CN212012650U - Main-end processing sub-circuit, slave-end processing sub-circuit and POC circuit of POC circuit - Google Patents
Main-end processing sub-circuit, slave-end processing sub-circuit and POC circuit of POC circuit Download PDFInfo
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- CN212012650U CN212012650U CN202021159500.7U CN202021159500U CN212012650U CN 212012650 U CN212012650 U CN 212012650U CN 202021159500 U CN202021159500 U CN 202021159500U CN 212012650 U CN212012650 U CN 212012650U
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Abstract
The utility model provides a sub-circuit is handled to the main terminal of POC circuit, in the sub-circuit is handled to the slave end of POC circuit and the POC circuit, the main terminal power connects first coaxial cable connector behind first diode and the first inductance that concatenates in proper order, the LC resonance that the bypass electric capacity that just can be to first inductance and main terminal power produced through the first diode of joining in series suppresses the elimination, do benefit to the transmission of main terminal signal, the direct current from second coaxial cable connector inserts the slave end power supply behind the second inductance and the second diode that concatenate in proper order, the LC resonance that the bypass electric capacity that just can be to second inductance and slave end power produced through the second diode of joining in series suppresses the elimination, do benefit to the transmission of slave end signal; from the main end to the slave end, the direct-current power supply only passes through the first diode and the second diode additionally, so that the voltage drop is small and the power consumption is low; the influence of LC resonance is eliminated through a simple circuit structure and a small number of components, complex calculation and debugging are not needed, the circuit design difficulty is low, and the cost is low.
Description
Technical Field
The utility model relates to a power supply technical field especially relates to a subcircuit is handled to the main terminal of POC circuit, POC circuit's slave end handles subcircuit and POC circuit.
Background
In the transmission process of the Coaxial cable, signals (including video signals, control signals, etc.) and a dc Power supply are transmitted to supply Power to the slave end, that is, the signals and the Power supply are combined together and transmitted on a Coaxial cable, which is generally called as Power Over Coax (POC). The transmission mode saves cost and construction time and improves product benefits.
However, there are still many deficiencies in current POC circuits:
1) in the first scheme of the POC circuit, an analog signal is connected to an output terminal (or an input terminal) through a capacitor, a dc power supply is connected to the output terminal (the input terminal) through an inductor and a diode connected in parallel, the analog signal and the dc power supply are separated and transmitted simultaneously through the output terminal (or the input terminal), but because the dc power supply has a plurality of capacitors on a plane, the inductor and the capacitors form LC resonance, the transmitted analog signal is abnormal, and when the frequency of the analog signal is near the LC resonance frequency, the amplitude attenuation of the analog signal is large, and the waveform is deformed or even wrong;
2) in the second scheme of the POC circuit, in order to further reduce the mutual influence between the analog signal and the dc power supply, on the basis of the first scheme of the POC circuit, a superposition circuit having high impedance to the analog signal is added in an input or output path of the dc power supply, but the number of components used in the scheme is large, the design and debugging difficulty is large, the current path needs to additionally pass through other components, the voltage drop is large, and the power consumption is also large.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned shortcomings of the prior art, the present invention is directed to a new POC solution for solving the above-mentioned problems in the prior art.
To achieve the above and other related objects, first, the present invention provides a main-side processing sub-circuit of a POC circuit, for processing a main-side signal of the POC circuit and transmitting a direct current provided by a main-side power supply, including: the first capacitor, the first diode, the first inductor, the first resistor and the first coaxial cable connector; one end of the first capacitor is connected with the main end signal, and the other end of the first capacitor is connected with the first coaxial cable connector; the main end power supply is connected with the first coaxial cable connector after passing through the first diode and the first inductor which are sequentially connected in series, the first resistor is connected with the first inductor in parallel, wherein the anode of the first diode is connected with the main end power supply, and the cathode of the first diode is connected with the first inductor.
