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Price tag base station circuit and base station

A technology of price tag base station and base station, applied in the field of price tag base station circuit and base station, can solve the problems of slow download efficiency, affecting production and after-sales maintenance, etc., to achieve the effect of enhancing product strength, improving user experience, and ensuring reliability

Pending Publication Date: 2022-03-25
NUBIA TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When it is necessary to download the price tag base station through the smart terminal, it is necessary to disassemble the whole machine of the price tag base station, and artificially process the download information. The download efficiency is slow, which affects production and after-sales maintenance.

Method used

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  • Price tag base station circuit and base station
  • Price tag base station circuit and base station
  • Price tag base station circuit and base station

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] figure 1 It is the circuit diagram of the first embodiment of the price tag base station circuit of the present invention. This embodiment is a price tag base station circuit, which includes: system power supply VDD_5V, diode VD0, diode VD1, MCU power supply VCC_MCU, USB Vbus power supply, PMOS transistor VT1, NMOS transistor Q2, and NMOS transistor Q3. Wherein, the system power supply VDD_5V is connected to the anode of the diode VD0, and the cathode of the diode VD0 is connected to the MCU power supply VCC_MCU. The source of the PMOS transistor VT1 is connected to the USB Vbus power supply, the drain of the PMOS transistor VT1 is connected to the MCU power supply VCC_MCU through the diode VD1, and the control electrode of the PMOS transistor VT1 is connected to the source of the NMOS transistor Q2 Pole and connected in parallel with C1 through R1 to the USB Vbus power supply. The drain of the NMOS transistor Q2 is connected to the ground signal, and the control elec...

Embodiment 2

[0027] figure 2 It is the circuit diagram of the second embodiment of the price tag base station circuit of the present invention. Based on the above embodiment, when the system power supply VDD_5V is not powered, after the smart terminal is plugged into the USB cable, the USB Vbus power supply on the USB cable presents 5V Voltage, the 5V voltage of the USB Vbus power supply passes through the C3 capacitor to quickly boost the gate voltage of the NMOS transistor Q3 to 5V. When the gate voltage of the NMOS transistor Q3 starts to conduct during the rising process, when the voltage is turned on When it reaches the turn-on threshold, it is fully turned on, and the UBoot signal pin is a low-level signal.

[0028] In this embodiment, when the UBoot signal pin is a low-level signal, the 5V voltage of the USB Vbus power supply passes through the RC filter circuit R2C2, so that the gate voltage of the NMOS transistor Q2 is slowly boosted to 5V, so The gate voltage of the NMOS transi...

Embodiment 3

[0033] image 3 It is the circuit diagram of the third embodiment of the price tag base station circuit of the present invention. Based on the above embodiment, when the system power supply VDD_5V has been powered, after the smart terminal is plugged into the USB cable, the USB cable on the USB Vbus presents 5V voltage.

[0034] In this embodiment, the USB VBus 5V voltage passes through the C3 capacitor to quickly boost the gate voltage of the NMOS transistor Q3 to 5V. When the gate voltage of the NMOS transistor Q3 starts to conduct during the rising process, when the turn-on voltage reaches the turn-on When the threshold is fully turned on, the UBoot signal pin is a low level signal.

[0035] In this embodiment, when the UBoot signal pin is a low-level signal, the USB VBus 5V voltage passes through the RC filter circuit R2C2, so that the gate voltage of the NMOS transistor Q2 is slowly boosted to 5V, and the The gate voltage of the NMOS transistor Q2 starts to be turned on...

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PUM

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Abstract

The invention discloses a price tag base station circuit and a base station. The circuit comprises a system power supply VDD5V, a diode VD0, a diode VD1, an MCU power supply VCCMCU, a USB Vbus power supply, a PMOS tube VT1, an NMOS tube Q2 and an NMOS tube Q3. When the USB is inserted, the NMOS tube Q3 is conducted prior to the NMOQ2, so that a Uboot signal pin is changed into a low level in advance to enter a downloading mode in the power-on process of the MCU, and when the VDD5V is powered and inserted into the USB, the MCU still continues to work in a normal state. Therefore, the operation reliability of the MCU chip can be ensured, the production and downloading convenience can be improved, the after-sales maintenance is improved, the user experience is improved, and the product force is enhanced.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a price tag base station circuit and a base station. Background technique [0002] In the prior art, with the continuous development of intelligent terminal equipment, the application range of intelligent IoT equipment is also becoming wider and wider. Electronic price tag, as an intelligent IoT device, can display electronic tags for price information in supermarkets, convenience stores, pharmacies and other application places. Electronic price tags are mainly placed on shelves, which can replace the electronic display devices of traditional paper price tags. Each electronic shelf label is connected to the computer database of the shopping mall through a wired or wireless network, and the latest commodity prices are passed through the screen on the electronic shelf label. display. [0003] In the prior art, the working mode of the electronic price tag depends on the set pri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W88/08
CPCH04W88/08Y02D30/70
Inventor 蒋权
Owner NUBIA TECHNOLOGY CO LTD
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