CN211239855U - Optical module connecting circuit - Google Patents
Optical module connecting circuit Download PDFInfo
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- CN211239855U CN211239855U CN202020188755.XU CN202020188755U CN211239855U CN 211239855 U CN211239855 U CN 211239855U CN 202020188755 U CN202020188755 U CN 202020188755U CN 211239855 U CN211239855 U CN 211239855U
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Abstract
The utility model is suitable for a communication field provides an optical module connecting circuit, including the main chip of optical module and the optical signal receiving chip who is connected with the main chip of optical module; the main chip of the optical module is provided with a gigabit media independent interface RGMII; the transmitting terminal TX interfaces of the optical signal receiving chip are respectively connected with the receiving terminal RX interfaces of the gigabit medium independent interfaces of the main chip of the optical module in a one-to-one correspondence manner; and the receiving end RX interfaces of the optical signal receiving chip are respectively connected with the transmitting end TX interfaces of the gigabit medium independent interfaces of the main chip of the optical module in a one-to-one correspondence manner. The utility model discloses the optical signal receiving chip is direct to be connected with the main chip of optical module for the signal of telecommunication that the optical signal conversion was come can directly realize intercommunication with the main chip of optical module.
Description
Technical Field
The utility model belongs to the communication field especially relates to an optical module connecting circuit.
Background
In the prior art, an optical signal received by an optical signal receiving chip is converted into an electrical signal, and then the optical signal receiving chip cannot be directly communicated with a main chip of an optical module.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an optical module connecting circuit aims at solving the optical signal that light signal receiving chip received and can not directly realize the problem of intercommunication with the main chip of optical module after converting the signal of telecommunication into.
The utility model provides an optical module connecting circuit, include:
the optical module comprises a main chip of the optical module and an optical signal receiving chip connected with the main chip of the optical module; the main chip of the optical module is provided with a gigabit media independent interface RGMII;
the transmitting terminal TX interfaces of the optical signal receiving chip are respectively connected with the receiving terminal RX interfaces of the gigabit medium independent interfaces of the main chip of the optical module in a one-to-one correspondence manner; and the receiving end RX interfaces of the optical signal receiving chip are respectively connected with the transmitting end TX interfaces of the gigabit medium independent interfaces of the main chip of the optical module in a one-to-one correspondence manner.
Furthermore, the transmitting terminal TX interfaces of the optical signal receiving chip are respectively connected with the receiving terminal RX interfaces of the gigabit media independent interface of the main chip of the optical module in a one-to-one correspondence manner by serially connecting a resistor; and the receiving end RX interfaces of the optical signal receiving chip are respectively connected with the transmitting end TX interfaces of the gigabit medium independent interfaces of the main chip of the optical module in a one-to-one correspondence manner through serially connecting a resistor.
Furthermore, the transmitting end clock signal interface and the receiving end clock signal interface of the optical signal receiving chip are respectively grounded through a capacitor.
Furthermore, the reset pin of the optical signal receiving chip is grounded through a resistor.
The utility model discloses in, the main chip of the optical module of optical module connecting circuit has gigabit media independent interface RGMII, directly connects with the optical signal receiving chip, directly receives the data link layer signal, makes the electrical signal that the optical signal conversion comes can directly realize intercommunication with the main chip of optical module; the transmitting end clock signal interface and the receiving end clock signal interface of the optical signal receiving chip are grounded through a capacitor respectively, the reset pin of the optical signal receiving chip is grounded through a resistor, other chips are not connected any more, the circuit is simplified, and the cost is saved.
Drawings
Fig. 1 is a partial circuit diagram of an optical signal receiving chip according to an embodiment of the present invention.
Fig. 2 is a partial circuit diagram of a main chip of an optical module according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantageous effects of the present invention more clearly understood, the present invention is further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In order to explain the technical solution of the present invention, the following description is made by using specific examples.
