CN211457336U - Microphone signal conditioner - Google Patents
Microphone signal conditioner Download PDFInfo
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- CN211457336U CN211457336U CN202020599521.4U CN202020599521U CN211457336U CN 211457336 U CN211457336 U CN 211457336U CN 202020599521 U CN202020599521 U CN 202020599521U CN 211457336 U CN211457336 U CN 211457336U
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- 230000005236 sound signal Effects 0.000 claims abstract description 90
- 230000003750 conditioning effect Effects 0.000 claims abstract description 28
- 238000001914 filtration Methods 0.000 claims abstract description 23
- 230000010355 oscillation Effects 0.000 claims abstract description 12
- 239000003990 capacitor Substances 0.000 claims description 197
- 239000013078 crystal Substances 0.000 claims description 30
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- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
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Abstract
The utility model discloses a microphone signal conditioner, which comprises a main chip, wherein the main chip is respectively connected with an antenna signal receiving and transmitting module, a clock oscillation circuit, a system power module, a data receiving module and a microphone signal processing module, wherein the antenna signal receiving and transmitting module is used for receiving sound signals, filtering the sound signals, transmitting the sound signals to the main chip, and receiving the microphone signals processed by the main chip and transmitting the microphone signals to the outside; the clock oscillation circuit is used for oscillating, timing and generating a time signal and transmitting the time signal to the main chip in real time; the system power supply module is used for supplying power to the main chip; the data receiving module is used for receiving an external data signal and sending the data signal to the main chip; and the microphone signal processing module is used for receiving and conditioning the sound signal of the microphone device and then sending the sound signal to the main chip, and is also used for receiving the sound signal sent by the main chip and sending the sound signal to the loudspeaker.
Description
Technical Field
The utility model relates to a function cell-phone microphone signal processing field specifically is microphone signal conditioner.
Background
The microphone, known as a microphone, is an energy conversion device for converting a sound signal into an electrical signal, and the microphone is a vibrating diaphragm which transmits sound vibration to the microphone to push a magnet at the inner side to form a variable current, and the variable current is sent to a following sound processing circuit for amplification processing.
In the functional mobile phone, after receiving the current signal of the microphone device, analysis processing can be carried out and the processed microphone signal is sent to the antenna to complete the transmission of sound to another functional mobile phone, which is an audio signal line, most importantly, the interference can not be received, the interference can be strung into the generating device, various noises are generated, the user experience is influenced, the same received sound signal also needs to resist the interference to improve the user experience, so how to resist the interference and stably and effectively transmit the microphone signal of the microphone device, and meanwhile, the stable and effective received sound signal becomes the problem to be solved urgently in the field of functional mobile phone microphone signal processing.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art and resist the relatively poor not enough of ability of interference when transmitting microphone signal and receiving sound signal, provide a microphone signal conditioner, resist the effectual reinforcing of ability of interference when making transmission microphone signal and receiving sound signal through the mode that the noise was disturbed in the filtering.
The purpose of the utility model is mainly realized through the following technical scheme:
the microphone signal conditioner comprises a main chip, wherein the main chip is respectively connected with an antenna signal transceiving module, a clock oscillation circuit, a system power supply module, a data receiving module and a microphone signal processing module,
the antenna signal transceiving module is used for receiving the sound signal, filtering the sound signal, sending the sound signal to the main chip, and receiving the microphone signal processed by the main chip and sending the microphone signal to the outside;
the clock oscillation circuit is used for oscillating, timing and generating a time signal and transmitting the time signal to the main chip in real time;
the system power supply module is used for supplying power to the main chip;
the data receiving module is used for receiving an external data signal and sending the data signal to the main chip;
the microphone signal processing module is used for receiving and conditioning a sound signal of the microphone device, sending the sound signal to the main chip, and also used for receiving the sound signal sent by the main chip and sending the sound signal to the loudspeaker;
the microphone signal processing module comprises a microphone signal input circuit, a sound signal output circuit and a microphone signal conditioning circuit, the microphone signal input circuit, the microphone signal conditioning circuit and the sound signal output circuit are all connected on a main chip, wherein,
the microphone signal input circuit is used for receiving a sound signal of the microphone device, filtering the sound signal and sending the sound signal to the main chip;
the microphone signal conditioning circuit is used for receiving the sound signal sent by the main chip, conditioning the sound signal and sending the conditioned sound signal back to the main chip;
and the sound signal output circuit is used for receiving the sound signal sent by the main chip, filtering the sound signal and sending the sound signal to the loudspeaker.