Optionally, the main-end processing sub-circuit of the POC circuit further includes a first magnetic bead connected in series between the first inductor and the first coaxial cable connector.
To achieve the above and other related objects, and in a second aspect, the present invention provides a slave processing sub-circuit of a POC circuit, for processing a slave signal of the POC circuit and receiving and processing a direct current power through a slave power supply, including: the second capacitor, the second diode, the second inductor, the second resistor and the second coaxial cable connector; one end of the second capacitor is connected with the slave end signal, and the other end of the second capacitor is connected with the second coaxial cable connector; the direct current from the second coaxial cable connector is connected to the slave power supply after passing through the second inductor and the second diode which are connected in series in sequence, and the second resistor is connected in parallel with the second inductor, wherein the anode of the second diode is connected with the second inductor, and the cathode of the second diode is connected with the slave power supply.
Optionally, the slave-end processing sub-circuit of the POC circuit further comprises a second magnetic bead connected in series between the second inductor and the second coaxial cable connector.
To achieve the above and other related objects, the present invention further provides a POC circuit, including: a primary processing sub-circuit of any of the above POC circuits, a secondary processing sub-circuit of any of the above POC circuits, and a coaxial cable; one end of the coaxial cable is connected with the main-end processing sub-circuit of the POC circuit, and the other end of the coaxial cable is connected with the auxiliary-end processing sub-circuit of the POC circuit.
Optionally, one end of the coaxial cable is connected to the first coaxial cable connector, and the other end of the coaxial cable is connected to the second coaxial cable connector.
As described above, the utility model discloses a sub-circuit is handled to main terminal of POC circuit, POC circuit's from end processing sub-circuit and POC circuit has following beneficial effect:
the main end power supply is connected with the first coaxial cable connector after passing through the first diode and the first inductor which are sequentially connected in series, LC resonance generated by the first inductor and a bypass capacitor of the main end power supply can be suppressed and eliminated through the first diode which is connected in series, transmission of signals at the main end is facilitated, direct current from the second coaxial cable connector is connected with the slave end power supply after passing through the second inductor and the second diode which are sequentially connected in series, LC resonance generated by the second inductor and the bypass capacitor of the slave end power supply can be suppressed and eliminated through the second diode which is connected in series, and transmission of signals at the slave end is facilitated; from the main end to the slave end, the direct-current power supply only passes through the first diode and the second diode additionally, so that the voltage drop is small and the power consumption is low; the influence of LC resonance is eliminated through a simple circuit structure and a small number of components, complex calculation and debugging are not needed, the circuit design difficulty is low, and the cost is low.
Drawings
Fig. 1 is a schematic circuit diagram of a POC circuit according to an embodiment of the present invention.
Fig. 2 is a schematic circuit diagram of a main-side processing sub-circuit of a POC circuit according to an embodiment of the present invention.
Fig. 3 is a schematic circuit diagram of a slave-end processing sub-circuit of a POC circuit according to an embodiment of the present invention.
Fig. 4 is a schematic circuit diagram of a main-side processing sub-circuit of a POC circuit in the second embodiment of the present invention.
Fig. 5 is a schematic circuit diagram of a slave-end processing sub-circuit of a POC circuit according to a second embodiment of the present invention.
Description of the reference numerals
C1-a first capacitor, C2-a second capacitor, D1-a first diode, D2-a second diode, L1-a first inductor, L2-a second inductor, R1-a first resistor, R2-a second resistor, FB 1-a first magnetic bead, FB 2-a second magnetic bead, BNC 1-a first coaxial cable connector, BNC 2-a second coaxial cable connector, GND-ground, VCC _ S-a main terminal power supply, and VCC _ R-a slave terminal power supply.
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
Please refer to fig. 1 to 5. It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, simple equivalent replacement, and element number change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function and the achievable purpose of the present invention.
