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A bus powered circuit

A power supply circuit and bus technology, applied in the field of circuits, can solve the problem of not being able to meet 9V and 32V at the same time, and achieve the effect of high precision and temperature characteristics

Active Publication Date: 2017-10-10
CRM ICBG (WUXI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that, figure 1 The structure in is only suitable for a narrower bus power supply voltage range, and cannot meet the requirements of 9V and 32V at the same time

Method used

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  • A bus powered circuit
  • A bus powered circuit
  • A bus powered circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment one: this embodiment combines the attached image 3 , attached Figure 5 And attached Figure 6 To illustrate, the current limiting source circuit 8 in this embodiment consists of a third resistor (R3), a fourth resistor (R4), a voltage regulator tube (ZD), a first NMOS tube (N1), a second NMOS tube (N2) , a third NMOS transistor (N3), a first PMOS transistor (P1), a second PMOS transistor (P2), a third PMOS transistor (P3), and a bias VB generating circuit 9. One end of the third resistor is connected to the negative electrode of the voltage regulator tube, the other end of the third resistor is connected to the positive line of the bus, and the gate of the first NMOS transistor is connected to the voltage regulator tube. Negative connection, the drain of the first NMOS transistor is connected to the drain of the second PMOS transistor, the source of the first NMOS transistor is connected to the source of the first PMOS transistor, and the second PMOS tran...

Embodiment 2

[0028] Embodiment two: this embodiment combines the attached Figure 4 And attached Figure 5 To illustrate, the current limiting source circuit 8 in this embodiment consists of a third resistor (R3), a fourth resistor (R4), a sixth resistor (R6), a voltage regulator tube (ZD), a first NMOS tube (N1), The second NMOS transistor (N2), the first PMOS transistor (P1), the second PMOS transistor (P2), and the third PMOS transistor (P3) are formed. One end of the third resistor is connected to the negative electrode of the voltage regulator tube, the other end of the third resistor is connected to the positive line of the bus, and the gate of the first NMOS transistor is connected to the voltage regulator tube. Negative connection, the drain of the first NMOS transistor is connected to the drain of the second PMOS transistor, the source of the first NMOS transistor is connected to the source of the first PMOS transistor, and the second PMOS transistor The source of the transistor...

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PUM

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Abstract

The invention relates to a circuit, particularly to a bus power supply circuit. The bus power supply circuit comprises a positive wire of a bus, a negative wire of the bus, a high-voltage power supply generating circuit, a Vcc generating circuit, an other needed power supply generating circuit, a CPU, a functional circuit, a receiving circuit and a sending circuit, wherein one end of the Vcc generating circuit is connected with the negative end of a diode, and the other end of the Vcc generating circuit is connected with the negative wire; one end of an energy-storage capacitor is connected with the negative end of the diode, and the other end of the energy-storage capacitor is grounded; the Vcc generating circuit is also connected in parallel with a second capacitor; the other needed power supply generating circuit, the CPU, the functional circuit, the receiving circuit and the sending circuit are all connected with the Vcc generating circuit; the CPU is also connected with the other needed power supply generating circuit, the functional circuit, the receiving circuit and the sending circuit; the receiving circuit and the sending circuit are also connected with the positive wire. According to the bus power supply circuit, electric current limit value can be reasonably set in the whole power supply voltage range, so that the flexibility of voltage modulation can be improved.

Description

technical field [0001] The invention relates to a circuit, in particular to a bus power supply circuit. Background technique [0002] In the bus power supply technology, the master and a certain number of slaves are connected through two cables, and all the slaves are connected in parallel to the bus, and obtain power through the bus. At the same time, the bus is also used as a signal for the communication between the master and the slaves. Wire. When the master sends data to the slave, it adopts the bus voltage modulation method, that is, changes the bus voltage value to transmit data; and when the slave sends data to the master, it uses the bus current modulation method, that is, the slave passes through the slave bus. An additional amount of current is drawn to transfer data. Powered by the bus, all slave devices do not need to be equipped with batteries, and do not need to be connected to a separate power supply. The installation and maintenance costs are low, and envi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F3/26
CPCG05F3/265
Inventor 曾洁琼张天舜王磊邱旻韡周宇捷
Owner CRM ICBG (WUXI) CO LTD