Baseband transmission PODL circuit
The PODL circuit transmitted through baseband uses PHY chips and transformers to transmit signals and power supplies simultaneously, solving the space and complexity problems of traditional wiring methods, and achieving a circuit design with lower cost and higher integration.
Patent Information
- Application Number
- CN202420904876.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-26
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-04-26
AI Technical Summary
The traditional independent power cord and data cord layout methods face challenges such as space, weight and complexity in the process of miniaturization and integration of electronic devices. Dispersed sensors and equipment need to lay power cords and data cords separately, which increases material cost and engineering complexity.
The PODL circuit that adopts baseband transmission is electrically connected to the transformer through the first and second PHY chips, and the signal and power supply are transmitted simultaneously by using wires, simplifying the wiring process.
The synchronous transmission of signals and power supplies is realized, which reduces wiring costs and complexity, simplifies the circuit structure, and improves the integration of surrounding circuits.
Smart Images
Figure CN222621120U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of signals and power supplies, and in particular to a PODL circuit for baseband transmission. Background Art
[0002] At present, with the increasing miniaturization and integration of electronic devices, especially in the fields of Internet of Things (IoT), industrial automation, automotive electronics, smart buildings, etc., the traditional layout of independent power lines and data lines has begun to face challenges in terms of space, weight, complexity, etc. Moreover, providing power and data connections for dispersed sensors, actuators, monitoring equipment, etc. often requires laying power lines and data lines separately, which not only increases material costs, but also prolongs installation time and increases engineering complexity. Therefore, how to reduce the difficulty of signal and power wiring while ensuring the normal transmission of signals at each data terminal has higher research and development value. Utility Model Content
[0003] The main purpose of the present application is to provide a PODL circuit for baseband transmission to achieve co-line transmission of signals and power supplies and reduce wiring costs.
[0004] In order to achieve the above object, the present application provides a PODL circuit for baseband transmission, comprising:
[0005] A first PHY chip, wherein the first PHY chip is electrically connected to a first transformer;
[0006] a second PHY chip, wherein the second PHY chip is electrically connected to a second transformer;
[0007] The first transformer is electrically connected to the second transformer via a wire;
[0008] The first transformer is electrically connected to a power supply end device PSE through the wire, and the second transformer is electrically connected to a power receiving end device PD through the wire. The power supply end device PSE and the power receiving end device PD are connected through the wire.
[0009] Furthermore, the positive electrode and the negative electrode of the power supply end equipment PSE are respectively connected to inductors, and are respectively connected to the wires through the inductors.
[0010] Furthermore, the positive electrode and the negative electrode of the power receiving device PD are respectively connected to inductors, and are respectively connected to the wires through the inductors.
[0011] Furthermore, the transmitting end of the first PHY chip is communicatively connected to the primary winding of the transmitting end of the first transformer, and two output ends of the secondary winding of the transmitting end of the first transformer are connected to the wire through a resistor and a DC blocking capacitor.
[0012] Furthermore, one end of the secondary winding at the receiving end of the first transformer is connected to a wire connected to the positive electrode of the power supply end equipment PSE.
[0013] Furthermore, the middle tap of the secondary winding at the receiving end of the first transformer is communicatively connected with the middle tap of the secondary winding at the sending end so as to transmit the signal back to the negative pole of the wire through the secondary winding at the sending end, and at the same time, the primary winding at the receiving end of the first transformer completes signal reception.
[0014] Furthermore, the transmitting end of the second PHY chip is communicatively connected to the primary winding of the transmitting end of the second transformer, and two output ends of the secondary winding of the transmitting end of the second transformer are connected to the wire through a resistor and a DC blocking capacitor.
[0015] Furthermore, one end of the secondary winding at the receiving end of the second transformer is connected to a wire connected to the positive electrode of the powered device PD.
[0016] Furthermore, the middle tap of the secondary winding at the receiving end of the second transformer is communicatively connected with the middle tap of the secondary winding at the sending end so as to transmit the signal back to the negative pole of the wire through the secondary winding at the sending end, and at the same time, the primary winding at the receiving end of the second transformer completes signal reception.
