CN105357610A - Microphone - Google Patents
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- CN105357610A CN105357610A CN201510782893.4A CN201510782893A CN105357610A CN 105357610 A CN105357610 A CN 105357610A CN 201510782893 A CN201510782893 A CN 201510782893A CN 105357610 A CN105357610 A CN 105357610A
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Abstract
The invention discloses a microphone. The microphone comprises a voice pick-up circuit, a single-end to dual-end circuit, an amplification output circuit, a human body signal induction circuit, an amplifying and shaping circuit, a control signal generating circuit and a mute control circuit; the voice pick-up circuit is connected with the single-end to dual-end circuit; the single-end to dual-end circuit is connected with the amplification output circuit; the human body signal induction circuit is connected with the amplifying and shaping circuit; the amplifying and shaping circuit is connected with the control signal generating circuit; the control signal generating circuit is connected with the voice pick-up circuit and the mute control circuit separately; and the mute control circuit end is connected with the amplification output circuit. The microphone has the advantages that when the human body signal induction circuit induces a human body, the microphone is in a normal use state; when the human body signal induction circuit cannot induce a human body, the amplification output circuit does not output voice signals and the microphone is in a mute state; when the microphone is not used, the microphone does not output noise; and in addition, the microphone does not need to be managed by a special person, so that the microphone is convenient to operate and relatively low in use cost.
Description
Technical field
The present invention relates to a kind of microphone, especially relate to a kind of microphone by induction human body automatic operation.
Background technology
Existing microphone generally includes voice pickup circuit, Single-to-differenticonversion conversion circuit and amplification output circuit, Single-to-differenticonversion conversion circuit have an input and and two outputs, amplification output circuit has two inputs and two outputs, the output of voice pickup circuit is connected with the input of Single-to-differenticonversion conversion circuit, and two inputs of Single-to-differenticonversion conversion circuit and amplification output circuit connect one to one.After voice pickup circuit pickup external voice signal, this signal is flowed to Single-to-differenticonversion conversion circuit, the signal received is converted to left channel signals by impedance transformation to Single-to-differenticonversion conversion circuit and right sound flows to amplification output circuit to signal, and left channel signals and right sound export respectively by amplification output circuit after signal amplifies.
But, there is following problem in existing microphone: in microphone opening process, and voice pickup circuit is always in running order, when user stops using, voice pickup circuit still can subsequent pick-up voice signal, now will pick up ambient sound and form noise and export; In order to avoid microphone output noise, need to be equipped with the power supply that special messenger cuts off backstage audio output device or the mute microphone (MIC) be connected with microphone, operation is inconvenient and use cost is higher.
Summary of the invention
Technical problem to be solved by this invention is to provide and a kind of can be switched to silent mode after user stops using, can not output noise, does not need to be equipped with personal management, easy to operate, the microphone that use cost is lower.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of microphone, comprise voice pickup circuit, Single-to-differenticonversion conversion circuit and amplification output circuit, described Single-to-differenticonversion conversion circuit has input, first output and the second output, described amplification output circuit has first input end, second input, first control end, second control end, first output and the second output, the output of described voice pickup circuit is connected with the input of described Single-to-differenticonversion conversion circuit, first output of described Single-to-differenticonversion conversion circuit is connected with the first input end of described amplification output circuit, second output of described Single-to-differenticonversion conversion circuit is connected with the second input of described amplification output circuit, described microphone also comprises human body signal sensor circuit, amplification and rectification circuit, control signal produces circuit and muting control circuit, described control signal produces circuit and has input, first output and the second output, described muting control circuit has input, first output and the second output, the output of described human body signal sensor circuit is connected with the input of described amplification and rectification circuit, the input that output and the described control signal of described amplification and rectification circuit produce circuit is connected, the first output that described control signal produces circuit is connected with the input of described voice pickup circuit, the second output that described control signal produces circuit is connected with the input of described muting control circuit, first output of described muting control circuit is connected with the first control end of described amplification output circuit, second output of described muting control circuit is connected with the second control end of described amplification output circuit,
Described voice pickup circuit is used for picking up voice signal in real time, whether described human body signal sensor circuit is used in real time induction human body exists and generates corresponding signal and sends to described amplification and rectification circuit, and described Single-to-differenticonversion conversion circuit is used for the voice signal received to be converted to left channel signals and right sound flows to described amplification output circuit to signal; When described human body signal sensor circuit senses that human body exists, described voice pickup circuit pickup be the voice signal of user, described control signal produce circuit control respectively described voice pickup circuit the voice signal of its current pickup is sent to described Single-to-differenticonversion conversion circuit and muting control circuit described in controlling control described in the left channel signals that received of amplification output circuit and right sound export respectively after signal amplification, now, microphone is in normal operating condition; When the induction of described human body signal sensor circuit exists less than human body, what described voice pickup circuit picked up is environment noise signals, described control signal produce circuit control respectively described voice pickup circuit stop the environment noise signals of its current pickup to be sent to described Single-to-differenticonversion conversion circuit and muting control circuit described in controlling control described in the first output of amplification output circuit and the second output all not output sound signals, now, microphone is in mute state.