In the utility model, the sound signal is received by the antenna signal receiving and transmitting module, the sound signal is transmitted to the sound signal output circuit in the microphone signal processing module after being received, and the sound signal is played by the sound signal output circuit loudspeaker, and the microphone signal collected by the microphone device can be collected by the microphone input circuit in the microphone signal processing module, and then transmitted to the microphone signal conditioning circuit by the main chip to condition the microphone signal, and the conditioned microphone signal is transmitted to the signal conditioning module by the main chip and transmitted to the outside, the utility model discloses a filtering processing is carried out on the received sound signal and the transmitted microphone signal by the antenna signal receiving and transmitting module, effectively stabilizing and effectively transmitting the signal, in the microphone signal processing module, microphone signal input circuit and microphone signal conditioning circuit are effectual collects and handles the microphone signal to the stable main chip that sends to of microphone signal after will handling, sound signal output circuit can effectually export sound signal, the utility model discloses a mode that the noise was disturbed in the filtering makes the effectual reinforcing of ability of resisting the interference when transmitting the microphone signal and receiving sound signal.
Further, the microphone signal input circuit includes a resistor R17, a resistor R18, a resistor R19, a resistor R20, a capacitor C409, a capacitor C410, and a microphone input interface J20, wherein the resistor R20 and the capacitor C20 are connected in series, the other end of the resistor R20 opposite to the end connected to the capacitor C20 is connected to the main chip, the other end of the capacitor C20 opposite to the end connected to the resistor R20 is connected to the microphone input interface J20, the resistor R20 is connected to the resistor R20 in series, the other end of the resistor R20 opposite to the end connected to the resistor R20 is connected to a line between the capacitor C20 and the microphone input interface J20, the other end of the resistor R20 opposite to the end connected to the main chip, one end of the capacitor C410 is connected to a line between the capacitor C20 and the microphone input interface J20, the other end of the resistor R20 is connected to the capacitor C20 in series, and the other end connected to the capacitor C20 in series, and the capacitor C20, the other end of the capacitor C48 opposite to the end of the connecting resistor R31 is connected with the microphone input interface J18, the resistor R19 is connected with the resistor R20 in series, the other end of the resistor R19 opposite to the end of the connecting resistor R20 is connected with a line between the capacitor C48 and the microphone input interface J18, the other end of the resistor R20 opposite to the end of the connecting resistor R19 is grounded, one end of the capacitor C409 is connected with a line between the capacitor C48 and the microphone input interface J18, the other end of the capacitor C409 is grounded, one end of the capacitor C15 is connected with a line between the capacitor C47 and the microphone input interface J18, the other end of the capacitor C465 is connected with a line between the capacitor C48 and the microphone input interface J18, one end of the capacitor C50 is connected with a line between the resistor R17 and the resistor R18, and the other end of the capacitor R19.
The utility model discloses in, electric capacity C409 and the equal ground connection of electric capacity C410 in the microphone signal input circuit, play the filtering effect, a microphone signal for to the input filters, and the microphone signal passes through electric capacity C47 in microphone signal input circuit, electric capacity C48, resistance R30 and resistance R31's combined action, stable effectual microphone signal with receiving transmits the main chip, and the further processing of filtering with the microphone signal of resistance R19 and resistance R20 of ground connection, electric capacity C15 and electric capacity C50 play the effect of resisting pulse signal in the circuit, can effectually consume pulse signal through electric capacity C15 and electric capacity C50, thereby the protection microphone signal can not receive the interference.
