阅读说明：本技术 小蜜蜂啸叫抑制电路 (Small bee howling suppression circuit ) 是由 熊浩 胡鹏 张洋 温长康 于 2019-10-26 设计创作，主要内容包括：本发明专利提供小蜜蜂啸叫抑制电路,其包括对偶输入MOSFET Q1(1)、电阻R1(2)、电容C1(3)、电阻R2(4)、电容C2(5)、可变电容VC1(6)、电解电容C3(7)。本发明专利将麦克风采集到的信号通过正向信号输入端和反向信号输入端传给对偶输入MOSFET Q1(1),放大信号经过电阻R1(2)、电容C1(3)组成的低通滤波电路滤除9KHz以上高频信号,经过电阻R2(4)、电容C2(5)、可变电容VC1(6)组成的低通滤波电路滤除8KHz以上高频信号,最后通过电解电容C3(7)滤除低频杂波信号,输出音频信号,以此消除反复反馈放大产生的高频啸叫音。(The invention provides a small bee howling suppression circuit which comprises a dual input MOSFET Q1 (1), a resistor R1 (2), a capacitor C1 (3), a resistor R2 (4), a capacitor C2 (5), a variable capacitor VC1 (6) and an electrolytic capacitor C3 (7). The invention transmits signals collected by a microphone to a dual input MOSFET Q1 (1) through a forward signal input end and a reverse signal input end, amplified signals pass through a low-pass filter circuit consisting of a resistor R1 (2) and a capacitor C1 (3) to filter high-frequency signals above 9KHz, pass through a low-pass filter circuit consisting of a resistor R2 (4), a capacitor C2 (5) and a variable capacitor VC1 (6) to filter high-frequency signals above 8KHz, and finally pass through an electrolytic capacitor C3 (7) to filter low-frequency clutter signals and output audio signals, so that high-frequency howling sound generated by repeated feedback amplification is eliminated.)

1. Bee whistle suppression circuit, its characterized in that: the circuit comprises a dual input MOSFET Q1 (1), a resistor R1 (2), a capacitor C1 (3), a resistor R2 (4), a capacitor C2 (5), a variable capacitor VC1 (6) and an electrolytic capacitor C3 (7); the +5VDC is connected with the end of a dual input MOSFET Q1 (1) S1; the dual input MOSFET Q1 (1) G1 is terminated at the inverted signal input end; the dual input MOSFET Q1 (1) G2 terminates the positive signal input; the dual input MOSFET Q1 (1) D1 and D2 is terminated at the left end of a resistor R1 (2); the right end of the resistor R1 (2) is connected with the anode of a capacitor C1 (3) and the left end of a resistor R2 (4); the right end of the resistor R2 (4) is connected with the anode of a capacitor C2 (5), the upper end of a variable capacitor VC1 (7) and the cathode of an electrolytic capacitor C1 (8); the anode of the electrolytic capacitor C1 (8) is connected with an audio information output end; the ground is connected with the S2 end of the dual input MOSFET Q1 (1), the cathode of the capacitor C1 (3), the cathode of the capacitor C2 (5) and the lower end of the variable capacitor VC1 (6); signals collected by the microphone are transmitted to a dual input MOSFET Q1 (1) through a forward signal input end and a reverse signal input end, amplified signals pass through a low-pass filter circuit consisting of a resistor R1 (2) and a capacitor C1 (3) to filter high-frequency signals above 9KHz, pass through a low-pass filter circuit consisting of a resistor R2 (4), a capacitor C2 (5) and a variable capacitor VC1 (6) to filter high-frequency signals above 8KHz, and finally low-frequency clutter signals are filtered through an electrolytic capacitor C3 (7), and audio signals are output, so that high-frequency howling sounds generated by repeated feedback amplification are eliminated.

2. The bee howling suppression circuit of claim 1, wherein: the dual input MOSFET Q1 (1) is model DMG4511SK 4.

3. The bee howling suppression circuit of claim 1, wherein: the types of the resistor R1 (2) and the resistor R2 (4) are thin-film high-precision resistors, the precision is 1/1000, and the resistance value is 1K Ώ.

4. The bee howling suppression circuit of claim 1, wherein: the capacitor C1 (3) is a 13uF patch type tantalum capacitor.

5. The bee howling suppression circuit of claim 1, wherein: the capacitor C2 (5) is a 16uF patch type tantalum capacitor.

6. The bee howling suppression circuit of claim 1, wherein: the variable capacitor VC1 (6) is a 10nF adjustable capacitor.

7. The bee howling suppression circuit of claim 1, wherein: the electrolytic capacitor C3 (7) is a 330uf tantalum capacitor.

Technical Field

The invention relates to a small bee howling suppression circuit, and belongs to the technical field of electronics.

Background

At present, shared bicycles are used quite , no matter shared bicycles of any brand, the shared bicycles can be unlocked and locked through remote control, a rechargeable battery supplies power inside the shared bicycles naturally, the power supply voltage is +6VDC, if the shared bicycles are locked by a switch , energy is wasted, and the shared bicycles are not used for auxiliary braking of the shared bicycles, so that the braking is more sensitive, and meanwhile, the energy is reasonably utilized.

