CN215773070U - Alternative control circuit, alternative device, electronic connection system and electronic equipment - Google Patents
Alternative control circuit, alternative device, electronic connection system and electronic equipment Download PDFInfo
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- CN215773070U CN215773070U CN202121975506.6U CN202121975506U CN215773070U CN 215773070 U CN215773070 U CN 215773070U CN 202121975506 U CN202121975506 U CN 202121975506U CN 215773070 U CN215773070 U CN 215773070U
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Abstract
The application relates to the technical field of electronics, and discloses an alternative control circuit, an alternative device, an electronic connection system and electronic equipment, which can reduce the research and development cost of electronic products and shorten the research and development period. The second-to-first control circuit comprises a first switching tube, a second switching tube, a first resistor, a second resistor, a third resistor and a fourth resistor; the first end of the first switch tube and the first end of the second switch tube are connected in common and serve as a signal output end, the second end of the first switch tube and one end of the first resistor are connected in common and serve as a first signal input end, the control end of the first switch tube, one end of the third resistor and one end of the fourth resistor are connected in common, the control end of the second switch tube, the other end of the first resistor and one end of the second resistor are connected in common, the second end of the second switch tube and the other end of the third resistor are connected in common and serve as a second signal input end, and the other end of the second resistor and the other end of the fourth resistor are connected to the ground end.
Description
Technical Field
The present application relates to the field of electronic technologies, and in particular, to an alternative control circuit, an alternative device, an electronic connection system, and an electronic apparatus.
Background
Chip select, which refers to the process of selecting a signal from multiple signals, is often required in electronic products with multiple voltage inputs. The utility model discloses the people discovers, often directly uses the chip selection chip to realize the chip selection process at present, however, the chip selection chip relies on foreign supplier and chip to belong to high-accuracy device, and the chip price is also than higher, chooses the chip selection chip for use and can aggravate the material cost of enterprise to increased product cost, also can receive the chip selection chip supply influence and extension development cycle.
SUMMERY OF THE UTILITY MODEL
The application aims to provide an alternative control circuit, an alternative device, an electronic connection system and electronic equipment, so as to solve the technical problems that the product cost is increased and the development period is prolonged in the traditional scheme.
An alternative control circuit comprises a first switch tube, a second switch tube, a first resistor, a second resistor, a third resistor and a fourth resistor;
the first end of the first switch tube and the first end of the second switch tube are connected in common and used as a signal output end, the second end of the first switch tube and one end of the first resistor are connected in common and used as a first signal input end, the control end of the first switch tube, one end of the third resistor and one end of the fourth resistor are connected in common, the control end of the second switch tube, the other end of the first resistor and one end of the second resistor are connected in common, the second end of the second switch tube and the other end of the third resistor are connected in common and used as a second signal input end, and the other end of the second resistor and the other end of the fourth resistor are connected to the ground end;
the first signal input end is used for being connected to a first input voltage signal, the second signal input end is used for being connected to a second input voltage signal, the first input voltage signal and the second input voltage signal are different in size, and the first switch tube and the second switch tube are the same type of switch tube.
In an embodiment, the first switch tube and the second switch tube are field effect tubes of the same type.
In an embodiment, the first switch tube and the second switch tube are the same type of insulated gate field effect tube.
In an embodiment, the first switch tube and the second switch tube are both P-type insulated gate field effect transistors, a source of the first switch tube is used as a first end of the first switch tube, a drain of the first switch tube is used as a second end of the first switch tube, a gate of the first switch tube is used as a control end of the first switch tube, a source of the second switch tube is used as a first end of the second switch tube, a drain of the second switch tube is used as a second end of the second switch tube, and a gate of the second switch tube is used as a control end of the second switch tube.
In an embodiment, the alternative control circuit further includes a filter capacitor, and one end of the filter capacitor is connected to the first signal input terminal.
An alternative device, comprising a first signal input interface, a second signal input interface, a signal output interface and the alternative control circuit of any of the foregoing, wherein the first signal input terminal is connected to the first signal input interface, the second signal input terminal is connected to the second signal input interface, and the signal output terminal is connected to the signal output interface.
An electronic connection system comprises a first signal source, a second signal source, electronic equipment and the aforementioned alternative device, wherein a first signal input interface of the alternative device is connected to the first signal source, a second signal input interface of the alternative device is connected to the second signal source, and a signal output interface of the alternative device is connected with the electronic equipment.