Furthermore, the microphone signal conditioning circuit comprises a resistor R, a capacitor C and an internal power supply, wherein the resistor R, the capacitor C and the resistor R are sequentially connected in series, the other end of the resistor R, which is relatively connected with the end of the capacitor C, is connected with the main chip, the other end of the resistor R, which is relatively connected with the end of the capacitor C, is connected with the internal power supply, one end of the capacitor C is connected with a circuit between the capacitor C and the resistor R, the other end of the capacitor C is grounded, the resistor R, the capacitor C and the resistor R are sequentially connected in series, the other end of the resistor R, which is relatively connected with the end of the capacitor C, is connected with the end of the resistor R, one end of the capacitor C is connected with the circuit between the capacitor C and the resistor R, the other end of the capacitor R is grounded, the resistor R is connected with, one end of the capacitor C53 is connected to the end of the resistor R29 connected to the capacitor C49, and the other end is connected to the end of the resistor R28 connected to the capacitor C51.
The utility model provides a microphone signal conditioning circuit adopts internal power source to supply power, electric capacity C52 in the circuit, electric capacity C54 and electric capacity C55 are ground capacitance, electric capacity C52, electric capacity C54 and electric capacity C55 play the filtering action, in the microphone signal processing module, microphone signal conditioning circuit exists as supplementary microphone signal input circuit, play and further take care of the effect of sending in the main chip after the microphone signal, make the main chip can obtain more stable effectual microphone signal.
Further, the sound signal output circuit includes inductance L14, inductance L15, electric capacity C401, electric capacity C402, electric capacity C403 and speaker interface J8, inductance L14 one end is connected with the main chip, and its other end is connected with speaker interface J8, electric capacity C402 one end is connected on the circuit between inductance L14 and the main chip, and its other end ground connection, inductance L15 one end is connected with the main chip, and its other end is connected with speaker interface J8, electric capacity C403 one end is connected on the circuit between inductance L15 and the main chip, and its other end ground connection, electric capacity C401 one end is connected on the circuit between inductance L14 and the main chip, and its other end is connected on the circuit between inductance L15 and the main chip. The capacitor C402 and the capacitor C403 play a role in filtering, the capacitor C401 is used for eliminating pulse signals, and under the combined action of the inductor L14, the inductor L15, the capacitor C401, the capacitor C402 and the capacitor C403, sound signals can be guaranteed to be accurately and effectively played through the loudspeaker.
Furthermore, the antenna signal transceiving module comprises an inductor L1, a capacitor C24, a capacitor C77 and an antenna signal receiving circuit, wherein the inductor L1 and the antenna signal receiving circuit are connected in series, the inductor L1 is connected with the other end of the antenna signal receiving circuit end in a connection mode and is connected with the main chip, one end of the capacitor C24 is connected to a line between the inductor L1 and the main chip, the other end of the capacitor C77 is connected to the ground, one end of the capacitor C77 is connected to the line between the inductor L1 and the antenna signal receiving circuit, and the other end of the capacitor C77 is connected to the.
The antenna signal receiving and transmitting module in the utility model is provided with an antenna signal receiving circuit, which receives the sound signal and carries out filtering processing through the antenna signal receiving and transmitting module, after the antenna signal receiving and sending module carries out filtering processing, the sound signal is sent to the main chip, the main chip carries out primary quenching and tempering processing and then sends the sound signal to the microphone signal processing module and receives the attraction signal processed by the microphone signal processing module, playing through a loudspeaker, receiving the microphone signal of the microphone signal processing module by the main chip, and send the microphone signal to the outside through antenna signal receiving circuit in the antenna signal transceiver module, antenna signal transceiver module can make the sound signal that main chip received more stable and pure, and the mixed and disorderly interference when also having avoided the microphone signal to send causes the influence to the signal.
Further, the antenna signal receiving circuit includes an inductor L5, an inductor L6, an inductor L11, an inductor L12, a capacitor C3, a capacitor C34, and an antenna interface J3, where the capacitor C3, the capacitor C34, and the antenna interface are sequentially connected in series, the other end of the capacitor C3, which is opposite to the end connected to the capacitor C34, is connected to the inductor L1, one end of the inductor L5 is connected to a line between the inductor L1 and the capacitor C3, and the other end is grounded, one end of the inductor L6 is connected to a line between the capacitor C3 and the capacitor C34, and the other end is grounded, one end of the inductor L,11 is connected to a line between the capacitor C3 and the capacitor C34, and the other end of the inductor L12 is connected to a line between the antenna interface and the capacitor C34, and the other end of the inductor. The utility model provides an antenna signal receiving circuit carries out high frequency filtering through inductance L5, inductance L6, inductance L11 and inductance L12 ground connection respectively to the sound signal received and the microphone signal who sends, and after filtering, can stabilize effectual receipt and send sound signal and microphone signal.
