Vfb is less than reference voltage Vref, and the voltage comparison signal that voltage comparator 110 exports is high level.Then the 3rd terminal of selector switch 111 is connected to its first terminal, makes the inverting input of current comparator 112 receive the first current peak Ilim1.Namely under heavy condition, when inductive current sampled signal Isen reaches the first current peak Ilim1, the electric current comparison signal trigging signal that current comparator 112 exports, and then the first switch 103 is disconnected, by second switch 104 conducting via after control and drive circuit 113.
When the load of power supply 100 is relatively light, output voltage Vo is relatively large, then feedback voltage Vfb is also relatively large.Now feedback voltage Vfb is greater than reference voltage Vref, and the voltage comparison signal that voltage comparator 110 exports is low level.Then the 3rd terminal of selector switch 111 is connected to its second terminal, makes the inverting input of current comparator 112 receive the second current peak Ilim2.Namely under light condition, when inductive current sampled signal Isen reaches the second current peak Ilim2, the electric current comparison signal trigging signal that current comparator 112 exports, and then the first switch 103 is disconnected, by second switch 104 conducting via after control and drive circuit 113.
As previously mentioned, the first current peak Ilim1 is greater than the second current peak Ilim2, the inductive current peak under making the inductive current peak of power supply 100 under light condition be less than its heavy condition, thus reduces the inductive current ripple under its light condition.
Transistor is connected into emitter follower form, amplifies the AC signal that cmos amplifier is exported by the second capacitor-coupled, and promote common headphones, wherein, the 4th resistor is biasing resistor.Complete machine adopts earphone jack to double as mains switch, and when headset plug inserts, power supply is connected, and when plug is extracted, power supply cuts off automatically, simplifies circuit structure, reduces machine volume.
Hearing assistance device simplicity of design of the present invention is reliable, easy to use, reduces machine volume.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (1)
1. a hearing assistance device, is characterized in that, comprising:
Microphone, its positive terminal is connected to the first end of the first resistor, and its negative pole end is connected to the negative pole of power supply; Second end of described first resistor is connected to the first end of receiver J-Horner, and the second end of earphone jack is connected to the positive pole of described power supply;
First capacitor, its first end is connected to the common port of described microphone and the first resistor, its the second end is connected to the first end of the second resistor, second end of the second resistor is connected to the first end of adjustable resistor, second end of adjustable resistor is connected to the input of COMS amplifier, the output of COMS amplifier is connected to the sliding end of described adjustable resistor by the 3rd resistor, wherein, COMS amplifier comprises three not gates be connected in series;
Second capacitor, its first end is connected to the output of described COMS amplifier, its the second end is connected to the base stage of PNP transistor, the collector electrode of PNP transistor is connected to the positive pole of described power supply, and the emitter of PNP transistor is connected to the negative pole of described power supply and is connected to its base stage by the 4th resistor
Described power supply comprises:
Input port, receives input voltage;
Output port, provides output voltage;
First switch and second switch, be coupled in series between input port and reference ground;
Output inductor, is coupled between the coupled in series node of the first switch and second switch and output port;
Output capacitor, is coupled between output port and reference ground;
Sampling resistor, with the first switch coupled in series;
Operational amplifier, has first input end, the second input terminal and lead-out terminal, and its first input end and the second input terminal are connected across sampling resistor two ends, and its lead-out terminal produces inductive current sampled signal;
Feedback component, is coupled to output port and receives output voltage, and produce the feedback voltage of reflection output voltage;
Voltage comparator, has in-phase input end, inverting input and lead-out terminal, and its in-phase input end receives reference voltage, and its inverting input is coupled to feedback component and receives feedback voltage, and its lead-out terminal produces voltage comparison signal;
Selector switch, there is the first terminal, the second terminal, the 3rd terminal and control terminal, its the first terminal couples the first current peak, and its second terminal couples the second current peak, and its control terminal is coupled to the lead-out terminal receiver voltage comparison signal of voltage comparator;
Current comparator, there is in-phase input end, inverting input and lead-out terminal, its in-phase input end is coupled to the lead-out terminal receiving inductance current sampling signal of operational amplifier, and its inverting input is coupled to the 3rd terminal of selector switch, its lead-out terminal generation current comparison signal;
Control and drive circuit, be coupled to the lead-out terminal received current comparison signal of current comparator, and based on electric current comparison signal, produce double switch drive singal, to control the break-make of the first switch and second switch;
When voltage comparison signal is high level, the 3rd terminal of selector switch is connected to its first terminal, makes the inverting input of current comparator receive the first current peak;
When voltage comparison signal is low level, the 3rd terminal of selector switch is connected to its second terminal, makes the inverting input of current comparator receive the second current peak;
Described first current peak is greater than the second current peak;
Described feedback component comprises and is coupled in series in output port and with reference to the first resistance between ground and the second resistance, wherein feedback voltage produces at the coupled in series Nodes of the first resistance and the second resistance;
Comprise further:
Compensation condenser, is coupled between the lead-out terminal of operational amplifier and reference ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510992686.1A CN105491484A (en) | 2015-12-28 | 2015-12-28 | Hearing assistance device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510992686.1A CN105491484A (en) | 2015-12-28 | 2015-12-28 | Hearing assistance device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105491484A true CN105491484A (en) | 2016-04-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510992686.1A Pending CN105491484A (en) | 2015-12-28 | 2015-12-28 | Hearing assistance device |
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| Country | Link |
|---|---|
| CN (1) | CN105491484A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103036427A (en) * | 2012-12-11 | 2013-04-10 | 青岛联盟电子仪器有限公司 | Synchronous buck converter |
| CN103051187A (en) * | 2012-12-12 | 2013-04-17 | 青岛联盟电子仪器有限公司 | Switching power supply circuit under double ring control |
| EP1835708B1 (en) * | 2006-03-13 | 2013-05-08 | Starkey Laboratories, Inc. | Output phase modulation entrainment containment for digital filters |
| CN203340285U (en) * | 2013-06-21 | 2013-12-11 | 青岛滨海学院 | Electronic hearing aid |
-
2015
- 2015-12-28 CN CN201510992686.1A patent/CN105491484A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1835708B1 (en) * | 2006-03-13 | 2013-05-08 | Starkey Laboratories, Inc. | Output phase modulation entrainment containment for digital filters |
| CN103036427A (en) * | 2012-12-11 | 2013-04-10 | 青岛联盟电子仪器有限公司 | Synchronous buck converter |
| CN103051187A (en) * | 2012-12-12 | 2013-04-17 | 青岛联盟电子仪器有限公司 | Switching power supply circuit under double ring control |
| CN203340285U (en) * | 2013-06-21 | 2013-12-11 | 青岛滨海学院 | Electronic hearing aid |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160413 |