Described human body signal sensor circuit comprises the first resistance, the second resistance, the 3rd resistance, the first electric capacity, model are RE46B pyroelectric infrared sensor and the first diode, the first described diode is voltage stabilizing didoe, one end access power supply of the first described resistance, the other end of the first described resistance, one end of the second described resistance, one end of the first described electric capacity is connected with the negative pole of the first described diode, the positive pole of the first described diode and the other end ground connection of the first described electric capacity, the other end and the described model of the second described resistance are that the d end of the pyroelectric infrared sensor of RE46B is connected, described model is that the s end of the pyroelectric infrared sensor of RE46B is connected with one end of the 3rd described resistance and its link is the output of described human body signal sensor circuit, described model is the g end of the pyroelectric infrared sensor of RE46B and the equal ground connection of the other end of the 3rd described resistance.
Described amplification and rectification circuit comprises the first chip, the second chip, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, the second diode, the 3rd diode, the 4th diode and the 5th diode, the first described chip and the second described chip are the operational amplifier that model is BA1458, one end of the 4th described resistance, one end of the second described electric capacity, 2nd pin of the first described chip is connected with one end of the 5th described resistance, the other end of the 5th described resistance is connected with one end of the 4th described electric capacity, the other end ground connection of the 4th described electric capacity, 3rd pin of the first described chip is the input of described amplification and rectification circuit, the other end of the 4th described resistance, the other end of the second described electric capacity, one end of the 3rd described electric capacity is connected with the 1st pin of the first described chip, the other end of the 3rd described electric capacity, one end of the 8th described resistance, the negative pole of the second described diode, the positive pole of the 3rd described diode is connected with the 5th pin of the first described chip, the positive pole of the second described diode, one end of the 6th described resistance is connected with the 2nd pin of the second described chip, the other end access power supply of the 6th described resistance, the negative pole of the 3rd described diode, one end of the 9th described resistance is connected with the 5th pin of the second described chip, the other end ground connection of the 9th described resistance, the other end of the 8th described resistance, 6th pin of the second described chip, one end of the 7th described resistance is connected with one end of the 5th described electric capacity, the other end of the 7th described resistance, the other end of the 5th described electric capacity, 7th pin of the first described chip, 3rd pin of the second described chip is connected with the 6th pin of the second described chip, 1st pin of the second described chip is connected with the positive pole of the 4th described diode, the negative pole of the 4th described diode, the negative pole of the 5th described diode, one end of the tenth described resistance is connected with one end of the 6th described electric capacity and its link is the output of described amplification and rectification circuit, the positive pole of the 5th described diode is connected with the 7th pin of the second described chip, the other end of the tenth described resistance and the equal ground connection of the other end of the 6th described electric capacity.
Described control signal produces circuit and comprises the 3rd chip, the 7th electric capacity, the 8th electric capacity, the 9th electric capacity, the tenth electric capacity, the 11 resistance and the 12 resistance that model is PIC12F625; one end of the 7th described electric capacity, one end of the 8th described electric capacity is connected with the 8th pin of the 3rd described chip and it connects termination power, the other end of the 7th described electric capacity and the equal ground connection of the other end of the 8th described electric capacity, 7th pin of the 3rd described chip is the input that described control signal produces circuit, 5th pin of the 3rd described chip is connected with one end of the 9th described electric capacity and its link is the first output that described control signal produces circuit, 6th pin of the 3rd described chip is connected with one end of the tenth described electric capacity and its link is the second output that described control signal produces circuit, the other end of the 9th described electric capacity and the equal ground connection of the other end of the tenth described electric capacity, 2nd pin of the 3rd described chip is connected with one end of the 12 described resistance, 3rd pin of the 3rd described chip is connected with one end of the 11 described resistance, 1st pin of the 3rd described chip, the other end of the 11 described resistance and the equal ground connection of the other end of the 12 described resistance.
Described muting control circuit comprises the 13 resistance, the 14 resistance, the 15 resistance, the 16 resistance, the first triode and the second triode, one end of the 13 described resistance is connected with one end of the 15 described resistance and its link is the input of described muting control circuit, the other end of the 13 described resistance, one end of the 14 described resistance is connected with the base stage of the first described triode, the other end of the 14 described resistance, the collector electrode of the first described triode, one end of the 16 described resistance and the equal ground connection of collector electrode of the second described triode, the other end of the 15 described resistance, the other end of the 16 described resistance is connected with the base stage of the second described triode, first output of the muting control circuit described in transmitting very of the first described triode, second output of the muting control circuit described in transmitting very of the second described triode.
Described voice pickup circuit comprises the 11 electric capacity, the 12 electric capacity, the 13 electric capacity, the 14 electric capacity, the 17 resistance, the 18 resistance, the 19 resistance, the 20 resistance, the 21 resistance, the 22 resistance, the 23 resistance, the 3rd triode and microphone, one end of the 11 described electric capacity, power supply is all accessed in one end of the 17 described resistance and one end of the 18 described resistance, the other end ground connection of the 11 described electric capacity, the other end of the 17 described resistance is connected with the emitter of the 3rd described triode, the other end of the 18 described resistance, one end of the 19 described resistance, one end of the 20 described resistance is connected with the base stage of the 3rd described triode, the other end of the 19 described resistance is the input of described voice pickup circuit, the other end of the 20 described resistance and the equal ground connection in one end of the 12 described electric capacity, the other end of the 12 described electric capacity, the collector electrode of the 3rd described triode is connected with one end of the 21 described resistance, the other end of the 21 described resistance, one end of the 13 described electric capacity is connected with one end of described microphone, the other end of described microphone, one end of the 23 described resistance is connected with one end of the 14 described electric capacity, the other end of the 14 described electric capacity is the output of described voice pickup circuit, the other end of the 13 described electric capacity is connected with one end of the 22 described resistance, the other end of the 22 described resistance is connected with the other end of the 23 described resistance.
