CN213305545U - High-definition digital signal cross switching processing circuit - Google Patents
High-definition digital signal cross switching processing circuit Download PDFInfo
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- CN213305545U CN213305545U CN202022588203.0U CN202022588203U CN213305545U CN 213305545 U CN213305545 U CN 213305545U CN 202022588203 U CN202022588203 U CN 202022588203U CN 213305545 U CN213305545 U CN 213305545U
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Abstract
The utility model discloses a high definition digital signal cross switch processing circuit, belong to the electronic circuit field, signal transmission operational reliability and convenience problem have been solved, its technical scheme main points are including signal microprocessor, two HDMI interfaces, two control circuit, and two-way switching circuit, can utilize the one-way conduction mode of diode, realize the break-make direction control of a circuit on two HDMI interfaces, utilize the capacitor to keep apart the direct current, make the signal transmission direction controllable, improve the convenience of using, the two-way transmission of the signal of being convenient for like this is controllable.
Description
Technical Field
The utility model relates to an electronic circuit field relates to a high definition digital signal cross switch processing circuit especially.
Background
The HDMI converter is a device capable of converting HDMI signals into signals such as VGA, AV, component video, SDI and the like, the converted signals have different output image quality, and the device is widely applied to occasions requiring signal conversion such as large-screen projection display engineering, audio-visual teaching, command control centers, multimedia conference rooms and the like, and brings a more flexible solution for users.
At present, all products supporting the HDMI high-definition interface can only realize that the same HDMI port transmits 1 HDMI high-definition signal, either input or output, but input and output cannot be effectively and reliably switched.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to prior art's weak point, solve the technical problem in the correlation technique to a certain extent at least, provide a high definition digital signal cross switch processing circuit to reach the HDMI signal through the HDMI port, can realize switching controllable purpose with HDMI signal input and output.
In order to solve the technical problem, the technical scheme of the utility model is that: a high-definition digital signal cross switching processing circuit comprises a signal microprocessor, two HDMI interfaces, two control circuits and a bidirectional switching circuit;
the bidirectional switching circuit comprises a diode D1, a diode D2, a capacitor C2, a diode D4, a diode D3 and a capacitor C1 which are connected in sequence in a circle surrounded by anticlockwise current; the connection point between the cathode of the diode D3 and the capacitor C1 is connected with the first HDMI interface, and the connection point between the cathode of the diode D2 and the capacitor C2 is connected with the second HDMI interface;
the connection point between the anode of the diode D1 and the capacitor C1 is connected with a control circuit, the connection point between the anode of the diode D4 and the capacitor C2 is connected with a second control circuit, the two control circuits are respectively connected with different pins of the signal microprocessor, and the two control circuits are respectively output by the signal microprocessor to form a high-level signal or a low-level signal.
As a specific aspect of the present invention, it may be preferable that: the two HDMI interfaces also provide a pin connected to the signal microprocessor for providing data signals.
As a specific aspect of the present invention, it may be preferable that: the control circuit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a triode Q1 and a triode Q2; the resistor R1 and the resistor R2 are connected with the signal microprocessor together, the other end of the resistor R1, the emitter of the triode Q1 and one end of the resistor R6 are grounded, the other end of the resistor R2 is connected with the base of the triode Q1, the collector of the triode Q1, the resistor R3 and the resistor R4 are connected together, the other end of the resistor R4 and the emitter of the triode Q2 are connected with the voltage Vcc, the other end of the resistor R3 is connected with the base of the triode Q2, the collector of the triode Q2, the resistor R5 and the other end of the resistor R6 are connected together, and the other end of the resistor R5 serves as a control.
As a specific aspect of the present invention, it may be preferable that: the voltage Vcc end is connected with a voltage regulating circuit, and the voltage regulating circuit comprises an indicator lamp, a resistor R11, a resistor R12, a potentiometer Rp, a chip U1, a diode D11, a diode D12, a capacitor C11 and a capacitor C12; the resistor R11, the third pin of the chip U1 and the cathode of the diode D11 are connected in common to serve as a power supply input end, the other end of the resistor R11 is grounded through an indicator lamp, the first pin of the chip U1, one end of the potentiometer Rp, the anode of the diode D12, one end of the resistor R12 and one end of the capacitor C11 are connected in common, the anode of the diode D11, the second pin of the chip U1, the cathode of the diode D12, the other end of the resistor R12 and one end of the capacitor C12 are connected in common to serve as an output end, and the other end of the capacitor C11 and the other end of the capacitor C12 are connected in common to ground.