The first embodiment is as follows:
the embodiment of the utility model provides an optical module connecting circuit is provided, include:
the optical module comprises a main chip of the optical module and an optical signal receiving chip connected with the main chip of the optical module; the main chip of the optical module is provided with a gigabit media independent interface (Reduced GMII, RGMII);
the transmitting terminal TX interfaces of the optical signal receiving chip are respectively connected with the receiving terminal RX interfaces of the gigabit medium independent interfaces of the main chip of the optical module in a one-to-one correspondence manner; and the receiving end RX interfaces of the optical signal receiving chip are respectively connected with the transmitting end TX interfaces of the gigabit medium independent interfaces of the main chip of the optical module in a one-to-one correspondence manner.
The transmitting end TX interfaces P _ TXD [0], P _ TXD [1], P _ TXD [2], P _ TXD [3], P _ TXCL and P _ TXCLK of the optical signal receiving chip are respectively connected with receiving end RX interfaces RGMII0_ RXD0, RGMII0_ RXD1, RGMII0_ RXD2, RGMII0_ RXD3, RGMII0_ RXCL and RGMII0_ RXC in the gigabit medium independent interface of the main chip of the optical module in a one-to-one correspondence mode; the receiving terminal RX interfaces P _ RXD [0], P _ RXD [1], P _ RXD [2], P _ RXD [3], P _ RXCTL and P _ RXCLK of the optical signal receiving chip are respectively connected with the transmitting terminal TX interfaces RGMII0_ TXD0, RGMII0_ TXD1, RGMII0_ TXD2, RGMII0_ TXD3, RGMII0_ TXCCTL and RGMII0_ TXC in the gigabit medium independent interface of the main chip of the optical module in a one-to-one correspondence mode.
In the first embodiment of the present invention, the transmitting end clock signal interface P _ TXCLK and the receiving end clock signal interface P _ RXCLK of the optical signal receiving chip are grounded through a capacitor C1 and a capacitor C2, respectively.
In the first embodiment of the present invention, the signal lines of the transmitting end clock signal interface P _ TXCLK and the receiving end clock signal interface P _ RXCLK of the optical signal receiving chip are signal lines processed by a packet.
The embodiment of the utility model provides an in the first, the optical signal receiving chip with the signal line length of the transmitting terminal TX interface of the main chip of optical module and receiving terminal RX interface equals, and the signal line length is less than 2500 mils.
In the first embodiment of the present invention, the reset pin P _ RST of the optical signal receiving chip is grounded through the resistor R13, and the resistance of R13 is 4.7K Ω.
Example two:
the embodiment of the utility model provides an optical module connecting circuit compares utility model embodiment one difference and lies in:
the transmitting end TX interfaces of the optical signal receiving chip are respectively connected with the receiving end RX interfaces of the gigabit medium independent interfaces of the main chip of the optical module in a one-to-one correspondence manner through serially connecting a resistor; and the receiving end RX interfaces of the optical signal receiving chip are respectively connected with the transmitting end TX interfaces of the gigabit medium independent interfaces of the main chip of the optical module in a one-to-one correspondence manner through serially connecting a resistor.
Referring to fig. 1 and 2, the transmitting terminal TX interfaces P _ TXD [0], P _ TXD [1], P _ TXD [2], P _ TXD [3], P _ TXCTL and P _ TXCLK of the optical signal receiving chip are respectively connected with the receiving terminal RX interfaces RGMII0_ RXD0, RGMII0_ RXD1, RGMII0_ RXD2, RGMII0_ RXD3, RGMII0_ RXCTL and RGMII0_ RXC in the gigabit media independent interface of the main chip of the P optical module in a one-to-one correspondence manner through a series resistor R1, R2, R3, R4, R5 and R6; the receiving end RX interfaces P _ RXD [0], P _ RXD [1], P _ RXD [2], P _ RXD [3], P _ RXCTL and P _ RXCLK of the optical signal receiving chip are respectively connected with the transmitting end TX interfaces RGMII0_ TXD0, RGMII0_ TXD1, RGMII0_ TXD2, RGMII0_ TXD3, RGMII0_ TXCCTL and RGMII0_ TXC in the gigabit medium independent interface of the main chip of the optical module in a one-to-one correspondence mode through resistors R7, R8, R9, R10, R11 and R12 in series, and the resistance value of R1-R12 is 22 omega.