Furthermore, the clock oscillation circuit comprises a crystal oscillator, a first crystal oscillator output pin and a second crystal oscillator output pin are arranged on the main chip, the first crystal oscillator output pin is connected with one end of the crystal oscillator, the second crystal oscillator output pin is connected with the other end of the crystal oscillator, and the crystal oscillator is grounded.
The crystal oscillator in the utility model is manufactured by utilizing the piezoelectric effect of the crystal, when alternating voltage is applied to two surfaces of the wafer, the wafer can be repeatedly and mechanically deformed to generate vibration, and the mechanical vibration can generate the alternating voltage in turn; when the frequency of the external alternating voltage is a certain specific value, the amplitude is obviously increased and is much larger than the amplitude under other frequencies, and resonance is generated, and the phenomenon is called piezoelectric resonance; the crystal oscillator produces the additional external clock circuit of oscillation, the utility model discloses in be an enlarged feedback circuit, then had clock oscillator, put external clock circuit in same encapsulation the inside with the crystal oscillator, all had 4 pins, two power cords provide the power for the clock circuit of the inside, provide the benchmark for the chronogenesis through clock oscillator circuit, coordinate each part orderly run in the main chip.
Further, the system power supply module comprises a transient voltage suppression diode T3 and a power supply, wherein the power supply is connected with the main chip, one end of the transient voltage suppression diode T3 is connected to a line between the power supply and the main chip, and the other end of the transient voltage suppression diode T3 is grounded. The utility model provides a system power module provides stable power supply for main chip.
Further, the data receiving module comprises a data positive signal end, a data negative signal end, a resistor R9 and a resistor R10, one end of the resistor R9 is connected with the main chip, the other end of the resistor R9 is connected with the data positive signal end, one end of the resistor R10 is connected with the main chip, and the other end of the resistor R10 is connected with the data negative signal end. The utility model provides a data receiving module is effectual with external data and main chip switch-on for the main chip can stabilize effectual external data that acquires.
To sum up, compared with the prior art, the utility model has the following beneficial effects:
(1) the utility model discloses an antenna signal transceiver module carries out filtering processing to the sound signal that receives and the microphone signal of sending, and is effectual with signal stabilization and effectual transmission, in microphone signal processing module, microphone signal input circuit and microphone signal conditioning circuit are effectual collects and handles the microphone signal to the stable main chip that sends to of microphone signal after will handling, sound signal output circuit can be effectual exports sound signal, the utility model discloses a mode that the noise was disturbed in the filtering makes the transmission microphone signal and receives the effectual reinforcing of ability of interference when sound signal.
(2) The utility model discloses in, microphone signal conditioning circuit exists as supplementary microphone signal input circuit, plays and further takes care of the effect of back sending to in the main chip with microphone signal for main chip can obtain more stable effectual microphone signal.
(3) The utility model discloses in, the microphone signal of microphone signal processing module is received to main chip to send the microphone signal to the antenna signal transceiver module in through antenna signal receiving circuit send the outside, antenna signal transceiver module can make main chip received sound signal more stable and pure, mixed and disorderly interference when also having avoided the microphone signal to send causes the influence to the signal.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic circuit diagram of the present invention;
fig. 2 is a circuit diagram of the microphone signal input circuit of the present invention;
fig. 3 is a circuit diagram of the signal conditioning circuit of the microphone of the present invention;
FIG. 4 is a circuit diagram of the sound signal output circuit of the present invention;
fig. 5 is a circuit diagram of the antenna signal receiving circuit of the present invention;
fig. 6 is a system block diagram of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
Example (b):
as shown in FIGS. 1-6, the main chip in the present embodiment is a chip with a model number of ASIC-SC6531F-175-0.4, and the U200-B processing part mainly involved in the present embodiment.