The utility model discloses technical effect mainly embodies in following aspect: the unidirectional conduction mode of the diode can be utilized, the on-off direction control of a circuit on two HDMI interfaces is realized, and the direct current is isolated by using the capacitor, so that the signal transmission direction is controllable, the use convenience is improved, and the bidirectional transmission of signals is controllable.
Drawings
FIG. 1 is a schematic diagram of a circuit configuration in an embodiment;
FIG. 2 is a schematic circuit diagram of a control circuit in an embodiment;
fig. 3 is a schematic diagram of a voltage regulating circuit in an embodiment.
Reference numerals: 1. a signal microprocessor; 2. an HDMI interface; 3. a control circuit; 4. a bidirectional switching circuit; 5. a voltage regulating circuit.
Detailed Description
The embodiments of the present invention will be described in detail below, examples of which are illustrated in the accompanying drawings, and the embodiments described below by referring to the drawings are exemplary and intended to explain the present invention so that the technical solutions of the present invention can be more easily understood and grasped, and cannot be construed as limiting the present invention.
Example (b):
referring to fig. 1, the high-definition digital signal cross-switch processing circuit includes a signal microprocessor 1, two HDMI interfaces 2, two control circuits 3, and a bidirectional switch circuit 4. The signal microprocessor 1 is a single chip microcomputer, and can adopt a common 51 single chip microcomputer.
Specifically, the bidirectional switching circuit 4 comprises a diode D1, a diode D2, a capacitor C2, a diode D4, a diode D3 and a capacitor C1 which are sequentially connected in a circle surrounded by a counterclockwise current direction; the connection point between the cathode of the diode D3 and the capacitor C1 is connected to the first HDMI interface 2, and the connection point between the cathode of the diode D2 and the capacitor C2 is connected to the second HDMI interface 2;
the connection point between the anode of the diode D1 and the capacitor C1 is connected to a control circuit 3, the connection point between the anode of the diode D4 and the capacitor C2 is connected to a second control circuit 3, the two control circuits 3 are respectively connected to different pins of the signal microprocessor 1, and the two control circuits 3 are respectively output by the signal microprocessor 1 to generate a high level signal or a low level signal.
The working process of the structure is as follows: the signal microprocessor 1 controls one control circuit 3 to output a high level and the second control circuit 3 to output a low level, and at this time, the signal is transmitted from the upper HDMI interface 2 to the lower HDMI interface 2. The signal microprocessor 1 controls the upper control circuit 3 to output a low level, and the lower control circuit 3 to output a high level, so that the transmission direction of the signal at this time is: is transmitted from the lower HDMI interface 2 to the upper HDMI interface 2. Thereby achieving switching of the signal transmission direction.
The two HDMI interfaces 2 also provide a pin connected to the signal microprocessor 1 for providing a data signal. Therefore, data can be monitored and processed, and the working reliability is improved.
Referring to fig. 2, the control circuit 3 includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a transistor Q1, and a transistor Q2; the resistor R1 and the resistor R2 are connected with the signal microprocessor 1 together, the other end of the resistor R1, the emitter of the triode Q1 and one end of the resistor R6 are grounded, the other end of the resistor R2 is connected with the base of the triode Q1, the collector of the triode Q1, the resistor R3 and the resistor R4 are connected together, the other end of the resistor R4 and the emitter of the triode Q2 are connected with the voltage Vcc, the other end of the resistor R3 is connected with the base of the triode Q2, the collector of the triode Q2, the resistor R5 and the other end of the resistor R6 are connected together, and the other end of the resistor R5 serves as a control.
It can be seen that when the signal S1 is high, the transistor Q1 is turned on, the transistor Q2 is also turned on, so that the signal S2 is also high, otherwise, when the signal S1 is low, the transistor Q2 and the transistor Q1 are both turned off, so that the signal S2 is low. This structure enables the device to reliably output and control high and low levels.
In order to improve the reliable voltage-stabilized power supply Vcc, referring to fig. 3, the voltage Vcc terminal is connected to a voltage-regulating circuit 5, and the voltage-regulating circuit 5 includes an indicator light, a resistor R11, a resistor R12, a potentiometer Rp, a chip U1, a diode D11, a diode D12, a capacitor C11, and a capacitor C12; the resistor R11, the third pin of the chip U1 and the cathode of the diode D11 are connected in common to serve as a power supply input end, the other end of the resistor R11 is grounded through an indicator lamp, the first pin of the chip U1, one end of the potentiometer Rp, the anode of the diode D12, one end of the resistor R12 and one end of the capacitor C11 are connected in common, the anode of the diode D11, the second pin of the chip U1, the cathode of the diode D12, the other end of the resistor R12 and one end of the capacitor C12 are connected in common to serve as an output end, and the other end of the capacitor C11 and the other end of the capacitor C12 are connected in common to ground. The chip is model LM 317.
