CN221283188U - Bluetooth module circuit - Google Patents
Bluetooth module circuit Download PDFInfo
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- CN221283188U CN221283188U CN202323333906.9U CN202323333906U CN221283188U CN 221283188 U CN221283188 U CN 221283188U CN 202323333906 U CN202323333906 U CN 202323333906U CN 221283188 U CN221283188 U CN 221283188U
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- 239000003990 capacitor Substances 0.000 claims abstract description 45
- 239000013078 crystal Substances 0.000 claims description 12
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Abstract
A Bluetooth module circuit comprises an MCU; the MCU is provided with a port VDD-FLASH which is grounded through a capacitor C2 and a capacitor C3 respectively; the MCU is also provided with a port VCC, and the port VCC is grounded through a capacitor C4, a capacitor C5, a capacitor C7 and a capacitor C8 respectively. The capacitor C2 is 1uF, the capacitor C3 is 100uF, the capacitor C4 is 10uF, the capacitor C7 is 1uF, and the capacitor C8 is 100uF.
Description
Technical Field
The utility model relates to the field of Bluetooth modules, in particular to a Bluetooth module circuit.
Background
Bluetooth antennas are important and necessary components for transmitting and receiving electromagnetic wave energy in wireless communication systems, but existing bluetooth modules have the disadvantage of large power supply noise.
Disclosure of utility model
In order to solve the above problems, the present technical solution provides a bluetooth module circuit.
In order to achieve the above purpose, the technical scheme is as follows:
a Bluetooth module circuit comprises an MCU;
The MCU is provided with a port VDD-FLASH which is grounded through a capacitor C2 and a capacitor C3 respectively;
The MCU is also provided with a port VCC, and the port VCC is grounded through a capacitor C4, a capacitor C5, a capacitor C7 and a capacitor C8 respectively.
In this embodiment, the capacitance C2 is 1uF, the capacitance C3 is 100uF, the capacitance C4 is 10uF, the capacitance C7 is 1uF, and the capacitance C8 is 100uF.
In this embodiment, the device further includes a crystal oscillator U2, where an input end of the crystal oscillator U2 is connected to the MCU, and an output end of the crystal oscillator U2 is also connected to the MCU, and the input end is further grounded through a capacitor C14, and the output end is grounded through a capacitor C11.
In this embodiment, the MCU is provided with a port VDD-PA and a port RFIOP, the port VDD-PA is connected to the port RFIOP through an inductor L1, the inductor L1 is further connected to one end of the capacitor C15, and the other end is used to connect to an antenna.
In this embodiment, the MCU is connected to the diode LED1 through the resistor R4, and one end of the diode LED1 is grounded.
Because the power supply noise generally contains high-frequency alternating current components, the capacitor added by the application has the characteristic of through alternating current and direct current, so that the high-frequency noise components can be removed, and the noise reduction effect is realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are required to be used in the description of the embodiments will be briefly described below.
Fig. 1 is a schematic structural view of an embodiment of the present utility model.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Referring to fig. 1, a bluetooth module circuit includes an MCU;
The MCU is provided with a port VDD-FLASH which is grounded through a capacitor C2 and a capacitor C3 respectively;
The MCU is also provided with a port VCC, and the port VCC is grounded through a capacitor C4, a capacitor C5, a capacitor C7 and a capacitor C8 respectively. The power supply noise generally contains a high-frequency alternating current component, and the capacitor has a characteristic of passing through and blocking, so that the high-frequency noise component can be removed, and a noise reduction effect can be realized.
In this embodiment, the capacitance C2 is 1uF, the capacitance C3 is 100uF, the capacitance C4 is 10uF, the capacitance C7 is 1uF, and the capacitance C8 is 100uF.
In this embodiment, the device further includes a crystal oscillator U2, where an input end of the crystal oscillator U2 is connected to the MCU, and an output end of the crystal oscillator U2 is also connected to the MCU, and the input end is further grounded through a capacitor C14, and the output end is grounded through a capacitor C11. Stabilizing circuit frequency: the oscillation frequency can be adjusted to be close to or equal to the nominal frequency by means of a parallel capacitance.
In this embodiment, the MCU is provided with a port VDD-PA and a port RFIOP, the port VDD-PA is connected to the port RFIOP through an inductor L1, the inductor L1 is further connected to one end of the capacitor C15, and the other end is used to connect to an antenna. Impedance matching is achieved through L1 and C15, so that signal reflection and power consumption are reduced to the greatest extent, transmission efficiency and coverage are improved, and signal transmission efficiency and receiving quality are improved.
In this embodiment, the MCU is connected to the diode LED1 through the resistor R4, and one end of the diode LED1 is grounded, and when in operation, the indicator light is turned on.
The foregoing description of the preferred embodiments of the present application is not intended to limit the scope of the application, but rather is presented in the claims.
Claims (5)
1. A Bluetooth module circuit is characterized by comprising an MCU;
The MCU is provided with a port VDD-FLASH which is grounded through a capacitor C2 and a capacitor C3 respectively;
The MCU is also provided with a port VCC, and the port VCC is grounded through a capacitor C4, a capacitor C5, a capacitor C7 and a capacitor C8 respectively.
2. The bluetooth module circuit according to claim 1, wherein: the capacitor C2 is 1uF, the capacitor C3 is 100uF, the capacitor C4 is 10uF, the capacitor C7 is 1uF, and the capacitor C8 is 100uF.
3. The bluetooth module circuit according to claim 1, wherein: the crystal oscillator comprises a MCU, and is characterized by further comprising a crystal oscillator U2, wherein the input end of the crystal oscillator U2 is connected with the MCU, the output end of the crystal oscillator U2 is also connected with the MCU, the input end of the crystal oscillator U is grounded through a capacitor C14, and the output end of the crystal oscillator U is grounded through a capacitor C11.
4. The bluetooth module circuit according to claim 1, wherein: the MCU is provided with a port VDD-PA and a port RFIOP, the port VDD-PA is connected with the port RFIOP through an inductor L1, the inductor L1 is also connected with one end of a capacitor C15, and the other end is used for being connected with an antenna.
5. The bluetooth module circuit according to claim 1, wherein: the MCU is connected with the diode LED1 through the resistor R4, and one end of the diode LED1 is grounded.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221283188U true CN221283188U (en) | 2024-07-05 |
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