The microphone signal conditioner in the embodiment comprises a main chip, wherein the main chip is respectively connected with an antenna signal transceiving module, a clock oscillation circuit, a system power module, a data receiving module and a microphone signal processing module,
the antenna signal transceiving module is used for receiving the antenna signal, filtering and sending the antenna signal to the main chip; the antenna signal transceiving module comprises an inductor L1, a capacitor C24, a capacitor C77 and an antenna signal receiving circuit, wherein the inductor L1 is connected with the antenna signal receiving circuit in series, the other end of the inductor L1, which is relatively connected with the end of the antenna signal receiving circuit, is connected with the main chip, one end of the capacitor C24 is connected to a line between the inductor L1 and the main chip, the other end of the capacitor C24 is grounded, one end of the capacitor C77 is connected to a line between the inductor L1 and the antenna signal receiving circuit, and the other end of the capacitor C77 is grounded; the antenna signal receiving circuit comprises an inductor L5, an inductor L6, an inductor L11, an inductor L12, a capacitor C3, a capacitor C34 and an antenna interface J3, wherein the capacitor C3, the capacitor C34 and the antenna interface are sequentially connected in series, the other end of the capacitor C3 opposite to the end connected with the capacitor C34 is connected with the inductor L1, one end of the inductor L5 is connected to a line between the inductor L1 and the capacitor C3, the other end of the inductor L5 is grounded, one end of the inductor L6 is connected to a line between the capacitor C3 and the capacitor C34, the other end of the inductor L3911 is grounded, one end of the inductor L,11 is connected to a line between the capacitor C3 and the capacitor C34, the other end of the inductor L, one end of the inductor L12 is connected to a line between the antenna interface and the; the signal receiving module is connected with a BT-TRX pin of the main chip.
The clock oscillation circuit is used for oscillating, timing and generating a time signal and transmitting the time signal to the main chip in real time; the clock oscillation circuit comprises a crystal oscillator, a first crystal oscillator output pin and a second crystal oscillator output pin are arranged on the main chip, the first crystal oscillator output pin is connected with one end connected with the crystal oscillator, the second crystal oscillator output pin is connected with the other end connected with the crystal oscillator, and the crystal oscillator is grounded; the pins of the clock oscillation circuit connected with the main chip are a first crystal oscillator output pin (XO-P pin) and a second crystal oscillator output pin (XO-N pin).
The system power supply module is used for supplying power to the main chip; the system power supply module comprises a transient voltage suppression diode T3 and a power supply, wherein the power supply is connected with the main chip, one end of the transient voltage suppression diode T3 is connected to a circuit between the power supply and the main chip, and the other end of the transient voltage suppression diode T3 is grounded; the system power supply module is connected with a PBINT pin of the main chip, and a PRODT pin of the main chip is grounded.
The data receiving module is used for receiving an external data signal and sending the data signal to the main chip; the data receiving module comprises a data positive signal end, a data negative signal end, a resistor R9 and a resistor R10, one end of the resistor R9 is connected with the main chip, the other end of the resistor R3526 is connected with the data positive signal end, one end of the resistor R10 is connected with the main chip, and the other end of the resistor R10 is connected with the data negative signal end; the data receiving module is connected with a USB-DP pin and a USB-DM pin of the main chip.
The microphone signal processing module is used for receiving and conditioning a sound signal of the microphone device and then sending the sound signal to the main chip; still include electric capacity C11 and MICBIAS end in the microphone signal processing module, the sound input end is connected with the main chip, electric capacity C11 one end is connected on the circuit between MICBIAS end and the main chip, and its other end ground connection still is equipped with main earth connection on the main chip, and the pin of connecting is the AGNDVB pin.