Described Single-to-differenticonversion conversion circuit comprises the 24 resistance, the 25 resistance, the 26 resistance, the 27 resistance, the 15 electric capacity, the 16 electric capacity, the 17 electric capacity and a JFET and manages, one end of the 15 described electric capacity is connected with one end of the 24 described resistance and its link access power supply, the other end ground connection of the 15 described electric capacity, the other end of the 24 described resistance, one end of the 16 described electric capacity is connected with the source electrode of a described JFET pipe, the other end of the 16 described electric capacity is the first output of described Single-to-differenticonversion conversion circuit, the grid of a described JFET pipe is connected with one end of the 25 described resistance and its link is the input of described Single-to-differenticonversion conversion circuit, the other end of the 25 described resistance, one end of the 26 described resistance, one end of the 27 described resistance is connected with one end of the 17 described electric capacity, the other end of the 26 described resistance is connected with the drain electrode of a described JFET pipe, the other end of the 17 described electric capacity is the second output of described Single-to-differenticonversion conversion circuit, the other end ground connection of the 27 described resistance.
Described amplification output circuit comprises the 28 resistance, the 29 resistance, the 30 resistance, the 31 resistance, the 32 resistance, the 33 resistance, the 34 resistance, the 35 resistance, the 18 electric capacity, the 19 electric capacity, the 20 electric capacity, the 21 electric capacity, the 4th triode and the 5th triode, one end of the 28 described resistance, one end of the 30 described resistance, one end of the 34 described resistance is connected with one end of the 35 described resistance and its link access power supply, the other end of the 28 described resistance, one end of the 29 described resistance is connected with the base stage of the 4th described triode and its link is the second input of described amplification output circuit, the other end of the 30 described resistance, one end of the 31 described resistance is connected with the base stage of the 5th described triode and its link is the first input end of described amplification output circuit, the other end of the 31 described resistance and the equal ground connection of collector electrode of the 5th described triode, the other end of the 29 described resistance and the equal ground connection of collector electrode of the 4th described triode, the emitter of the 4th described triode, one end of the 33 described resistance is connected with one end of the 19 described electric capacity and its link is the second control end of described amplification output circuit, the emitter of the 5th described triode, one end of the 32 described resistance is connected with one end of the 18 described electric capacity and its link is the first control end of described amplification output circuit, the other end of the 32 described resistance, the other end of the 18 described electric capacity, the other end of the 34 described resistance is connected with one end of the 20 described electric capacity and its link is the first output of described amplification output circuit, the other end of the 19 described electric capacity, the other end of the 33 described resistance, the other end of the 35 described resistance is connected with one end of the 21 described electric capacity and its link is the second output of described amplification output circuit, the other end of the 20 described electric capacity and the other end ground connection of the 21 described electric capacity.
Compared with prior art, the invention has the advantages that by arranging human body signal sensor circuit, amplification and rectification circuit, control signal produces circuit and muting control circuit, control signal produces circuit and has input, first output and the second output, muting control circuit has input, first output and the second output, the output of human body signal sensor circuit is connected with the input of amplification and rectification circuit, the input that output and the control signal of amplification and rectification circuit produce circuit is connected, the first output that control signal produces circuit is connected with the input of sound pick-up circuit, the second output that control signal produces circuit is connected with the input of muting control circuit, first output of muting control circuit is connected with the first control end of amplification output circuit, second output of muting control circuit is connected with the second control end of amplification output circuit, voice pickup circuit is used for picking up voice signal in real time, whether human body signal sensor circuit is used in real time induction human body exists and generates corresponding signal and sends to amplification and rectification circuit, and Single-to-differenticonversion conversion circuit is used for the voice signal received to be converted to left channel signals and right sound flows to amplification output circuit to signal, when human body signal sensor circuit senses that human body exists, the pickup of voice pickup circuit be the voice signal of user, control signal produces circuit and controls voice pickup circuit respectively and the voice signal of its current pickup is sent to Single-to-differenticonversion conversion circuit and control muting control circuit and control the left channel signals that received of amplification output circuit and right sound exports respectively after signal amplification, now, microphone is in normal operating condition, when the induction of human body signal sensor circuit exists less than human body, what voice pickup circuit picked up is environment noise signals, control signal produces circuit and controls voice pickup circuit respectively and stop the environment noise signals of its current pickup to be sent to Single-to-differenticonversion conversion circuit and control muting control circuit and control the first output of amplification output circuit and the second output all not output sound signals, now, microphone is in mute state, after user stops using, microphone can be switched to silent mode thus, can not output noise, do not need to be equipped with personal management, easy to operate, use cost is lower.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present invention;
Fig. 2 is the circuit diagram of human body signal sensor circuit of the present invention;
Fig. 3 is the circuit diagram of amplification and rectification circuit of the present invention;
Fig. 4 is the circuit diagram that control signal of the present invention produces circuit;
Fig. 5 is the circuit diagram of muting control circuit of the present invention;
Fig. 6 is the circuit diagram of voice pickup circuit of the present invention;
Fig. 7 is the circuit diagram of Single-to-differenticonversion conversion circuit of the present invention;
Fig. 8 is the circuit diagram of amplification output circuit of the present invention.
