CN218767854U - Synchronous drive circuit and driver system - Google Patents
Synchronous drive circuit and driver system Download PDFInfo
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- CN218767854U CN218767854U CN202222850618.XU CN202222850618U CN218767854U CN 218767854 U CN218767854 U CN 218767854U CN 202222850618 U CN202222850618 U CN 202222850618U CN 218767854 U CN218767854 U CN 218767854U
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Abstract
The utility model discloses a synchronous drive circuit and driver system, synchronous drive circuit includes control signal source, difference changes single-ended circuit, signal switching circuit, single-ended to differential circuit and driver, and wherein the control signal source is used for sending drive signal, the control signal source includes first signal source and second signal source; the differential-to-single-ended circuit is connected with the control signal source and used for receiving the driving signal and converting the driving signal from a differential signal to a single-ended signal; the signal switching circuit is connected with the differential-to-single-ended circuit; the single-end to differential circuit is connected with the signal switching circuit; the driver is connected with the single-ended to differential circuit; the synchronous driving circuit can ensure synchronous operation of a plurality of drivers, and improves the stability of the synchronous operation of the system to a certain extent.
Description
Technical Field
The utility model relates to a driver control field especially relates to a synchronous drive circuit and driver system.
Background
At present, in an existing driver group, a central control hub usually controls each driver through a plurality of control signals, but a connection cable from the central control hub to the drivers is easily subjected to electromagnetic interference, and it is difficult to ensure the synchronization among the drivers in the control process, and under the condition that the driver group needs to be synchronously driven, the phenomenon of asynchronization may occur.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a synchronous drive circuit and driver system, can guarantee a plurality of drivers synchronous operation, improve system synchronous operation's stability to a certain extent.
In a first aspect, an embodiment of the present invention provides a synchronous driving circuit for controlling a driver, including: the control signal source is used for sending a driving signal, the control signal source comprises a first signal source and a second signal source, the driving signal comprises a first driving signal and a second driving signal, the first signal source is used for sending the first driving signal to synchronously control the driver, and the second signal source is used for sending the second driving signal to independently debug the driver; the differential-to-single-ended circuit is connected with the control signal source and used for receiving the driving signal and converting the driving signal from a differential signal to a single-ended signal; the signal switching circuit is connected with the differential-to-single-ended circuit and used for switching the first driving signal and the second driving signal; the single-ended to differential circuit is connected with the signal switching circuit and is used for converting the driving signal from the single-ended signal into the differential signal; the driver is connected with the single-ended to differential circuit.
According to the utility model discloses the synchronous drive circuit that the embodiment of first aspect provided has following beneficial effect at least: the second signal source sends the second drive signal in order to carry out the debugging alone to each driver, guarantee that every driver can normally work, all debug all back with all drivers, carry out synchronous control to the driver through the first drive signal of first signal source, carry out the in-process of synchronous operation at the driver system, the drive signal of each driver produces by a source signal, the uniformity of the drive signal who is used for controlling each driver has been guaranteed, and the drive signal is differential signal, the interference killing feature is strong, the fidelity transmission of signal has been guaranteed, therefore, this synchronous drive circuit can guarantee a plurality of drivers synchronous operation, improve the stability of system synchronous operation to a certain extent.
In an embodiment of the present invention, the driving signal includes a distance pulse signal and a direction level signal, the first driving signal includes a first distance pulse signal and a first direction level signal, and the second driving signal includes a second distance pulse signal and a second direction level signal.
In an embodiment of the present invention, the first unit is connected to the first signal source, and is configured to convert the first distance pulse signal from the differential signal to the single-ended signal; the second unit is connected with the second signal source and used for converting the second distance pulse signal from the differential signal into the single-ended signal; the third unit is connected with the first signal source and used for converting the first direction level signal from the differential signal into the single-ended signal; the fourth unit is connected to the second signal source, and configured to convert the second direction level signal from the differential signal to the single-ended signal.
In an embodiment of the present invention, the signal switching circuit includes a fifth unit and a sixth unit, the fifth unit is connected to the first unit and the second unit for switching the first distance pulse signal and the second distance pulse signal, and the sixth unit is connected to the third unit and the fourth unit for switching the first direction level signal and the second direction level signal.
In an embodiment of the present invention, the single-ended to differential circuit includes a seventh unit and an eighth unit, the seventh unit is connected to the fifth unit, and is configured to convert the distance pulse signal from the single-ended signal to the differential signal; the eighth unit is connected to the sixth unit and configured to convert the direction level signal from the single-ended signal to the differential signal.
