CN105472519A - Hearing aid - Google Patents
Hearing aid Download PDFInfo
- Publication number
- CN105472519A CN105472519A CN201510998195.8A CN201510998195A CN105472519A CN 105472519 A CN105472519 A CN 105472519A CN 201510998195 A CN201510998195 A CN 201510998195A CN 105472519 A CN105472519 A CN 105472519A
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- China
- Prior art keywords
- terminal
- resistor
- coupled
- voltage
- former limit
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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
- H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
- H04R2225/53—Hearing aid for unilateral hearing impairment using Contralateral Routing Of Signals [CROS]
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Neurosurgery (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Rectifiers (AREA)
Abstract
The invention provides a hearing aid, comprising a microphone, wherein a positive electrode end of the microphone is connected to a first resistor, and a negative electrode end of the microphone is connected to a negative electrode of a power supply; the first resistor connected to an earphone jack, wherein the earphone jack is connected to a positive electrode of the power supply; a first capacitor connected to the microphone and a common end of the first resistor, wherein a second end of the first capacitor is connected to a second resistor, the second resistor is connected to a first end of an adjustable resistor, the second end of the adjustable resistor is connected to an input end of a COMS amplifier, and an output end of the COMS amplifier is connected to a sliding end of the adjustable resistor through a third resistor; and a second capacitor, wherein the first end of the second capacitor is connected to the output end of the COMS amplifier, the second end of the second capacitor is connected to a base of a PNP transistor, a collector of the PNP transistor is connected to the positive electrode of the power supply, and an emitter of the PNP transistor is connected to the negative electrode of the power supply and is connected to the base thereof through a fourth resistor.
Description
Technical field
The present invention relates to electronic technology field, particularly a kind of hearing instrument.
Background technology
Existing hearing instrument 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 instrument 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 instrument, what strengthen user wears experience, is current problem demanding prompt solution.
Summary of the invention
The present invention proposes a kind of hearing instrument, solves existing hearing instrument 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 instrument, 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;
Rectification unit, is coupled to input port and receives input voltage, produce commutating voltage;
Transformer, comprises former limit winding and vice-side winding, and its limit, Central Plains winding and vice-side winding respectively have the first terminal and the second terminal, and the first terminal of former limit winding is coupled to rectification unit and receives commutating voltage, and the second terminal of vice-side winding connects secondary side reference ground;
Former limit power switch, is coupled between the second terminal of former limit winding and reference ground, former limit;
Secondary side diode, is coupled between the first terminal of vice-side winding and output port;
Output capacitor, is coupled between output port and secondary side reference ground;
Feedback component, comprises secondary part and former edge is divided;
Secondary contact resistance, Zener diode and former limit contact resistance, wherein the secondary part of feedback component, secondary contact resistance and Zener diode are coupled in series between output port and secondary side reference ground, divide generation feedback voltage with the former edge in feedback component;
Voltage comparator, there is in-phase input end, inverting input and lead-out terminal, its in-phase input end threshold level voltage, its inverting input divides with former limit contact resistance with being coupled to the reference of former limit via the former edge of feedback component, to receive feedback voltage, 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 first frequency signal, its second terminal couples second frequency signal, its control terminal is coupled to the lead-out terminal receiver voltage comparison signal of voltage comparator, and its 3rd terminal provides frequency reference signal according to voltage comparison signal;
Frequency comparator, has in-phase input end, inverting input and lead-out terminal, and its inverting input is coupled to the 3rd terminal reception frequency reference signal of selector switch, and its lead-out terminal provides clock signal;
Sawtooth generator, is coupled to the lead-out terminal receive clock signal of frequency comparator, and provides sawtooth signal to the in-phase input end of frequency comparator based on clock signal;
Control and drive circuit, be coupled to the lead-out terminal receive clock signal of frequency comparator, and based on clock signal, produce switching drive signal, to control the break-make of former limit power switch.