Embodiment
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
Embodiment one: as shown in Figure 1, a kind of microphone, comprise voice pickup circuit 1, Single-to-differenticonversion conversion circuit 2 and amplification output circuit 3, Single-to-differenticonversion conversion circuit 2 has input, first output and the second output, amplification output circuit 3 has first input end, second input, first control end, second control end, first output and the second output, the output of voice pickup circuit 1 is connected with the input of Single-to-differenticonversion conversion circuit 2, first output of Single-to-differenticonversion conversion circuit 2 is connected with the first input end of amplification output circuit 3, second output of Single-to-differenticonversion conversion circuit 2 is connected with the second input of amplification output circuit 3, microphone also comprises human body signal sensor circuit 4, amplification and rectification circuit 5, control signal produces circuit 6 and muting control circuit 7, control signal produces circuit 6 and has input, first output and the second output, muting control circuit 7 has input, first output and the second output, the output of human body signal sensor circuit 4 is connected with the input of amplification and rectification circuit 5, the input that output and the control signal of amplification and rectification circuit 5 produce circuit 6 is connected, the first output that control signal produces circuit 6 is connected with the input of sound pick-up circuit 1, the second output that control signal produces circuit 6 is connected with the input of muting control circuit 7, first output of muting control circuit 7 is connected with the first control end of amplification output circuit 3, second output of muting control circuit 7 is connected with the second control end of amplification output circuit 3, voice pickup circuit 1 is for picking up voice signal in real time, human body signal sensor circuit 4 sends to amplification and rectification circuit 5 for responding to human body in real time and whether existing and generate corresponding signal, and Single-to-differenticonversion conversion circuit 2 is for being converted to left channel signals by the voice signal received and right sound flows to amplification output circuit 3 to signal, when human body signal sensor circuit 4 senses that human body exists, what voice pickup circuit 1 picked up is the voice signal of user, control signal produces circuit 6 and controls voice pickup circuit 1 respectively and the voice signal of its current pickup is sent to Single-to-differenticonversion conversion circuit 2 and control muting control circuit 7 and control left channel signals that amplification output circuit 3 received and right sound exports respectively after signal amplification, now, microphone is in normal operating condition, when human body signal sensor circuit 4 respond to exist less than human body time, what voice pickup circuit 1 picked up is environment noise signals, control signal produces circuit 6 and controls voice pickup circuit 1 respectively and stop the environment noise signals of its current pickup to send to Single-to-differenticonversion conversion circuit 2 and control muting control circuit 7 to control the first output of amplification output circuit 3 and the second output all not output sound signals, now, microphone is in mute state.
Embodiment two: as shown in Figure 1, a kind of microphone, comprise voice pickup circuit 1, Single-to-differenticonversion conversion circuit 2 and amplification output circuit 3, Single-to-differenticonversion conversion circuit 2 has input, first output and the second output, amplification output circuit 3 has first input end, second input, first control end, second control end, first output and the second output, the output of voice pickup circuit 1 is connected with the input of Single-to-differenticonversion conversion circuit 2, first output of Single-to-differenticonversion conversion circuit 2 is connected with the first input end of amplification output circuit 3, second output of Single-to-differenticonversion conversion circuit 2 is connected with the second input of amplification output circuit 3, microphone also comprises human body signal sensor circuit 4, amplification and rectification circuit 5, control signal produces circuit 6 and muting control circuit 7, control signal produces circuit 6 and has input, first output and the second output, muting control circuit 7 has input, first output and the second output, the output of human body signal sensor circuit 4 is connected with the input of amplification and rectification circuit 5, the input that output and the control signal of amplification and rectification circuit 5 produce circuit 6 is connected, the first output that control signal produces circuit 6 is connected with the input of sound pick-up circuit 1, the second output that control signal produces circuit 6 is connected with the input of muting control circuit 7, first output of muting control circuit 7 is connected with the first control end of amplification output circuit 3, second output of muting control circuit 7 is connected with the second control end of amplification output circuit 3, voice pickup circuit 1 is for picking up voice signal in real time, human body signal sensor circuit 4 sends to amplification and rectification circuit 5 for responding to human body in real time and whether existing and generate corresponding signal, and Single-to-differenticonversion conversion circuit 2 is for being converted to left channel signals by the voice signal received and right sound flows to amplification output circuit 3 to signal, when human body signal sensor circuit 4 senses that human body exists, what voice pickup circuit 1 picked up is the voice signal of user, control signal produces circuit 6 and controls voice pickup circuit 1 respectively and the voice signal of its current pickup is sent to Single-to-differenticonversion conversion circuit 2 and control muting control circuit 7 and control left channel signals that amplification output circuit 3 received and right sound exports respectively after signal amplification, now, microphone is in normal operating condition, when human body signal sensor circuit 4 respond to exist less than human body time, what voice pickup circuit 1 picked up is environment noise signals, control signal produces circuit 6 and controls voice pickup circuit 1 respectively and stop the environment noise signals of its current pickup to send to Single-to-differenticonversion conversion circuit 2 and control muting control circuit 7 to control the first output of amplification output circuit 3 and the second output all not output sound signals, now, microphone is in mute state.