[0017] Compared with the prior art, the PODL circuit for baseband transmission provided by the utility model has the following beneficial effects: using baseband transmission, the baseband signal is directly loaded onto a two-core power line for transmission, the circuit is simple, the peripheral circuit is highly integrated, and the cost is lower. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings:
[0019] Figure 1 Schematic diagram of the PODL circuit structure of baseband transmission in this embodiment. DETAILED DESCRIPTION
[0020] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.
[0021] It should be noted that the terms "first", "second", etc. in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.
[0022] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.
[0023] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.
[0024] In addition, the term "plurality" shall mean two or more.
[0025] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0026] refer to Figure 1 A baseband transmission PODL circuit is applied to two-wire network power transmission. The network signal is directly loaded onto the two-core power line for transmission. The circuit is composed of a power supply module and a power receiving module. The structure circuits of the power supply module and the power receiving module are mirror images. Specifically,
[0027] The power supply module includes a first PHY chip, and the first PHY chip is electrically connected to a first transformer T1, and the first transformer T1 can be a network transformer, etc. The transmitting end of the first PHY chip is communicatively connected to the primary winding of the transmitting end of the first transformer, and the output end of the secondary winding of the transmitting end of the first transformer is connected to the wire through a resistor and a DC blocking capacitor, respectively. Specifically, the first PHY chip is connected to the TD+ and TD- pins of the primary winding of the transmitting end of the first transformer T1 to transmit the TX+ and TX- signals of the first PHY, and then the TX+ and TX- signals are output from the secondary winding of the transmitting end of the first transformer T1. Further, the two ends of the secondary winding of the transmitting end of the first transformer T1 are respectively connected to a wire for transmitting the TX+ and TX- signals. Among them, the TX+ signal is output through the impedance resistor R1 set on the wire, and the TX- signal is output through the DC blocking capacitor C1 set on another wire.
[0028] The power receiving module includes a second PHY chip, and the second PHY chip is electrically connected to a second transformer T2, and the second transformer T2 can be a network transformer, etc. The second transformer T2 is connected to the first transformer T1 through a wire. Specifically, the transmitting end of the second PHY chip is connected to the primary winding of the transmitting end of the second transformer for communication. Specifically, the TX+ and TX- pins of the second PHY chip are correspondingly connected to the TD+ and TD- pins of the primary winding of the transmitting end of the second transformer T2, so as to transmit the TX+ and TX- signals of the second PHY chip, and then the TX+ and TX- signals are output from the secondary winding of the transmitting end of the second transformer T2. Further, the two ends of the secondary winding of the transmitting end of the second transformer T2 are correspondingly connected to the two wires connected to the secondary winding of the transmitting end of the first transformer T1. The output end of the secondary winding of the transmitting end of the second transformer is connected to the wire through a resistor and a DC blocking capacitor, respectively, wherein the TX+ signal is output through the impedance resistor R2 set on the wire, and the TX- signal is output through the DC blocking capacitor C2 set on another wire.
[0029] The wire connected to the 16th and 14th pins of the secondary winding of the transmitting end of the first transformer T1 is electrically connected to the power supply end device PSE, and the positive and negative electrodes of the power supply end device PSE are respectively connected to the inductors, and are respectively connected to the wires through the inductors. Specifically, the positive electrode of the power supply end device PSE is connected to the wire through the set inductor L1, and the connection point is the end of the impedance resistor R1 away from the first transformer T1, so as to apply PODL+ to the wire, and the negative electrode of the power supply end device PSE is connected to another wire through the set inductor L2, and the connection point is the end of the DC blocking capacitor C1 away from the first transformer T1, so as to apply PODL- to the wire.
[0030] The wire connected to the pins 16 and 14 of the secondary winding of the sending end of the second transformer T2 is electrically connected to the receiving device PD, and the positive and negative electrodes of the receiving device PD are respectively connected to inductors, and are respectively connected to the wires through the inductors. Specifically, the power supply device PSE is connected to the receiving device PD through a wire, and the positive electrode of the receiving device PD is connected to the wire through the set inductor L3, and the connection point is the end of the impedance resistor R2 away from the second transformer T2, so as to realize PODL+ on the receiving wire, and the negative electrode of the receiving device PD is connected to another wire through the set inductor L4, and the connection point is the end of the DC blocking capacitor C2 away from the second transformer T2, so as to realize PODL- on the receiving wire.