The microphone signal processing module comprises a microphone signal input circuit, a sound signal output circuit and a microphone signal conditioning circuit, the microphone signal input circuit, the microphone signal conditioning circuit and the sound signal output circuit are all connected on a main chip, wherein,
the microphone signal input circuit is used for receiving a sound signal of the microphone device, filtering the sound signal and sending the sound signal to the main chip; the microphone signal input circuit comprises a resistor R17, a resistor R18, a resistor R19, a resistor R20, a capacitor C409, a capacitor C410 and a microphone input interface J20, wherein the resistor R20 and the capacitor C20 are connected in series, the other end of the resistor R20 opposite to the end connected with the capacitor C20 is connected with the main chip, the other end of the capacitor C20 opposite to the end connected with the resistor R20 is connected with the microphone input interface J20, the resistor R20 is connected with the resistor R20 in series, the other end of the resistor R20 opposite to the end connected with the resistor R20 is connected with a line between the capacitor C20 and the microphone input interface J20, the other end of the resistor R20 opposite to the end connected with the main chip, one end of the capacitor C36410 is connected with the line between the capacitor C20 and the main chip 20, the other end connected with the capacitor C20 in series, and the other end connected with the capacitor C20 in series, the other end of the capacitor C48 opposite to the end of the connecting resistor R31 is connected with the microphone input interface J18, the resistor R19 is connected with the resistor R20 in series, the other end of the resistor R19 opposite to the end of the connecting resistor R20 is connected with a line between the capacitor C48 and the microphone input interface J18, the other end of the resistor R20 opposite to the end of the connecting resistor R19 is grounded, one end of the capacitor C409 is connected with a line between the capacitor C48 and the microphone input interface J18, the other end of the capacitor C409 is grounded, one end of the capacitor C15 is connected with a line between the capacitor C47 and the microphone input interface J18, the other end of the capacitor C465 is connected with a line between the capacitor C48 and the microphone input interface J18, one end of the capacitor C50 is connected with a line between the resistor R17 and the resistor R18, and the other end of the capacitor R19; the microphone signal input circuit comprises an MIC-P end, an MIC-N end and an MICBIAS end, and is respectively connected with an MIC-P pin, an MIC-N pin and an MICBIAS pin of the main chip.
The microphone signal conditioning circuit is used for receiving the sound signal sent by the main chip, conditioning the sound signal and sending the conditioned sound signal back to the main chip; the microphone signal conditioning circuit comprises a resistor R4, a resistor R25, a resistor R28, a resistor R29, a capacitor C49, a capacitor C51, a capacitor C52, a capacitor C53, a capacitor C54, a capacitor C55 and an internal power supply, wherein the resistor R4, the capacitor C49 and the resistor R29 are sequentially connected in series, the other end, opposite to the end connected with the capacitor C29, of the resistor R29 is connected with a main chip, the connecting end in the circuit is an AUX-MIC-P end, the connecting pin is an HEADPIP pin, the other end, opposite to the end connected with the capacitor C29, of the resistor R29 is connected with the internal power supply, one end of the capacitor C29 is connected on a line between the capacitor C29 and the resistor R29, the other end of the capacitor C29 is grounded, the resistor R29, the other end, opposite to the end connected with the capacitor C29, the other end connected with the capacitor C29, one end of the capacitor C29 is connected with the AUX-MIC-N end, one end of the capacitor C55 is connected to a line between the capacitor C51 and the resistor R28, the other end of the capacitor C55 is grounded, the resistor R28 is connected to the end of the capacitor C51 and is connected to the main chip, the connection pin is the HEADMIC-IN pin, the resistor R6 is connected between the HEADMIC-IN pin and the microphone signal conditioning circuit to serve as a protection resistor, one end of the capacitor C53 is connected to the end of the resistor R29 connected to the capacitor C49, and the other end of the capacitor C53 is connected to the end of the resistor R28 connected to the capacitor C51.