As shown in Figure 2, human body signal sensor circuit 4 comprises the first resistance R1, the second resistance R2, the 3rd resistance R3, the first electric capacity C1, model are RE46B pyroelectric infrared sensor K1 and the first diode D1, the first diode D1 is voltage stabilizing didoe, one end access power supply of the first resistance R1, the other end of the first resistance R1, one end of second resistance R2, one end of first electric capacity C1 is connected with the negative pole of the first diode D1, the positive pole of the first diode D1 and the other end ground connection of the first electric capacity C1, the other end and the model of the second resistance R2 are that the d end of the pyroelectric infrared sensor K1 of RE46B is connected, model is that the s end of the pyroelectric infrared sensor K1 of RE46B is connected with one end of the 3rd resistance R3 and its link is the output of human body induction of signal circuit 4, model is the g end of the pyroelectric infrared sensor K1 of RE46B and the equal ground connection of the other end of the 3rd resistance R3.
As shown in Figure 3, amplification and rectification circuit 5 comprises the first chip U1, the second chip U2, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the 9th resistance R9, the tenth resistance R10, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, the 5th electric capacity C5, the 6th electric capacity C6, the second diode D2, the 3rd diode D3, the 4th diode D4 and the 5th diode D5, first chip U1 and the second chip U2 is the operational amplifier that model is BA1458, one end of 4th resistance R4, one end of second electric capacity C2, 2nd pin of the first chip U1 is connected with one end of the 5th resistance R5, the other end of the 5th resistance R5 is connected with one end of the 4th electric capacity C4, the other end ground connection of the 4th electric capacity C4, the 3rd pin of the first chip U1 is the input of amplification and rectification circuit 5, the other end of the 4th resistance R4, the other end of the second electric capacity C2, one end of 3rd electric capacity C3 is connected with the 1st pin of the first chip U1, the other end of the 3rd electric capacity C3, one end of 8th resistance R8, the negative pole of the second diode D2, the positive pole of the 3rd diode D3 is connected with the 5th pin of the first chip U1, the positive pole of the second diode D2, one end of 6th resistance R6 is connected with the 2nd pin of the second chip U2, the other end access power supply of the 6th resistance R6, the negative pole of the 3rd diode D3, one end of 9th resistance R9 is connected with the 5th pin of the second chip U2, the other end ground connection of the 9th resistance R9, the other end of the 8th resistance R8, 6th pin of the second chip U2, one end of 7th resistance R7 is connected with one end of the 5th electric capacity C5, the other end of the 7th resistance R7, the other end of the 5th electric capacity C5, 7th pin of the first chip U1, 3rd pin of the second chip U2 is connected with the 6th pin of the second chip U2, and the 1st pin of the second chip U2 is connected with the positive pole of the 4th diode D4, the negative pole of the 4th diode D4, the negative pole of the 5th diode D5, one end of tenth resistance R10 is connected with one end of the 6th electric capacity C6 and its link is the output of amplification and rectification circuit 5, the positive pole of the 5th diode D5 is connected with the 7th pin of the second chip U2, the other end of the tenth resistance R10 and the equal ground connection of the other end of the 6th electric capacity C6.
As shown in Figure 4, control signal produces circuit 6 and comprises the 3rd chip U3 that model is PIC12F625, the 7th electric capacity C7, the 8th electric capacity C8, the 9th electric capacity C9, the tenth electric capacity C10, the 11 resistance R11 and the 12 resistance R12, one end of 7th electric capacity C7, one end of 8th electric capacity C8 is connected with the 8th pin of the 3rd chip U3 and it connects termination power, the other end of the 7th electric capacity C7 and the equal ground connection of the other end of the 8th electric capacity C8, 7th pin of the 3rd chip U3 is the input that control signal produces circuit 6, 5th pin of the 3rd chip U3 is connected with one end of the 9th electric capacity C9 and its link is the first output that control signal produces circuit 6, 6th pin of the 3rd chip U3 is connected with one end of the tenth electric capacity C10 and its link is the second output that control signal produces circuit 6, the other end of the 9th electric capacity C9 and the equal ground connection of the other end of the tenth electric capacity C10, 2nd pin of the 3rd chip U3 is connected with one end of the 12 resistance R12, 3rd pin of the 3rd chip U3 is connected with one end of the 11 resistance R11, 1st pin of the 3rd chip U3, the other end of the 11 resistance R11 and the equal ground connection of the other end of the 12 resistance R12.
As shown in Figure 5, muting control circuit 7 comprises the 13 resistance R13, the 14 resistance R14, the 15 resistance R15, the 16 resistance R16, the first triode Q1 and the second triode Q2, one end of 13 resistance R13 is connected with one end of the 15 resistance R15 and its link is the input of muting control circuit 7, the other end of the 13 resistance R13, one end of 14 resistance R14 is connected with the base stage of the first triode Q1, the other end of the 14 resistance R14, the collector electrode of the first triode Q1, one end of 16 resistance R16 and the equal ground connection of collector electrode of the second triode Q2, the other end of the 15 resistance R15, the other end of the 16 resistance R16 is connected with the base stage of the second triode Q2, first output of the transmitting of the first triode Q1 very muting control circuit 7, second output of the transmitting of the second triode Q2 very muting control circuit 7.