Example one
As shown in fig. 1, an embodiment of the present invention provides a POC circuit, which includes: a primary-side processing sub-circuit of the POC circuit, a secondary-side processing sub-circuit of the POC circuit, and a coaxial cable; one end of the coaxial cable is connected with the main-end processing sub-circuit of the POC circuit, and the other end of the coaxial cable is connected with the auxiliary-end processing sub-circuit of the POC circuit.
The main-end processing sub-circuit of the POC circuit is used for processing a main-end signal of the POC circuit and transmitting and processing direct current provided by a main-end power supply, the slave-end processing sub-circuit of the POC circuit is used for processing a slave-end signal of the POC circuit and receiving and processing the direct current through the slave-end power supply, and the coaxial cable simultaneously transmits the direct current, the main-end signal and the slave-end signal.
In detail, as shown in fig. 1 and 2, the main-side processing sub-circuit of the POC circuit includes: a first capacitor C1, a first diode D1, a first inductor L1, a first resistor R1, and a first coaxial cable connector BNC 1; one end of the first capacitor C1 is connected to the main terminal signal, and the other end of the first capacitor C1 is connected to the first coaxial cable connector BNC 1; the main terminal power source VCC _ S is connected to the first coaxial cable connector BNC1 through the first diode D1 and the first inductor L1 connected in series in sequence, the first resistor R1 is connected in parallel with the first inductor L1, wherein the anode of the first diode D1 is connected to the main terminal power source VCC _ S, and the cathode of the first diode D1 is connected to the first inductor L1.
In more detail, the main-side processing sub-circuit of the POC circuit works according to the following principle: direct current provided by a main terminal power supply VCC _ S passes through a first diode D1 and a first inductor L1 and then is input to a coaxial cable through a first coaxial cable connector BNC1, and a main terminal signal passes through a first capacitor C1 and then is input to the coaxial cable through a first coaxial cable connector BNC1, so that simultaneous transmission of the direct current and the main terminal signal is realized on one coaxial cable.
The first inductor L1 presents a low impedance to dc and a high impedance to ac, and is therefore used for connecting dc to facilitate transmission of dc; the first capacitor C1 presents high impedance to direct current and low impedance to alternating current, so that the capacitor C1 is used for connecting a main end signal and is beneficial to transmission of the main end signal; the master signal is bi-directional and can be received and transmitted.
In more detail, in order to filter the power plane, the power plane of the main power VCC _ S has a large capacitance bypass capacitor, which generates LC resonance with the first inductor L1, and the first diode D1 connected in series can suppress and eliminate the LC resonance generated by the first inductor L1 and the bypass capacitor of the main power VCC _ S; meanwhile, the first resistor R1 works in cooperation with the first inductor L1, so that the energy discharge of the first inductor L1 is facilitated, and the first resistor R1 is kiloohm-level resistance.
In detail, as shown in fig. 1 and 3, the slave-end processing sub-circuit of the POC circuit includes: a second capacitor C2, a second diode D2, a second inductor L2, a second resistor R2, and a second coaxial cable connector BNC 2; one end of the second capacitor C2 is terminated with the slave signal, and the other end of the second capacitor C2 is terminated with the second coaxial cable connector BNC 2; the dc power from the second coaxial cable connector BNC2 passes through the second inductor L2 and the second diode D2 connected in series in sequence and then is connected to the slave terminal power VCC _ R, and the second resistor R2 is connected in parallel to the second inductor L2, wherein the anode of the second diode D2 is connected to the second inductor L2, and the cathode of the second diode D2 is connected to the slave terminal power VCC _ R.
In more detail, the working principle of the slave-end processing sub-circuit of the POC circuit is as follows: the direct current transmitted on the coaxial cable passes through the second coaxial cable connector BNC2, the second inductor L2 and the second diode D2 and then is connected to the slave power supply VCC _ R, the slave power supply VCC _ R receives the direct current, and the slave signal passes through the second capacitor C2 and then is input to the coaxial cable through the second coaxial cable connector BNC2, so that the simultaneous transmission of the direct current and the slave signal is realized on one coaxial cable.