Output voltage: 1.25-37V DC; output current: 5 mA-1.5A; an overheating, overcurrent and short-circuit protection circuit is arranged in the chip U1; maximum input-output voltage difference: 40V DC, minimum input-output voltage difference: 3V DC; the temperature of the use environment: -10- +85 ℃.
By adjusting the potentiometer Rp, stable adjustment of the output voltage can be achieved. C11 is filter capacitance, C12 is used for bypassing ripple voltage of reference voltage and improving ripple suppression performance of the power supply, D11 and D12 are protection diodes, and R11 and the LED1 are used for work indication and indicate work states through indicator lamps.
Of course, the above is only a typical example of the present invention, and besides, the present invention can also have other various specific embodiments, and all technical solutions adopting equivalent replacement or equivalent transformation are all within the scope of the present invention as claimed.
Claims (4)
1. A high-definition digital signal cross switching processing circuit is characterized by comprising a signal microprocessor, two HDMI interfaces, two control circuits and a bidirectional switching circuit;
the bidirectional switching circuit comprises a diode D1, a diode D2, a capacitor C2, a diode D4, a diode D3 and a capacitor C1 which are connected in sequence in a circle surrounded by anticlockwise current; the connection point between the cathode of the diode D3 and the capacitor C1 is connected with the first HDMI interface, and the connection point between the cathode of the diode D2 and the capacitor C2 is connected with the second HDMI interface;
the connection point between the anode of the diode D1 and the capacitor C1 is connected with a control circuit, the connection point between the anode of the diode D4 and the capacitor C2 is connected with a second control circuit, the two control circuits are respectively connected with different pins of the signal microprocessor, and the two control circuits are respectively output by the signal microprocessor to form a high-level signal or a low-level signal.
2. The high definition digital signal cross-switch processing circuit of claim 1, wherein: the two HDMI interfaces also provide a pin connected to the signal microprocessor for providing data signals.
3. The high definition digital signal cross-switch processing circuit of claim 1, wherein: the control circuit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a triode Q1 and a triode Q2; the resistor R1 and the resistor R2 are connected with the signal microprocessor together, the other end of the resistor R1, the emitter of the triode Q1 and one end of the resistor R6 are grounded, the other end of the resistor R2 is connected with the base of the triode Q1, the collector of the triode Q1, the resistor R3 and the resistor R4 are connected together, the other end of the resistor R4 and the emitter of the triode Q2 are connected with the voltage Vcc, the other end of the resistor R3 is connected with the base of the triode Q2, the collector of the triode Q2, the resistor R5 and the other end of the resistor R6 are connected together, and the other end of the resistor R5 serves as a control.
4. The high definition digital signal cross-switch processing circuit of claim 3, wherein: the voltage Vcc end is connected with a voltage regulating circuit, and the voltage regulating circuit comprises an indicator lamp, a resistor R11, a resistor R12, a potentiometer Rp, a chip U1, a diode D11, a diode D12, a capacitor C11 and a capacitor C12; the resistor R11, the third pin of the chip U1 and the cathode of the diode D11 are connected in common to serve as a power supply input end, the other end of the resistor R11 is grounded through an indicator lamp, the first pin of the chip U1, one end of the potentiometer Rp, the anode of the diode D12, one end of the resistor R12 and one end of the capacitor C11 are connected in common, the anode of the diode D11, the second pin of the chip U1, the cathode of the diode D12, the other end of the resistor R12 and one end of the capacitor C12 are connected in common to serve as an output end, and the other end of the capacitor C11 and the other end of the capacitor C12 are connected in common to ground.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022588203.0U CN213305545U (en) | 2020-11-09 | 2020-11-09 | High-definition digital signal cross switching processing circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022588203.0U CN213305545U (en) | 2020-11-09 | 2020-11-09 | High-definition digital signal cross switching processing circuit |
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| CN213305545U true CN213305545U (en) | 2021-05-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113359574A (en) * | 2021-06-30 | 2021-09-07 | 无锡有容微电子有限公司 | HPD signal control circuit and HDMI switcher based on same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113359574A (en) * | 2021-06-30 | 2021-09-07 | 无锡有容微电子有限公司 | HPD signal control circuit and HDMI switcher based on same |
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