As shown in Figure 6, voice pickup circuit 1 comprises the 11 electric capacity C11, the 12 electric capacity C12, the 13 electric capacity C13, the 14 electric capacity C14, the 17 resistance R17, the 18 resistance R18, the 19 resistance R19, the 20 resistance R20, the 21 resistance R21, the 22 resistance R22, the 23 resistance R23, the 3rd triode Q3 and microphone G1, one end of 11 electric capacity C11, power supply is all accessed in one end of 17 resistance R17 and one end of the 18 resistance R18, the other end ground connection of the 11 electric capacity C11, the other end of the 17 resistance R17 is connected with the emitter of the 3rd triode Q3, the other end of the 18 resistance R18, one end of 19 resistance R19, one end of 20 resistance R20 is connected with the base stage of the 3rd triode Q3, the other end of the 19 resistance R19 is the input of voice pickup circuit 1, the other end of the 20 resistance R20 and the equal ground connection in one end of the 12 electric capacity C12, the other end of the 12 electric capacity C12, the collector electrode of the 3rd triode Q3 is connected with one end of the 21 resistance R21, the other end of the 21 resistance R21, one end of 13 electric capacity C13 is connected with one end of microphone G1, the other end of microphone G1, one end of 23 resistance R23 is connected with one end of the 14 electric capacity C14, the other end of the 14 electric capacity C14 is the output of voice pickup circuit 1, the other end of the 13 electric capacity C13 is connected with one end of the 22 resistance R22, the other end of the 22 resistance R22 is connected with the other end of the 23 resistance R23.
As shown in Figure 7, Single-to-differenticonversion conversion circuit 2 comprises the 24 resistance R24, the 25 resistance R25, the 26 resistance R26, the 27 resistance R27, the 15 electric capacity C15, the 16 electric capacity C16, the 17 electric capacity C17 and a JFET pipe M1, one end of 15 electric capacity C15 is connected with one end of the 24 resistance R24 and its link access power supply, the other end ground connection of the 15 electric capacity C15, the other end of the 24 resistance R24, one end of 16 electric capacity C16 is connected with the source electrode of a JFET pipe M1, the other end of the 16 electric capacity C16 is the first output of Single-to-differenticonversion conversion circuit 2, the grid of the one JFET pipe M1 is connected with one end of the 25 resistance R25 and its link is the input of Single-to-differenticonversion conversion circuit 2, the other end of the 25 resistance R25, one end of 26 resistance R26, one end of 27 resistance R27 is connected with one end of the 17 electric capacity C17, the other end of the 26 resistance R26 is connected with the drain electrode of a JFET pipe M1, the other end of the 17 electric capacity C17 is the second output of Single-to-differenticonversion conversion circuit 2, the other end ground connection of the 27 resistance R27.
As shown in Figure 8, amplification output circuit 3 comprises the 28 resistance R28, the 29 resistance R29, the 30 resistance R30, the 31 resistance R31, the 32 resistance R32, the 33 resistance R33, the 34 resistance R34, the 35 resistance R35, the 18 electric capacity C18, the 19 electric capacity C19, the 20 electric capacity C20, the 21 electric capacity C21, the 4th triode Q4 and the 5th triode Q5, one end of 28 resistance R28, one end of 30 resistance R30, one end of 34 resistance R34 is connected with one end of the 35 resistance R35 and its link access power supply, the other end of the 28 resistance R28, one end of 29 resistance R29 is connected with the base stage of the 4th triode Q4 and its link is the second input of amplification output circuit 3, the other end of the 30 resistance R30, one end of 31 resistance R31 is connected with the base stage of the 5th triode Q5 and its link is the first input end of amplification output circuit 3, the other end of the 31 resistance R31 and the equal ground connection of collector electrode of the 5th triode Q5, the other end of the 29 resistance R29 and the equal ground connection of collector electrode of the 4th triode Q4, the emitter of the 4th triode Q4, one end of 33 resistance R33 is connected with one end of the 19 electric capacity C19 and its link is the second control end of amplification output circuit 3, the emitter of the 5th triode Q5, one end of 32 resistance R32 is connected with one end of the 18 electric capacity C18 and its link is the first control end of amplification output circuit 3, the other end of the 32 resistance R32, the other end of the 18 electric capacity C18, the other end of the 34 resistance R34 is connected with one end of the 20 electric capacity C20 and its link is the first output of amplification output circuit 3, the other end of the 19 electric capacity C19, the other end of the 33 resistance R33, the other end of the 35 resistance R35 is connected with one end of the 21 electric capacity C21 and its link is the second output of amplification output circuit 3, the other end of the 20 electric capacity C20 and the other end ground connection of the 21 electric capacity C21.
Claims (8)
1. a microphone, comprise voice pickup circuit, Single-to-differenticonversion conversion circuit and amplification output circuit, described Single-to-differenticonversion conversion circuit has input, first output and the second output, described amplification output circuit has first input end, second input, first control end, second control end, first output and the second output, the output of described voice pickup circuit is connected with the input of described Single-to-differenticonversion conversion circuit, first output of described Single-to-differenticonversion conversion circuit is connected with the first input end of described amplification output circuit, second output of described Single-to-differenticonversion conversion circuit is connected with the second input of described amplification output circuit, it is characterized in that described microphone also comprises human body signal sensor circuit, amplification and rectification circuit, control signal produces circuit and muting control circuit, described control signal produces circuit and has input, first output and the second output, described muting control circuit has input, first output and the second output, the output of described human body signal sensor circuit is connected with the input of described amplification and rectification circuit, the input that output and the described control signal of described amplification and rectification circuit produce circuit is connected, the first output that described control signal produces circuit is connected with the input of described voice pickup circuit, the second output that described control signal produces circuit is connected with the input of described muting control circuit, first output of described muting control circuit is connected with the first control end of described amplification output circuit, second output of described muting control circuit is connected with the second control end of described amplification output circuit,
Described voice pickup circuit is used for picking up voice signal in real time, whether described human body signal sensor circuit is used in real time induction human body exists and generates corresponding signal and sends to described amplification and rectification circuit, and described Single-to-differenticonversion conversion circuit is used for the voice signal received to be converted to left channel signals and right sound flows to described amplification output circuit to signal; When described human body signal sensor circuit senses that human body exists, described voice pickup circuit pickup be the voice signal of user, described control signal produce circuit control respectively described voice pickup circuit the voice signal of its current pickup is sent to described Single-to-differenticonversion conversion circuit and muting control circuit described in controlling control described in the left channel signals that received of amplification output circuit and right sound export respectively after signal amplification, now, microphone is in normal operating condition; When the induction of described human body signal sensor circuit exists less than human body, what described voice pickup circuit picked up is environment noise signals, described control signal produce circuit control respectively described voice pickup circuit stop the environment noise signals of its current pickup to be sent to described Single-to-differenticonversion conversion circuit and muting control circuit described in controlling control described in the first output of amplification output circuit and the second output all not output sound signals, now, microphone is in mute state.