The invention has the beneficial effects as follows:
Hearing instrument 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 instrument 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 instrument 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; Rectification unit 103, is coupled to input port 101 and receives input voltage vin, produces commutating voltage; Transformer, comprise former limit winding 104-1 and vice-side winding 104-2, its limit, Central Plains winding 104-1 and vice-side winding 104-2 respectively has the first terminal and the second terminal, the first terminal of former limit winding 104-1 is coupled to rectification unit 103 and receives commutating voltage, and second terminal of vice-side winding 104-2 connects secondary side reference ground; Former limit power switch 105, is coupled between second terminal of former limit winding 104-1 and reference ground, former limit; Secondary side diode 106, is coupled between the first terminal of vice-side winding 104-2 and output port 102; Output capacitor 107, is coupled between output port 102 and secondary side reference ground; Feedback component, comprises secondary part 108-1 and former edge divides 108-2; Secondary contact resistance 109, Zener diode 110 and former limit contact resistance 111, wherein the secondary part 108-1 of feedback component, secondary contact resistance 109 and Zener diode 110 are coupled in series between output port 102 and secondary side reference ground, produce feedback voltage Vfb to divide 108-2 in the former edge of feedback component; Voltage comparator 112, there is in-phase input end, inverting input and lead-out terminal, its in-phase input end threshold level voltage Vth, its inverting input divides 108-2 and former limit contact resistance 111 to be coupled to former limit with reference to ground via the former edge of feedback component, to receive feedback voltage Vfb, its lead-out terminal produces voltage comparison signal; Selector switch 113, there is the first terminal, the second terminal, the 3rd terminal and control terminal, its the first terminal couples first frequency signal Vf1, its second terminal couples second frequency signal Vf2, its control terminal is coupled to the lead-out terminal receiver voltage comparison signal of voltage comparator 112, and its 3rd terminal provides frequency reference signal Vfr according to voltage comparison signal; Frequency comparator 114, has in-phase input end, inverting input and lead-out terminal, and its inverting input is coupled to the 3rd terminal reception frequency reference signal Vfr of selector switch 113, and its lead-out terminal provides clock signal clk; Sawtooth generator 115, is coupled to the lead-out terminal receive clock signal CLK of frequency comparator 114, and provides sawtooth signal Vsw to the in-phase input end of frequency comparator 114 based on clock signal clk; Control and drive circuit 116, be coupled to the lead-out terminal receive clock signal of frequency comparator 114, and based on clock signal, produce switching drive signal, to control the break-make of former limit power switch 105.
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 instrument 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 instrument, 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;
Rectification unit, is coupled to input port and receives input voltage, produce commutating voltage;
Transformer, comprises former limit winding and vice-side winding, and its limit, Central Plains winding and vice-side winding respectively have the first terminal and the second terminal, and the first terminal of former limit winding is coupled to rectification unit and receives commutating voltage, and the second terminal of vice-side winding connects secondary side reference ground;
Former limit power switch, is coupled between the second terminal of former limit winding and reference ground, former limit;
Secondary side diode, is coupled between the first terminal of vice-side winding and output port;
Output capacitor, is coupled between output port and secondary side reference ground;
Feedback component, comprises secondary part and former edge is divided;
Secondary contact resistance, Zener diode and former limit contact resistance, wherein the secondary part of feedback component, secondary contact resistance and Zener diode are coupled in series between output port and secondary side reference ground, divide generation feedback voltage with the former edge in feedback component;
Voltage comparator, there is in-phase input end, inverting input and lead-out terminal, its in-phase input end threshold level voltage, its inverting input divides with former limit contact resistance with being coupled to the reference of former limit via the former edge of feedback component, to receive feedback voltage, 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 first frequency signal, its second terminal couples second frequency signal, its control terminal is coupled to the lead-out terminal receiver voltage comparison signal of voltage comparator, and its 3rd terminal provides frequency reference signal according to voltage comparison signal;
Frequency comparator, has in-phase input end, inverting input and lead-out terminal, and its inverting input is coupled to the 3rd terminal reception frequency reference signal of selector switch, and its lead-out terminal provides clock signal;
Sawtooth generator, is coupled to the lead-out terminal receive clock signal of frequency comparator, and provides sawtooth signal to the in-phase input end of frequency comparator based on clock signal;
Control and drive circuit, be coupled to the lead-out terminal receive clock signal of frequency comparator, and based on clock signal, produce switching drive signal, to control the break-make of former limit power switch.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201510998195.8A CN105472519A (en) | 2015-12-25 | 2015-12-25 | Hearing aid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201510998195.8A CN105472519A (en) | 2015-12-25 | 2015-12-25 | Hearing aid |
Publications (1)
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CN105472519A true CN105472519A (en) | 2016-04-06 |
Family
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Family Applications (1)
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CN201510998195.8A Pending CN105472519A (en) | 2015-12-25 | 2015-12-25 | Hearing aid |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1781240A (en) * | 2004-02-26 | 2006-05-31 | 半导体元件工业有限责任公司 | Power supply controller and structure |
CN102916595A (en) * | 2012-10-25 | 2013-02-06 | 深圳市明微电子股份有限公司 | Switching power supply and multi-threshold switching circuit thereof |
CN203340285U (en) * | 2013-06-21 | 2013-12-11 | 青岛滨海学院 | Electronic hearing aid |
CN203352442U (en) * | 2013-07-02 | 2013-12-18 | 西南交通大学 | Fixed-frequency constant on-off time controlling apparatus of dynamic adjusting switch converter |
-
2015
- 2015-12-25 CN CN201510998195.8A patent/CN105472519A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1781240A (en) * | 2004-02-26 | 2006-05-31 | 半导体元件工业有限责任公司 | Power supply controller and structure |
CN102916595A (en) * | 2012-10-25 | 2013-02-06 | 深圳市明微电子股份有限公司 | Switching power supply and multi-threshold switching circuit thereof |
CN203340285U (en) * | 2013-06-21 | 2013-12-11 | 青岛滨海学院 | Electronic hearing aid |
CN203352442U (en) * | 2013-07-02 | 2013-12-18 | 西南交通大学 | Fixed-frequency constant on-off time controlling apparatus of dynamic adjusting switch converter |
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Application publication date: 20160406 |
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