The sound signal output circuit is used for receiving the conditioned sound signal sent by the main chip, filtering the conditioned sound signal and sending the conditioned sound signal to the loudspeaker; the sound signal output circuit comprises an inductor L14, an inductor L15, a capacitor C401, a capacitor C402, a capacitor C403 and a loudspeaker interface J8, one end of the inductor L14 is connected with the main chip, the connecting end is an REC-P end, the pin connected with the main chip is an REC-P pin, the other end of the capacitor C402 is connected with a loudspeaker interface J8, one end of the capacitor C402 is connected with a line between the inductor L14 and the main chip, the other end is grounded, one end of the inductor L15 is connected with the main chip, the connecting end is an REC-N end, the pin connected with the main chip is an REC-N pin, the other end of the capacitor C403 is connected with a loudspeaker interface J8, one end of the capacitor C403 is connected with a line between the inductor L15 and the main chip, the other end of the capacitor C401 is grounded, one end of the capacitor C401 is connected to a line between the inductor L14 and the main chip, and the other end of the capacitor C401 is connected to a line between the inductor L15 and the main chip.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. The microphone signal conditioner is characterized by comprising a main chip, wherein the main chip is respectively connected with an antenna signal transceiving module, a clock oscillation circuit, a system power module, a data receiving module and a microphone signal processing module,
the antenna signal transceiving module is used for receiving the sound signal, filtering the sound signal, sending the sound signal to the main chip, and receiving the microphone signal processed by the main chip and sending the microphone signal to the outside;
the clock oscillation circuit is used for oscillating, timing and generating a time signal and transmitting the time signal to the main chip in real time;
the system power supply module is used for supplying power to the main chip;
the data receiving module is used for receiving an external data signal and sending the data signal to the main chip;
the microphone signal processing module is used for receiving and conditioning a sound signal of the microphone device, sending the sound signal to the main chip, and also used for receiving the sound signal sent by the main chip and sending the sound signal to the loudspeaker;
the microphone signal processing module comprises a microphone signal input circuit, a sound signal output circuit and a microphone signal conditioning circuit, the microphone signal input circuit, the microphone signal conditioning circuit and the sound signal output circuit are all connected on a main chip, wherein,
the microphone signal input circuit is used for receiving a sound signal of the microphone device, filtering the sound signal and sending the sound signal to the main chip;
the microphone signal conditioning circuit is used for receiving the sound signal sent by the main chip, conditioning the sound signal and sending the conditioned sound signal back to the main chip;
and the sound signal output circuit is used for receiving the sound signal sent by the main chip, filtering the sound signal and sending the sound signal to the loudspeaker.
2. The microphone signal conditioner according to claim 1, wherein the microphone signal input circuit comprises a resistor R17, a resistor R18, a resistor R19, a resistor R20, a resistor R30, a resistor R31, a capacitor C15, a capacitor C47, a capacitor C48, a capacitor C50, a capacitor C409, a capacitor C410 and a microphone input interface J18, the resistor R30 and the capacitor C47 are connected in series, the other end of the resistor R30 opposite to the end connected with the capacitor C47 is connected with the main chip, the other end of the capacitor C47 opposite to the end connected with the resistor R47 is connected with the microphone input interface J47, the resistor R47 is connected with the resistor R47 in series, the other end of the resistor R47 opposite to the end connected with a line between the capacitor C47 and the microphone input interface J47, the other end of the resistor R47 opposite to the end connected with the main chip, one end of the capacitor C36410 is connected with a line between the capacitor C47 and the microphone input interface J47, the other end of the resistor R31 is grounded, the resistor R31 is connected with the capacitor C48 in series, the other end of the resistor R31, which is opposite to the end of the capacitor C48, is connected with the main chip, the other end of the capacitor C48, which is opposite to the end of the resistor R31, is connected with the microphone input interface J18, the resistor R19 is connected with the resistor R20 in series, the other end of the resistor R19, which is opposite to the end of the connecting resistor R20, is connected with a line between the capacitor C48 and the microphone input interface J18, the other end of the resistor R20, which is opposite to the end of the connecting resistor R19, is grounded, one end of the capacitor C409 is connected to the line between the capacitor C48 and the microphone input interface J18, the other end of the capacitor C15 is grounded, one end of the capacitor C15 is connected on the line between the capacitor C47 and the microphone input interface J18, the other end of the capacitor C50 is connected to a line between the capacitor C48 and the microphone input interface J18, one end of the capacitor C50 is connected to a line between the resistor R17 and the resistor R18, and the other end of the capacitor C50 is connected to a line between the resistor R19 and the resistor R20.