2. a kind of microphone according to claim 1, it is characterized in that described human body signal sensor circuit comprises the first resistance, the second resistance, the 3rd resistance, the first electric capacity, model are RE46B pyroelectric infrared sensor and the first diode, the first described diode is voltage stabilizing didoe, one end access power supply of the first described resistance, the other end of the first described resistance, one end of the second described resistance, one end of the first described electric capacity is connected with the negative pole of the first described diode, the positive pole of the first described diode and the other end ground connection of the first described electric capacity, the other end and the described model of the second described resistance are that the d end of the pyroelectric infrared sensor of RE46B is connected, described model is that the s end of the pyroelectric infrared sensor of RE46B is connected with one end of the 3rd described resistance and its link is the output of described human body signal sensor circuit, described model is the g end of the pyroelectric infrared sensor of RE46B and the equal ground connection of the other end of the 3rd described resistance.
3. a kind of microphone according to claim 1, is characterized in that described amplification and rectification circuit comprises the first chip, the second chip, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, the second diode, the 3rd diode, the 4th diode and the 5th diode; The first described chip and the second described chip are the operational amplifier that model is BA1458;
One end of the 4th described resistance, one end of the second described electric capacity, 2nd pin of the first described chip is connected with one end of the 5th described resistance, the other end of the 5th described resistance is connected with one end of the 4th described electric capacity, the other end ground connection of the 4th described electric capacity, 3rd pin of the first described chip is the input of described amplification and rectification circuit, the other end of the 4th described resistance, the other end of the second described electric capacity, one end of the 3rd described electric capacity is connected with the 1st pin of the first described chip, the other end of the 3rd described electric capacity, one end of the 8th described resistance, the negative pole of the second described diode, the positive pole of the 3rd described diode is connected with the 5th pin of the first described chip, the positive pole of the second described diode, one end of the 6th described resistance is connected with the 2nd pin of the second described chip, the other end access power supply of the 6th described resistance, the negative pole of the 3rd described diode, one end of the 9th described resistance is connected with the 5th pin of the second described chip, the other end ground connection of the 9th described resistance, the other end of the 8th described resistance, 6th pin of the second described chip, one end of the 7th described resistance is connected with one end of the 5th described electric capacity, the other end of the 7th described resistance, the other end of the 5th described electric capacity, 7th pin of the first described chip, 3rd pin of the second described chip is connected with the 6th pin of the second described chip, 1st pin of the second described chip is connected with the positive pole of the 4th described diode, the negative pole of the 4th described diode, the negative pole of the 5th described diode, one end of the tenth described resistance is connected with one end of the 6th described electric capacity and its link is the output of described amplification and rectification circuit, the positive pole of the 5th described diode is connected with the 7th pin of the second described chip, the other end of the tenth described resistance and the equal ground connection of the other end of the 6th described electric capacity.
4. a kind of microphone according to claim 1, is characterized in that described control signal produces circuit and comprises the 3rd chip, the 7th electric capacity, the 8th electric capacity, the 9th electric capacity, the tenth electric capacity, the 11 resistance and the 12 resistance that model is PIC12F625;
One end of the 7th described electric capacity, one end of the 8th described electric capacity is connected with the 8th pin of the 3rd described chip and it connects termination power, the other end of the 7th described electric capacity and the equal ground connection of the other end of the 8th described electric capacity, 7th pin of the 3rd described chip is the input that described control signal produces circuit, 5th pin of the 3rd described chip is connected with one end of the 9th described electric capacity and its link is the first output that described control signal produces circuit, 6th pin of the 3rd described chip is connected with one end of the tenth described electric capacity and its link is the second output that described control signal produces circuit, the other end of the 9th described electric capacity and the equal ground connection of the other end of the tenth described electric capacity, 2nd pin of the 3rd described chip is connected with one end of the 12 described resistance, 3rd pin of the 3rd described chip is connected with one end of the 11 described resistance, 1st pin of the 3rd described chip, the other end of the 11 described resistance and the equal ground connection of the other end of the 12 described resistance.