In an embodiment of the present invention, the driver is provided with a plurality of drivers, each of the drivers is connected to the seventh unit and the eighth unit, and can receive the distance pulse signal from the seventh unit and the direction level signal from the eighth unit.
In an embodiment of the present invention, the signal switching circuit is provided with an electronic analog switch, and the circuit switching can be performed through the electronic analog switch.
In an embodiment of the present invention, the signal switching circuit further includes a ninth unit, the ninth unit is connected to the fifth unit and the sixth unit respectively, and is configured to control the fifth unit and the sixth unit to switch signals according to a switching instruction.
In an embodiment of the present invention, the same distance pulse signal and direction level signal of the control signal source are equal in the wiring length between each part of the synchronous driving circuit.
In a second aspect, an embodiment of the present invention provides a driver system, where the driver system includes a plurality of drivers, and further includes a synchronous driving circuit provided in any embodiment of the first aspect of the present invention.
According to the utility model discloses a second aspect embodiment provides a driver system, has following beneficial effect at least: the driver system comprises a plurality of drivers and a synchronous driving circuit, a second signal source sends a second driving signal to independently debug each driver, each driver is guaranteed to work normally, all drivers are debugged and completed, the drivers are synchronously controlled through a first driving signal of a first signal source, the driver system is synchronously operated, the driving signals of each driver are generated by one source signal, the consistency of the driving signals for controlling each driver is guaranteed, the driving signals are differential signals, the anti-interference capability is strong, the fidelity transmission of the signals is guaranteed, the driver system can guarantee the synchronous operation of the drivers, and the stability of the synchronous operation of the system is improved to a certain extent.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the technical solutions of the present invention, and are incorporated in and constitute a part of this specification, together with the embodiments of the present invention for explaining the technical solutions of the present invention, and do not constitute a limitation on the technical solutions of the present invention.
The invention will be further described with reference to the following figures and examples:
fig. 1 is a schematic circuit diagram of a synchronous driving circuit according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of another synchronous driving circuit according to an embodiment of the present invention.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, a plurality of meanings are one or more, a plurality of meanings are two or more, and the terms greater than, smaller than, exceeding, etc. are understood as excluding the number, and the terms greater than, lower than, within, etc. are understood as including the number. If there is a description of first and second for distinguishing technical features, this is not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the terms such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the terms in the present invention by combining the specific contents of the technical solution.
The embodiment of the utility model provides a synchronous drive circuit and driver system can guarantee a plurality of drivers synchronous operation, improves system synchronous operation's stability to a certain extent.
The embodiments of the present invention will be further explained with reference to the drawings.
Referring to fig. 1, fig. 1 is a schematic circuit diagram of a synchronous driving circuit provided in an embodiment of the present invention, the synchronous driving circuit includes a control signal source, a differential-to-single-ended circuit, a signal switching circuit, a single-to-differential circuit, and a driver, wherein the control signal source is used for sending a driving signal, the control signal source includes a first signal source and a second signal source, the driving signal includes a first driving signal and a second driving signal, the first signal source is used for sending the first driving signal to perform synchronous control on the driver, and the second signal source is used for sending the second driving signal to perform individual debugging on the driver; the differential-to-single-ended circuit is connected with the control signal source and used for receiving the driving signal and converting the driving signal from the differential signal into a single-ended signal, so that signal switching can be performed subsequently; the signal switching circuit is connected with the differential-to-single-ended circuit, is used for switching a first driving signal and a second driving signal, can be switched to the second driving signal firstly, and respectively debugs each driver through the second driving signal so as to enable the drivers to work normally; the single-ended to differential circuit is connected with the signal switching circuit and used for converting the driving signal from a single-ended signal to a differential signal, and the differential signal has strong anti-interference capability and can ensure the fidelity transmission of the signal; the driver is connected with the single-ended to differential circuit, can receive drive signal and carry out work under drive signal's control, first drive signal is produced by a source signal, drive signal carries out synchro control to the driver through the first drive signal of first signal source, the uniformity of the drive signal who is used for controlling each driver has effectively been guaranteed, and drive signal is differential signal, the interference killing feature is strong, the fidelity transmission of signal has been guaranteed, therefore, this synchronous drive circuit can guarantee a plurality of drivers synchronous operation, improve system synchronous operation's stability to a certain extent.