An electronic device comprising an alternative control circuit as claimed in any preceding claim.
In the above scheme, an alternative control circuit is provided, where the first switch tube and the second switch tube are field effect tubes of the same type, and the same ends (first ends) are connected together, and the other same end (second end) is respectively connected to two voltage signals of different sizes, so that, as can be seen from the circuit relationship, by configuring a resistance parameter of the resistor, one of the switch tubes can be turned on, and the other switch tube can be turned off, so that one of the input voltage signals is successfully output from the signal output end, and the other input voltage signal is turned off to be output, such as implementing high voltage output, thereby implementing an alternative function. Compared with the traditional scheme, the chip selection method has the advantages that an expensive chip selection chip is not needed, research and development cost is greatly reduced, in addition, the chip is not purchased, the fact that the research and development period is prolonged due to the fact that the chip is not supplied is effectively avoided, and the research and development period is favorably shortened.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of an alternative control circuit according to an embodiment of the present application;
fig. 2 is another schematic diagram of an alternative control circuit according to an embodiment of the present application;
fig. 3 is another schematic structural diagram of an alternative control circuit according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In order to explain the technical means of the present application, the following description will be given by way of specific examples.
As shown in fig. 1, the present application provides an alternative control circuit, which includes a first switch Q1, a second switch Q2, a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4;
wherein a first end of the first switch tube Q1 and a first end of the second switch tube Q2 are commonly connected and used as a signal output end (VOUT), a second end of the first switch tube Q1 and one end of a first resistor R1 are commonly connected and the commonly connected end is used as a first signal input end (V _ IN1), a control end of the first switch tube Q1, one end of a third resistor R3 and one end of a fourth resistor R4 are commonly connected, a control end of the second switch tube Q2, the other end of the first resistor R1 and one end of the second resistor R2 are commonly connected, a second end of the second switch tube Q2 and the other end of the third resistor R3 are commonly connected and used as a second signal input end (V _ IN2), the other end of the second resistor R2 and the other end of the fourth resistor R4 are connected to ground;
the first signal input terminal (V _ IN1) is configured to be connected to a first input voltage signal, the second signal input terminal (V _ IN2) is configured to be connected to a second input voltage signal, and the first input voltage signal and the second input voltage signal are different IN magnitude, for example, the first input voltage signal is 12V, the second input voltage signal is 5V, and the first switch tube Q1 and the second switch tube Q2 are the same type of switch tube.
In an embodiment, the first switch Q2 and the second switch Q2 are Field Effect Transistors (FETs) of the same type, and in some embodiments, the first switch Q2 and the second switch Q2 are mosfets (MOS-FETs) of the same type, or the first switch Q2 and the second switch Q2 are JFETs (Junction Field-Effect transistors) of the same type. In other embodiments, the first switch tube Q2 and the second switch tube Q2 may be other power switch tubes, such as a triode, and may be configured according to requirements, which is not limited in this application.
In this embodiment, since the first switch Q1 and the second switch Q2 are field effect transistors of the same type, and the same terminals (first terminals) are connected together, and the other same terminals (second terminals) are respectively connected to two voltage signals with different magnitudes, it can be known from the circuit relationship that by configuring the resistance value parameters, one of the switch transistors is turned on, the other switch transistor is turned off, so that one of the input voltage signals is successfully output from the signal output terminal (VOUT), and the other input voltage signal is turned off, for example, a high voltage output is realized, and an alternative function is realized. Compared with the traditional scheme, the chip selection method has the advantages that an expensive chip selection chip is not needed, research and development cost is greatly reduced, in addition, the chip is not purchased, the fact that the research and development period is prolonged due to the fact that the chip is not supplied is effectively avoided, and the research and development period is favorably shortened.
As shown in fig. 2 or fig. 3, in a specific embodiment, the first switch Q1 and the second switch Q2 are both P-type insulated gate field effect transistors (PMOS), wherein a source (s pole) of the first switch Q1 is a first end of the first switch Q2, a drain (d pole) of the first switch Q1 is a second end of the first switch Q2, a gate (g pole) of the first switch Q1 is a control end of the first switch Q1, a source (s pole) of the second switch Q2 is a first end of the second switch Q2, a drain (d pole) of the second switch Q2 is a second end of the second switch Q2, and a gate (g pole) of the second switch Q2 is a control end of the second switch Q2.