Disclosure of Invention

In order to solve the problems, the invention provides a small bee howling suppression circuit. The circuit design is very simple and concise, the shared bicycle auxiliary brake control circuit is realized by using the least devices, the minimum volume and the extremely low cost, the brake is more flexible after the circuit is used, the force applied by a hand brake can be reduced by more than 50%, and a rider can better enjoy the riding process.

In order to achieve the purpose, the technical scheme includes that the microphone noise suppression device comprises a dual input MOSFET Q1 (1), a resistor R1 (2), a capacitor C1 (3), a resistor R2 (4), a capacitor C2 (5), a variable capacitor VC1 (6) and an electrolytic capacitor C3 (7), signals collected by a microphone are transmitted to the dual input MOSFET Q1 (1) through a forward signal input end and a reverse signal input end, amplified signals are filtered by a low-pass filter circuit formed by the resistor R1 (2) and the capacitor C2 (3) to remove high-frequency signals above 9KHz, high-frequency signals above 8KHz are filtered by a low-pass filter circuit formed by the resistor R2 (4) and the capacitor C3 (5), is filtered by a filter circuit formed by the resistor R3 (6) and the variable capacitor VC1 (7) to remove high-frequency signals between 7KHz, and finally low-frequency signals are filtered by the electrolytic capacitor C1 (8) to output audio signals, and high-frequency howling generated by repeated feedback amplification is eliminated.

, the +5VDC is connected with the end of a dual input MOSFET Q1 (1) S1, the dual input MOSFET Q1 (1) G1 is connected with a reverse signal input end, the dual input MOSFET Q1 (1) G2 is connected with a forward signal input end, the dual input MOSFET Q1 (1) D1 and D2 are connected with the left end of a resistor R1 (2), the right end of the resistor R1 (2) is connected with the anode of a capacitor C1 (3) and the left end of a resistor R2 (4), the right end of the resistor R2 (4) is connected with the anode of a capacitor C2 (5), the upper end of a variable capacitor VC1 (7) and the cathode of an electrolytic capacitor C1 (8), the anode of the electrolytic capacitor C1 (8) is connected with an audio information output end, and the ground is connected with the end of a dual input MOSFET Q1 (1) S2, the cathode of the capacitor C1 (3), the cathode of the capacitor C2 (1 and the lower end of the variable capacitor VC 366;

the model of the comparator U1 (2) is LM 339.

The model of the NPN type triode Q1 (3) is 2N 6660.

The invention has the advantages that the sharing of the auxiliary brake of the bicycle is realized with extremely low cost, the cost performance is extremely high, the brake sensitivity is greatly improved, and the use value of pushing is very high.

Drawings

In order to more clearly illustrate the embodiments of the patent of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the patent of the present invention, and other drawings can be obtained by those skilled in the art without paying attention and inventive labor.

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only partial embodiments of the present invention , rather than all embodiments.

As shown in fig. 1, the dual input MOSFET Q1 (1), a resistor R1 (2), a capacitor C1 (3), a resistor R2 (4), a capacitor C2 (5), a variable capacitor VC1 (6), and an electrolytic capacitor C3 (7). Signals collected by the microphone are transmitted to a dual input MOSFET Q1 (1) through a forward signal input end and a reverse signal input end, amplified signals pass through a low-pass filter circuit consisting of a resistor R1 (2) and a capacitor C1 (3) to filter high-frequency signals above 9KHz, pass through a low-pass filter circuit consisting of a resistor R2 (4), a capacitor C2 (5) and a variable capacitor VC1 (6) to filter high-frequency signals above 8KHz, and finally low-frequency clutter signals are filtered through an electrolytic capacitor C3 (7), and audio signals are output, so that high-frequency howling sounds generated by repeated feedback amplification are eliminated. The +5VDC is connected with the end of a dual input MOSFET Q1 (1) S1; the dual input MOSFET Q1 (1) G1 is terminated at the inverted signal input end; the dual input MOSFET Q1 (1) G2 terminates the positive signal input; the dual input MOSFET Q1 (1) D1 and D2 is terminated at the left end of a resistor R1 (2); the right end of the resistor R1 (2) is connected with the anode of a capacitor C1 (3) and the left end of a resistor R2 (4); the right end of the resistor R2 (4) is connected with the anode of a capacitor C2 (5), the upper end of a variable capacitor VC1 (7) and the cathode of an electrolytic capacitor C1 (8); the anode of the electrolytic capacitor C1 (8) is connected with an audio information output end; the ground is connected with the S2 end of the dual input MOSFET Q1 (1), the cathode of the capacitor C1 (3), the cathode of the capacitor C2 (5) and the lower end of the variable capacitor VC1 (6); the model of the comparator U1 (2) is LM 339. The model of the NPN type triode Q1 (3) is 2N 6660.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.