In this embodiment, as shown in fig. 2, the synchronous driving circuit may further include a power supply unit for supplying power to the synchronous driving circuit, and it is understood that it is a conventional technical means of a person skilled in the art to provide the power supply unit for supplying power to the synchronous driving circuit.
It can be understood that, in the probe station, 4 needle bases are generally driven by 4 stepping motors respectively in the vertical direction (Z axis) of the machine station, each needle base drives 2 probing edges, and 8 probing edges are provided in total, and the probing edges and the control modules thereof are the same, and need to be kept synchronous all the time during the automatic operation, because the probing edges need to probe the chips simultaneously and test the chips with the same probe pressure at the same time until all the chips on the wafer are probed. If the motor crowd is asynchronous then can influence the accuracy of surveying, damage probe or wafer even, cause the test unusual, so be used for controlling motor crowd's drive signal's synchronism very important, the utility model provides a synchronous drive circuit can effectively guarantee a plurality of driver synchronous operation, improves system synchronous operation's stability to a certain extent, uses the second drive signal to debug to switch first drive signal and drive, guarantee the synchronous working of motor crowd, guarantee the synchronization and the accurate of surveying. In this embodiment, the step motors can be individually controlled by switching to the second driving signal, and the step motors are manually controlled to enable the probing edges to gradually approach to a certain wafer on the scenic circle until the wafer is accurately in place or is separated from contact with the wafer, after all the step motors are debugged, that is, the probing edges of all the needle bases reach a consistent working state through manual debugging, the first driving signal is used to control all the step motors, so that synchronous operation of a motor group is realized, and synchronization and accuracy of detection are guaranteed.
It will also be appreciated that there are a plurality of drivers, one to N, where N is a positive integer greater than 1.
In an embodiment of the invention, the drive signal comprises a distanceThe first driving signal comprises a first distance pulse signal and a first direction level signal, and the second driving signal comprises a second distance pulse signal and a second direction level signal. Wherein the range pulse signal and the direction level signal are both differential signals, the differential pair of the first range pulse signal may be represented as
PULZ-; a differential pair of first direction level signals may be represented as->
DIRZ-; the differential pair of the second distance pulse signal can be denoted as->
PULn-; the differential pair of the second direction level signal may be denoted as->
DIRn-; wherein n is a positive integer.
It will be appreciated that the second drive signal is a distributed multi-path signal, and that, assuming that the second drive signal comprises a three-path signal, the differential pair of the second range pulse signals may be represented as
PUL1-、/>
PUL2-、/>
PUL3-; the differential pair of the second direction level signal may be denoted as->
DIR1-、/>
DIR2-、/>
DIR3-。
It can be understood that the differential-to-single-ended Circuit, the signal switching Circuit and the single-to-differential Circuit can be arranged on the same Printed Circuit Board (PCBA), which facilitates wiring, and makes the Circuit hardware integral clean and simple, and is convenient for use in practical scenes.
The utility model discloses an in the embodiment, do not specifically prescribe a limit to driver driven object, the drive object can be step motor, also can be any kind of motor or actuating mechanism of synchronizing signal control, promptly the utility model provides a synchronous drive circuit suitability is strong, can be applied to multiple scene in order to carry out synchro control.
In some embodiments, the first signal source may be an industrial personal computer or a control processor serving as a central control hub, and the second signal source may be a test station, and no matter what kind of device the first signal source and the second signal source are, as long as the first signal source and the second signal source can send corresponding driving signals, the first signal source and the second signal source are within the protection range of the embodiment.
Referring to fig. 2, fig. 2 is a schematic circuit diagram of a synchronous driving circuit according to an embodiment of the present invention, an embodiment of the present invention provides a synchronous driving circuit, wherein the differential-to-single-ended circuit includes a first unit, a second unit, a third unit and a fourth unit, the first unit is connected to a first signal source for converting a first distance pulse signal from a differential signal into a single-ended signal; the second unit is connected with a second signal source and used for converting the second distance pulse signal from a differential signal into a single-ended signal; the third unit is connected with the first signal source and used for converting the first direction level signal from a differential signal into a single-ended signal; the fourth unit is connected with the second signal source and used for converting the second direction level signal from the differential signal into a single-ended signal. Wherein the single-ended signal of the first range pulse signal may be denoted as PULZ; a single ended signal of the first direction level signal may be denoted as DIRZ; the single-ended signal of the second range pulse signal may be denoted as PULn; the single-ended signal of the second direction level signal may be denoted as DIRn; wherein n is a positive integer.