[0031] For signal reception, in the power supply end module, the positive signal PoDL+ of the wire is transmitted through the wire to pin 9 of the secondary winding of the receiving end of the first transformer T1, and the middle tap pin 10 of the secondary winding of the receiving end of the first transformer T1 is communicatively connected with the middle tap pin 15 of the secondary winding of the sending end, so as to realize the signal being transmitted back to the negative pole of the wire through the secondary winding of the sending end. At the same time, the primary winding of the receiving end of the first transformer T1 completes signal reception. Specifically, the RD+ and RD- pins of the primary winding of the receiving end are correspondingly connected to the RX+ and RX- pins of the first PHY chip.
[0032] In the power receiving end module, the positive signal PoDL+ of the wire is transmitted to pin 9 of the secondary winding of the receiving end of the second transformer T2 through the wire, and the middle tap pin 10 of the secondary winding of the receiving end of the second transformer T2 is communicatively connected with the middle tap pin 15 of the secondary winding of the sending end, so as to realize the signal being transmitted back to the negative pole of the wire through the secondary winding of the sending end. At the same time, the primary winding of the receiving end of the second transformer T2 completes signal reception. Specifically, the RD+ and RD- pins of the primary winding of the receiving end are correspondingly connected to the RX+ and RX- pins of the second PHY chip.
[0033] The specific manner of executing the operation of each unit in the above embodiment has been described in detail in the embodiment of the method, and will not be elaborated here.
[0034] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A PODL circuit for baseband transmission, characterized in that: include: A first PHY chip, wherein the first PHY chip is electrically connected to a first transformer; a second PHY chip, wherein the second PHY chip is electrically connected to a second transformer; The first transformer is electrically connected to the second transformer via a wire; The first transformer is electrically connected to a power supply end device PSE through the wire, and the second transformer is electrically connected to a power receiving end device PD through the wire. The power supply end device PSE and the power receiving end device PD are connected through the wire.
2. The PODL circuit for baseband transmission as claimed in claim 1, characterized in that: The positive electrode and the negative electrode of the power supply end equipment PSE are respectively connected to inductors, and are respectively connected to the wires through the inductors.
3. The PODL circuit for baseband transmission as claimed in claim 2, characterized in that: The positive electrode and the negative electrode of the power receiving device PD are respectively connected to inductors, and are respectively connected to the wires through the inductors.
4. The PODL circuit for baseband transmission as claimed in claim 2, characterized in that: The transmitting end of the first PHY chip is communicatively connected to the primary winding of the transmitting end of the first transformer, and two output ends of the secondary winding of the transmitting end of the first transformer are connected to the wire through a resistor and a DC blocking capacitor.
5. The PODL circuit for baseband transmission as claimed in claim 4, characterized in that: One end of the secondary winding at the receiving end of the first transformer is connected to a wire connected to the positive electrode of the power supply end equipment PSE.
6. The PODL circuit for baseband transmission as claimed in claim 5, characterized in that: The middle tap of the secondary winding at the receiving end of the first transformer is communicatively connected with the middle tap of the secondary winding at the sending end so that the signal is transmitted back to the negative pole of the wire through the secondary winding at the sending end. At the same time, the primary winding at the receiving end of the first transformer completes signal reception.
7. The PODL circuit for baseband transmission as claimed in claim 3, characterized in that: The transmitting end of the second PHY chip is communicatively connected to the primary winding of the transmitting end of the second transformer, and two output ends of the secondary winding of the transmitting end of the second transformer are connected to the wire through a resistor and a DC blocking capacitor.
8. The PODL circuit for baseband transmission as claimed in claim 7, characterized in that: One end of the secondary winding at the receiving end of the second transformer is connected to a wire connected to the positive electrode of the powered device PD.
9. The PODL circuit for baseband transmission as claimed in claim 8, characterized in that: The middle tap of the secondary winding at the receiving end of the second transformer is communicatively connected with the middle tap of the secondary winding at the sending end so that the signal is transmitted back to the negative pole of the wire through the secondary winding at the sending end. At the same time, the primary winding at the receiving end of the second transformer completes signal reception.