The embodiment of the utility model provides a in the second, when the PCB overall arrangement resistance is close to transmitting terminal TX interface side.
The embodiment of the present invention provides a second embodiment, the receiving terminal RX interface of the optical signal receiving chip and the link between the transmitting terminal TX interfaces of the main chip of the optical module have a 50 ohm resistance value, the 50 ohm resistance value is generated by the resistance connected in series between the receiving terminal RX interface of the optical signal receiving chip and the transmitting terminal TX interfaces of the main chip of the optical module.
The embodiment of the utility model provides an in, the main chip of optical module connecting circuit's optical module has gigabit medium independent interface RGMII, and the optical signal receiving chip is direct to be connected with the main chip of optical module for the signal of telecommunication that the optical signal conversion was come can be direct realizes intercommunication with the main chip of optical module.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. A light module connection circuit, comprising:
the optical module comprises a main chip of the optical module and an optical signal receiving chip connected with the main chip of the optical module; the main chip of the optical module is provided with a gigabit media independent interface RGMII;
the transmitting terminal TX interfaces of the optical signal receiving chip are respectively connected with the receiving terminal RX interfaces of the gigabit medium independent interfaces of the main chip of the optical module in a one-to-one correspondence manner; and the receiving end RX interfaces of the optical signal receiving chip are respectively connected with the transmitting end TX interfaces of the gigabit medium independent interfaces of the main chip of the optical module in a one-to-one correspondence manner.
2. The optical module connection circuit according to claim 1, wherein the TX interfaces at the transmitting ends of the optical signal receiving chips are respectively connected with RX interfaces at the receiving ends of the gigabit media independent interface of the main chip of the optical module in a one-to-one correspondence by serially connecting a resistor; and the receiving end RX interfaces of the optical signal receiving chip are respectively connected with the transmitting end TX interfaces of the gigabit medium independent interfaces of the main chip of the optical module in a one-to-one correspondence manner through serially connecting a resistor.
3. The circuit of claim 2, wherein the resistor is proximate to a transmit port TX interface side in a PCB layout.
4. The circuit of claim 1, wherein the transmitting end clock signal interface and the receiving end clock signal interface of the optical signal receiving chip are grounded through a capacitor respectively.
5. The circuit of claim 1, wherein signal lines of the transmitting-side clock signal interface and the receiving-side clock signal interface of the optical signal receiving chip are packet-processed signal lines.
6. The circuit of claim 1, wherein the lengths of signal lines of the transmitting terminal TX interface and the receiving terminal RX interface of the optical signal receiving chip and the main chip of the optical module are equal.
7. The circuit of claim 2, wherein a link between the receiving terminal RX interface of the optical signal receiving chip and the transmitting terminal TX interface of the main chip of the optical module has a resistance of 50 ohms, and the resistance of 50 ohms is generated by a resistor connected in series between the receiving terminal RX interface of the optical signal receiving chip and the transmitting terminal TX interface of the main chip of the optical module.
8. The circuit of claim 1, wherein the reset pin of the optical signal receiving chip is grounded through a resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020188755.XU CN211239855U (en) | 2020-02-20 | 2020-02-20 | Optical module connecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020188755.XU CN211239855U (en) | 2020-02-20 | 2020-02-20 | Optical module connecting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211239855U true CN211239855U (en) | 2020-08-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020188755.XU Active CN211239855U (en) | 2020-02-20 | 2020-02-20 | Optical module connecting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211239855U (en) |
-
2020
- 2020-02-20 CN CN202020188755.XU patent/CN211239855U/en active Active
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