It should be noted that, here, the first switching tube Q1 and the second switching tube Q2 are both P-type insulated gate field effect transistors (PMOS) only as an example, but the present invention is not limited thereto. The first switch transistor Q1 and the second switch transistor Q2 may be other field effect transistors or switch transistors, and are not specifically described herein.
For the sake of understanding, the working principle of the first switch transistor Q1 and the second switch transistor Q2 will be described by taking a P-type insulated gate field effect transistor (PMOS) as an example.
As is well known, the conduction condition of a PMOS tube is the voltage V of the g pole and the s pole of the PMOS tubegsLess than a certain negative voltage (e.g., -2V), the embodiments of the present application may configure the resistance relationships according to the magnitudes of the first input voltage signal and the second input voltage signal, so that the circuit can satisfy the purpose of selecting one of the first input voltage signal and the second input voltage signal when the circuit inputs the first input voltage signal and the second input voltage signal.
For example, as shown IN fig. 3, assuming that the first input voltage signal is 12V (12V _ IN) and the second input voltage signal is 5V (5V _ IN), the conduction condition of the PMOS transistor Q1 and the PMOS transistor Q2 is VgsLess than-2V, so the first resistor R1 is 4.7k, the second resistor R2 is 100k, the third resistor R3 is 4.7k, and the fourth resistor R4 is 100k, when any voltage is input into the first signal input end and the second signal input end, as can be seen from the circuit relationship, the PMOS transistor Q1 and the PMOS transistor Q2 are both in an off state (i.e., an off state), and the signal output end has no output, when 12V is input into the first signal input end and 5V is input into the second signal input end, as can be seen from the circuit relationship, the voltage of the fourth resistor R4, i.e., the g-voltage V of the upper end of the first switch tube Q, is found through the voltage division of the third resistor R3 and the fourth resistor R4, and the voltage of the fourth resistor R4 is seen, i.e., the g-voltage V of the upper end of the first switch tube QQ1 gComprises the following steps:
and 12V passes through the parasitic diode of the PMOS transistor Q1 to the s-pole, so the voltage V of the s-pole of the PMOS transistor Q1Q1 sEqual to 12V minus the voltage drop of its parasitic diode, which is approximately equal to a few tenths of a V, and is not ignored, assuming that V is notQ1 sApproximately equal to 12V.
Therefore, the voltage V of g pole and s pole of the PMOS transistor Q1Q1 gsThe calculation method of (c) is as follows:
similarly, the g pole and s pole of the PMOS transistor Q2 have a voltage VQ2 gsIs calculated by the method and VQ1 gsSimilarly, as follows:
it can be seen that VQ1 gsabout-7.2V, and VQ2 gs-0.53V, so that the PMOS transistor Q1 is turned on and the PMOS transistor Q2 is turned off, so that the first input voltage signal 12V is outputted to the signal output terminal through the PMOS transistor Q1, and the second input voltage signal 5V cannot be outputted due to the turn-off of the PMOS transistor Q2, and the output voltage of the signal output terminal V _ OUT is 12V.
It can be seen from the above embodiments that, through the embodiments of the present application, 12V and 5V can be alternatively selected, so as to realize high voltage 12V output and chip selection of high voltage signals, and the circuit is simple, the cost is low, and an expensive chip selection chip is not required.
It should be noted that fig. 3 is only an exemplary illustration in the embodiment of the present application, and does not limit the embodiment of the present application, and the embodiment of the present application may select a required resistor or a switching tube according to the requirement of a chip select voltage signal, which is not limited in the embodiment of the present application. It should be noted that, taking the first switch transistor Q1H and the second switch transistor Q2 as PMOS transistors as an example, the selection of the PMOS transistor also needs to look at the power requirement of the back end, and the leakage current I of the selected PMOS transistorDSRequiring more current than is required.
In an embodiment, the alternative control circuit further includes a filter capacitor C, and one end of the filter capacitor C is connected to the first signal input end, so that a function of filtering a chip-selected high-voltage signal (e.g. 12V) can be performed, voltage output can be stabilized, and interference can be reduced.
In an embodiment, the present application provides an alternative device, which includes a first signal input interface, a second signal input interface, a signal output interface, and the alternative control circuit according to any one of the preceding embodiments, wherein the first signal input terminal is connected to the first signal input interface, the second signal input terminal is connected to the second signal input interface, and the signal output terminal is connected to the signal output interface. In this embodiment, an alternative device is provided, which can be applied to various alternative application scenarios, and because the alternative device is simple and low in cost, dependence on a chip selection chip can be effectively reduced, an alternative purpose can be achieved, and the alternative device has a better application scenario, and is beneficial to replacing a chip to achieve the purpose of chip selection.