The second inductor L2 presents a low impedance to dc and a high impedance to ac, and is therefore used for connecting dc to facilitate transmission of dc; the second capacitor C2 presents a high impedance to direct current and a low impedance to alternating current, and is therefore used for connecting a slave signal, which is beneficial to the transmission of the slave signal; the slave signal is also bi-directional and can receive and transmit.
In more detail, in order to filter the power plane, the power plane of the slave power supply VCC _ R has a bypass capacitor with a large capacitance value, the bypass capacitor generates LC resonance with the second inductor L2, and the second diode D2 connected in series can suppress and eliminate the LC resonance generated by the second inductor L2 and the bypass capacitor of the slave power supply VCC _ R; meanwhile, the second resistor R2 works in cooperation with the second inductor L2, so that the energy discharge of the second inductor L2 is facilitated, and the second resistor R2 is kiloohm-level resistance.
In detail, one end of the coaxial cable is connected to the first coaxial cable connector BNC1, and the other end of the coaxial cable is connected to the second coaxial cable connector BNC 2.
Optionally, the POC circuit may be used in a situation where a primary side is a DVR (digital video recorder) and a secondary side is a camera, the DVR is connected to the camera by a coaxial cable, the DVR supplies power to the camera through the coaxial cable, and the camera transmits a video signal to the DVR through the coaxial cable; the POC circuit can also be used in the scene camera occasion of 1 dragging N, the main end is a main camera, the auxiliary ends are N auxiliary cameras, the auxiliary cameras only comprise lenses, sensors and signal interface chips and do not comprise CPU processors, the main camera supplies power to the auxiliary cameras through a coaxial cable and transmits control signals and the like, and the auxiliary cameras transmit video signals to the main camera through the coaxial cable.
Example two
When the POC circuit in the first embodiment is applied to the security field, the frequency spectrum range of the transmitted video signal is wide, and may reach tens of megabits or hundreds of megabits at most, so as to further reduce the mutual influence between the high-frequency video signal and the direct current, the POC circuit in the first embodiment is improved, and a magnetic bead is connected in series to a current path of the direct current. The magnetic beads are equivalent to series connection of resistors and inductors, are low in direct current resistance and high in high-frequency resistance, and are mainly used for absorbing ultrahigh-frequency signals.
In detail, as shown in fig. 4, in the present embodiment, the main-end processing sub-circuit of the POC circuit further includes a first magnetic bead FB1, and the first magnetic bead FB1 is connected in series between the first inductor L1 and the first coaxial cable connector BNC 1. As shown in fig. 4, other structures of the main-side processing sub-circuit of the POC circuit in this embodiment are the same as those in the first embodiment, and are not described herein again.
In detail, as shown in fig. 5, in the present embodiment, the slave-end processing sub-circuit of the POC circuit further includes a second magnetic bead FB2, and the second magnetic bead FB2 is connected in series between the second inductor L2 and the second coaxial cable connector BNC 2. As shown in fig. 5, other structures of the slave-end processing sub-circuit of the POC circuit in this embodiment are the same as those in the first embodiment, and are not described herein again.
It can be understood that the POC circuit in this embodiment includes: a primary-side processing sub-circuit of the POC circuit shown in fig. 4, a secondary-side processing sub-circuit of the POC circuit shown in fig. 5, and a coaxial cable; one end of the coaxial cable is connected with the main-end processing sub-circuit of the POC circuit through a first coaxial cable connector BNC1, and the other end of the coaxial cable is connected with the slave-end processing sub-circuit of the POC circuit through a second coaxial cable connector BNC 2.