3. The microphone signal conditioner according to claim 1, wherein the microphone signal conditioning circuit comprises a resistor R4, a resistor R25, a resistor R28, a resistor R29, a capacitor C29 and an internal power supply, the resistor R29, the capacitor C29 and the resistor R29 are sequentially connected in series, the other end of the resistor R29 opposite to the end connected with the capacitor C29 is connected with the main chip, the other end of the resistor R29 opposite to the end connected with the capacitor C29 is connected with the internal power supply, one end of the capacitor C29 is connected with a line between the capacitor C29 and the resistor R29, the other end of the capacitor C29 is connected with the main chip, the other end of the resistor R29 opposite to the end connected with the capacitor C29 is connected with the resistor R29, the other end of the resistor R29 opposite to the end connected with the capacitor C29, the line between the capacitor C29 and the capacitor C29, the other end of the resistor is grounded, the resistor R28 is connected with the end of the capacitor C51 and is simultaneously connected with the main chip, one end of the capacitor C53 is connected with the end of the resistor R29 connected with the end of the capacitor C49, and the other end of the capacitor C53 is connected with the end of the resistor R28 connected with the capacitor C51.
4. The microphone signal conditioner of claim 1, wherein the sound signal output circuit comprises an inductor L14, an inductor L15, a capacitor C401, a capacitor C402, a capacitor C403, and a speaker interface J8, wherein the inductor L14 is connected to the main chip at one end and to the speaker interface J8 at the other end, the capacitor C402 is connected to the line between the inductor L14 and the main chip at one end and to ground at the other end, the inductor L15 is connected to the main chip at one end and to the speaker interface J8 at the other end, the capacitor C403 is connected to the line between the inductor L15 and the main chip at one end and to ground at the other end, the capacitor C401 is connected to the line between the inductor L14 and the main chip at one end and to the line between the inductor L15 and the main chip at the other end.
5. The microphone signal conditioner as claimed in claim 1, wherein the antenna signal transceiving module comprises an inductor L1, a capacitor C24, a capacitor C77 and an antenna signal receiving circuit, the inductor L1 is connected in series with the antenna signal receiving circuit, the inductor L1 is connected to the main chip opposite to the other end connected to the antenna signal receiving circuit, one end of the capacitor C24 is connected to a line between the inductor L1 and the main chip, the other end of the capacitor C24 is grounded, one end of the capacitor C77 is connected to a line between the inductor L1 and the antenna signal receiving circuit, and the other end of the capacitor C77 is grounded.
6. The microphone signal conditioner according to claim 5, wherein the antenna signal receiving circuit comprises an inductor L5, an inductor L6, an inductor L11, an inductor L12, a capacitor C3, a capacitor C34 and an antenna interface J3, the capacitor C3, the capacitor C34 and the antenna interface are sequentially connected in series, the other end of the capacitor C3 opposite to the end connected with the capacitor C34 is connected with the inductor L1, one end of the inductor L5 is connected to the line between the inductor L1 and the capacitor C3, the other end of the inductor L6 is connected to the line between the capacitor C3 and the capacitor C34, the other end of the inductor L is grounded, one end of the inductor L,11 is connected to the line between the capacitor C3 and the capacitor C34, the other end of the inductor L12 is connected to the line between the antenna interface and the capacitor C34, and the other end of the inductor L12 is grounded.
7. The microphone signal conditioner of claim 1, wherein the clock oscillator circuit comprises a crystal oscillator, the main chip is provided with a first crystal oscillator output pin and a second crystal oscillator output pin, the first crystal oscillator output pin is connected to one end of the crystal oscillator, the second crystal oscillator output pin is connected to the other end of the crystal oscillator, and the crystal oscillator is grounded.
8. The microphone signal conditioner of claim 1, wherein the system power supply module comprises a transient voltage suppression diode T3 and a power supply, the power supply is connected to the main chip, the transient voltage suppression diode T3 is connected at one end to a line between the power supply and the main chip, and at the other end to ground.
9. The microphone signal conditioner of claim 1, wherein the data receiving module comprises a data positive signal terminal, a data negative signal terminal, a resistor R9 and a resistor R10, wherein one end of the resistor R9 is connected to the main chip, and the other end of the resistor R10 is connected to the data negative signal terminal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020599521.4U CN211457336U (en) | 2020-04-20 | 2020-04-20 | Microphone signal conditioner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020599521.4U CN211457336U (en) | 2020-04-20 | 2020-04-20 | Microphone signal conditioner |
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| CN211457336U true CN211457336U (en) | 2020-09-08 |
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