5. a kind of microphone according to claim 1, is characterized in that described muting control circuit comprises the 13 resistance, the 14 resistance, the 15 resistance, the 16 resistance, the first triode and the second triode;
One end of the 13 described resistance is connected with one end of the 15 described resistance and its link is the input of described muting control circuit, the other end of the 13 described resistance, one end of the 14 described resistance is connected with the base stage of the first described triode, the other end of the 14 described resistance, the collector electrode of the first described triode, one end of the 16 described resistance and the equal ground connection of collector electrode of the second described triode, the other end of the 15 described resistance, the other end of the 16 described resistance is connected with the base stage of the second described triode, first output of the muting control circuit described in transmitting very of the first described triode, second output of the muting control circuit described in transmitting very of the second described triode.
6. a kind of microphone according to claim 1, is characterized in that described voice pickup circuit comprises the 11 electric capacity, the 12 electric capacity, the 13 electric capacity, the 14 electric capacity, the 17 resistance, the 18 resistance, the 19 resistance, the 20 resistance, the 21 resistance, the 22 resistance, the 23 resistance, the 3rd triode and microphone;
One end of the 11 described electric capacity, power supply is all accessed in one end of the 17 described resistance and one end of the 18 described resistance, the other end ground connection of the 11 described electric capacity, the other end of the 17 described resistance is connected with the emitter of the 3rd described triode, the other end of the 18 described resistance, one end of the 19 described resistance, one end of the 20 described resistance is connected with the base stage of the 3rd described triode, the other end of the 19 described resistance is the input of described voice pickup circuit, the other end of the 20 described resistance and the equal ground connection in one end of the 12 described electric capacity, the other end of the 12 described electric capacity, the collector electrode of the 3rd described triode is connected with one end of the 21 described resistance, the other end of the 21 described resistance, one end of the 13 described electric capacity is connected with one end of described microphone, the other end of described microphone, one end of the 23 described resistance is connected with one end of the 14 described electric capacity, the other end of the 14 described electric capacity is the output of described voice pickup circuit, the other end of the 13 described electric capacity is connected with one end of the 22 described resistance, the other end of the 22 described resistance is connected with the other end of the 23 described resistance.
7. a kind of microphone according to claim 1, is characterized in that described Single-to-differenticonversion conversion circuit comprises the 24 resistance, the 25 resistance, the 26 resistance, the 27 resistance, the 15 electric capacity, the 16 electric capacity, the 17 electric capacity and a JFET and manages;
One end of the 15 described electric capacity is connected with one end of the 24 described resistance and its link access power supply, the other end ground connection of the 15 described electric capacity, the other end of the 24 described resistance, one end of the 16 described electric capacity is connected with the source electrode of a described JFET pipe, the other end of the 16 described electric capacity is the first output of described Single-to-differenticonversion conversion circuit, the grid of a described JFET pipe is connected with one end of the 25 described resistance and its link is the input of described Single-to-differenticonversion conversion circuit, the other end of the 25 described resistance, one end of the 26 described resistance, one end of the 27 described resistance is connected with one end of the 17 described electric capacity, the other end of the 26 described resistance is connected with the drain electrode of a described JFET pipe, the other end of the 17 described electric capacity is the second output of described Single-to-differenticonversion conversion circuit, the other end ground connection of the 27 described resistance.
8. a kind of microphone according to claim 1, is characterized in that described amplification output circuit comprises the 28 resistance, the 29 resistance, the 30 resistance, the 31 resistance, the 32 resistance, the 33 resistance, the 34 resistance, the 35 resistance, the 18 electric capacity, the 19 electric capacity, the 20 electric capacity, the 21 electric capacity, the 4th triode and the 5th triode;
One end of the 28 described resistance, one end of the 30 described resistance, one end of the 34 described resistance is connected with one end of the 35 described resistance and its link access power supply, the other end of the 28 described resistance, one end of the 29 described resistance is connected with the base stage of the 4th described triode and its link is the second input of described amplification output circuit, the other end of the 30 described resistance, one end of the 31 described resistance is connected with the base stage of the 5th described triode and its link is the first input end of described amplification output circuit, the other end of the 31 described resistance and the equal ground connection of collector electrode of the 5th described triode, the other end of the 29 described resistance and the equal ground connection of collector electrode of the 4th described triode, the emitter of the 4th described triode, one end of the 33 described resistance is connected with one end of the 19 described electric capacity and its link is the second control end of described amplification output circuit, the emitter of the 5th described triode, one end of the 32 described resistance is connected with one end of the 18 described electric capacity and its link is the first control end of described amplification output circuit, the other end of the 32 described resistance, the other end of the 18 described electric capacity, the other end of the 34 described resistance is connected with one end of the 20 described electric capacity and its link is the first output of described amplification output circuit, the other end of the 19 described electric capacity, the other end of the 33 described resistance, the other end of the 35 described resistance is connected with one end of the 21 described electric capacity and its link is the second output of described amplification output circuit, the other end of the 20 described electric capacity and the other end ground connection of the 21 described electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510782893.4A CN105357610A (en) | 2015-11-16 | 2015-11-16 | Microphone |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510782893.4A CN105357610A (en) | 2015-11-16 | 2015-11-16 | Microphone |
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| CN105357610A true CN105357610A (en) | 2016-02-24 |
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Address after: 315105 Zhejiang province Ningbo Yinzhou investment and entrepreneurship center 818 integrity Road Applicant after: Audio Limited by Share Ltd Address before: 315104 Zhejiang province Ningbo Yinzhou investment and entrepreneurship center 818 integrity Road Applicant before: Ningbo Soundking Electronic Co., Ltd. |
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