In summary, the utility model discloses a in the main terminal processing sub-circuit of POC circuit, the slave terminal processing sub-circuit and the POC circuit of POC circuit, the main terminal power connects first coaxial-cable connector behind first diode and the first inductance that concatenates in proper order, the first diode that can pass through to concatenate just can restrain the LC resonance that first inductance and the bypass capacitance of main terminal power produced and eliminate, do benefit to the transmission of main terminal signal, the direct current from second coaxial-cable connector inserts the slave terminal power behind second inductance and the second diode that concatenates in proper order, the second diode that can pass through to concatenate just can restrain the LC resonance that second inductance and the bypass capacitance of slave terminal power produced and eliminate, do benefit to the transmission of slave terminal signal; from the main end to the slave end, the direct-current power supply only passes through the first diode and the second diode additionally, so that the voltage drop is small and the power consumption is low; the influence of LC resonance is eliminated through a simple circuit structure and a small number of components, complex calculation and debugging are not needed, the circuit design difficulty is low, and the cost is low.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (6)
1. A primary-side processing sub-circuit of a POC circuit for processing a primary-side signal of the POC circuit and transmitting a direct current provided by a primary-side power supply, comprising: the first capacitor, the first diode, the first inductor, the first resistor and the first coaxial cable connector; one end of the first capacitor is connected with the main end signal, and the other end of the first capacitor is connected with the first coaxial cable connector; the main end power supply is connected with the first coaxial cable connector after passing through the first diode and the first inductor which are sequentially connected in series, the first resistor is connected with the first inductor in parallel, wherein the anode of the first diode is connected with the main end power supply, and the cathode of the first diode is connected with the first inductor.
2. The primary-side processing sub-circuit of the POC circuit of claim 1, wherein the primary-side processing sub-circuit of the POC circuit further comprises a first magnetic bead coupled in series between the first inductor and the first coaxial cable connector.
3. A slave-side processing sub-circuit of a POC circuit for processing a slave-side signal of the POC circuit and for receiving and processing a direct current from a slave-side power supply, comprising: the second capacitor, the second diode, the second inductor, the second resistor and the second coaxial cable connector; one end of the second capacitor is connected with the slave end signal, and the other end of the second capacitor is connected with the second coaxial cable connector; the direct current from the second coaxial cable connector is connected to the slave power supply after passing through the second inductor and the second diode which are connected in series in sequence, and the second resistor is connected in parallel with the second inductor, wherein the anode of the second diode is connected with the second inductor, and the cathode of the second diode is connected with the slave power supply.
4. The slave-end processing sub-circuit of the POC circuit of claim 3, further comprising a second magnetic bead coupled in series between the second inductor and the second coaxial cable connector.
5. A POC circuit, comprising: a primary-side processing sub-circuit of a POC circuit of any of claims 1-2, a secondary-side processing sub-circuit of a POC circuit of any of claims 3-4, and a coaxial cable; one end of the coaxial cable is connected with the main-end processing sub-circuit of the POC circuit, and the other end of the coaxial cable is connected with the auxiliary-end processing sub-circuit of the POC circuit.
6. The POC circuit of claim 5, wherein one end of the coaxial cable is coupled to the first coaxial cable connector and the other end of the coaxial cable is coupled to the second coaxial cable connector.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021159500.7U CN212012650U (en) | 2020-06-19 | 2020-06-19 | Main-end processing sub-circuit, slave-end processing sub-circuit and POC circuit of POC circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021159500.7U CN212012650U (en) | 2020-06-19 | 2020-06-19 | Main-end processing sub-circuit, slave-end processing sub-circuit and POC circuit of POC circuit |
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| CN212012650U true CN212012650U (en) | 2020-11-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113176492A (en) * | 2021-03-10 | 2021-07-27 | 深圳市豪恩汽车电子装备股份有限公司 | Method for measuring scattering parameters of POC circuit |
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2020
- 2020-06-19 CN CN202021159500.7U patent/CN212012650U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113176492A (en) * | 2021-03-10 | 2021-07-27 | 深圳市豪恩汽车电子装备股份有限公司 | Method for measuring scattering parameters of POC circuit |
| CN113176492B (en) * | 2021-03-10 | 2023-12-12 | 深圳市豪恩汽车电子装备股份有限公司 | POC circuit scattering parameter measurement method |
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