In one embodiment, an electronic connection system is provided, which includes a first signal source (e.g. 12V), a second signal source (e.g. 5V), an electronic device, and the aforementioned alternative device, wherein a first signal input interface of the alternative device is connected to the first signal source, a second signal input interface of the alternative device is connected to the second signal source, and a signal output interface of the alternative device is connected to the electronic device. Therefore, the electronic equipment can ensure that the high-voltage (such as 12V) is preferentially output when two paths of voltages are input simultaneously by the alternative device, and the function of preferentially outputting the high voltage is achieved.
In an embodiment, there is provided an electronic device comprising the alternative control circuit of any of the preceding claims. For example, the electronic device is mainly an electronic product with multiple voltage inputs, so that the electronic device is a certain consumer electronic product, one path of the electronic device is 12V of a TYPE-C interface, and the other path of the electronic device is 5V of a wireless charging interface, so that the two paths of voltages can be simultaneously input, the high-voltage (12V) voltage is preferentially output, and the high-voltage preferential output function is achieved. The alternative control circuit is simple and low in cost, so that dependence on a chip selection chip can be eliminated, the product development cost can be reduced, the problem of prolonging the research and development period caused by the fact that the chip selection chip is not supplied can be solved, and the research and development period can be shortened.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (8)
1. An alternative control circuit is characterized by comprising a first switch tube, a second switch tube, a first resistor, a second resistor, a third resistor and a fourth resistor;
the first end of the first switch tube and the first end of the second switch tube are connected in common and used as a signal output end, the second end of the first switch tube and one end of the first resistor are connected in common and used as a first signal input end, the control end of the first switch tube, one end of the third resistor and one end of the fourth resistor are connected in common, the control end of the second switch tube, the other end of the first resistor and one end of the second resistor are connected in common, the second end of the second switch tube and the other end of the third resistor are connected in common and used as a second signal input end, and the other end of the second resistor and the other end of the fourth resistor are connected to the ground end;
the first signal input end is used for being connected to a first input voltage signal, the second signal input end is used for being connected to a second input voltage signal, the first input voltage signal and the second input voltage signal are different in size, and the first switch tube and the second switch tube are the same type of switch tube.
2. The alternative control circuit of claim 1 wherein the first switch transistor and the second switch transistor are the same type of fet.
3. The alternative control circuit of claim 2 wherein the first switch transistor and the second switch transistor are the same type of insulated gate field effect transistor.
4. The whichever control circuit of claim 3, wherein the first switching tube and the second switching tube are P-type insulated gate field effect transistors, a source of the first switching tube is used as the first end of the first switching tube, a drain of the first switching tube is used as the second end of the first switching tube, a gate of the first switching tube is used as the control end of the first switching tube, a source of the second switching tube is used as the first end of the second switching tube, a drain of the second switching tube is used as the second end of the second switching tube, and a gate of the second switching tube is used as the control end of the second switching tube.
5. An alternative control circuit according to any of claims 1 to 4 further comprising a filter capacitor, one end of the filter capacitor being connected to the first signal input.
6. An alternative apparatus comprising a first signal input interface, a second signal input interface, a signal output interface and an alternative control circuit according to any of claims 1-5, wherein the first signal input is connected to the first signal input interface, the second signal input is connected to the second signal input interface, and the signal output is connected to the signal output interface.
7. An electronic connection system comprising a first signal source, a second signal source, an electronic device, and the alternative device of claim 6, wherein a first signal input interface of the alternative device is connected to the first signal source, a second signal input interface of the alternative device is connected to the second signal source, and a signal output interface of the alternative device is connected to the electronic device.
8. An electronic device comprising the alternative control circuit of any of claims 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121975506.6U CN215773070U (en) | 2021-08-20 | 2021-08-20 | Alternative control circuit, alternative device, electronic connection system and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121975506.6U CN215773070U (en) | 2021-08-20 | 2021-08-20 | Alternative control circuit, alternative device, electronic connection system and electronic equipment |
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| CN215773070U true CN215773070U (en) | 2022-02-08 |
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| CN202121975506.6U Active CN215773070U (en) | 2021-08-20 | 2021-08-20 | Alternative control circuit, alternative device, electronic connection system and electronic equipment |
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