It can be understood that the single-ended signal is easy to process, and the conversion of the driving signal from the differential signal to the single-ended signal can facilitate the subsequent signal switching.
As shown in fig. 2, in an exemplary embodiment, the signal switching circuit includes a fifth unit and a sixth unit, the fifth unit being connected to the first unit and the second unit, respectively, capable of receiving the first distance pulse signal from the first unit and the second distance pulse signal from the second unit, and switching the first distance pulse signal and the second distance pulse signal; the sixth unit is connected to the third unit and the fourth unit, respectively, and is capable of receiving the first direction level signal from the third unit and the second direction level signal from the fourth unit and switching the first direction level signal and the second direction level signal.
It will be understood by those skilled in the art that the fifth unit and the sixth unit may be chips for signal switching.
In an exemplary embodiment, as shown in fig. 2, the single-ended to differential circuit includes a seventh unit and an eighth unit, where the seventh unit is connected to the fifth unit and is used to convert the range pulse signal from a single-ended signal to a differential signal; the eighth unit is connected with the sixth unit and used for converting the direction level signal from a single-ended signal to a differential signal.
It can be understood that the driving signal is converted from the single-ended signal to the differential signal, so that the anti-interference capability of the driving signal can be improved, the signal can be transmitted in a fidelity manner, and the synchronism of the driving signal can be ensured.
In this embodiment, the seventh unit is capable of converting the first range pulse signal PULZ from the fifth unit into a plurality of differential pair signals, i.e.
PULZ1-、/>
PULZ2-、.../>
PULZn-; and is capable of converting the second range pulse signal purn from the fifth unit into a corresponding differential pair signal->
PULn-; the eighth cell is able to convert the first direction level signal DIRZ from the six cells into a plurality of differential pair signals, i.e. < >>
DIRZ-、
DIRZ2-、.../>
DIRZn-; and is capable of converting the second direction level signal DIRn from the sixth unit into a corresponding differential pair signal->
DIRn-; wherein n is a positive integer.
In an exemplary embodiment, as shown in fig. 2, the driver is provided in a number, each driver is connected to the seventh unit and the eighth unit, and is capable of receiving the distance pulse signal from the seventh unit and the direction level signal from the eighth unit.
In an exemplary embodiment, the signal switching circuit is provided with an electronic analog switch, and circuit switching can be performed by the electronic analog switch.
In this embodiment, use electronic analog switch to replace traditional contact direct current relay, solved the problem that contact direct current relay adhesion was maintained, electronic analog switch's the number of times that moves to close is unlimited almost, has both saved time and money, moves stable advantage again, can effectively improve product quality, maintains the stability of user's production line to a certain extent.
As shown in fig. 2, in an exemplary embodiment, the signal switching circuit further includes a ninth unit, and the ninth unit is connected to the fifth unit and the sixth unit respectively, and is configured to control the fifth unit and the sixth unit to perform signal switching according to a switching instruction.
In the present embodiment, in fig. 2, the switching instruction received by the ninth unit may be represented by SW Signal; the signal for controlling the signal switching of the fifth unit and the sixth unit can be represented by S/a Ctrl.
It should be noted that the switching instruction may be sent by the test station serving as the second signal source, but the source of the switching instruction is not specifically limited in this embodiment, and the switching instruction may also be sent by an industrial personal computer or a central control hub serving as the first signal source, which is also within the protection scope of this embodiment.
In an exemplary embodiment, the distance pulse signal and the direction level signal of the same control signal source have the same wiring length between the respective portions of the synchronous drive circuit. The synchronous distance pulse signal, that is, the first distance pulse signal, is the differential PCB (Printed Circuit Board) wiring with equal length from the port to the pin of the differential-to-single-ended Circuit, the wiring of each synchronous single-ended signal before and after the single-ended signal passes through the electronic analog switch is the single-ended PCB wiring with equal length, the synchronous single-ended signal is converted into a differential signal pair of each path through the signal switching Circuit, and the differential PCB wiring with equal length is arranged after the signal switching Circuit; all the wiring of the synchronous direction level signal, i.e. the first direction level signal, is the same as the first distance pulse signal, and is also the same PCB wiring with the same length.
It can be understood that the lines are equal in length and the same processing and operation are performed in the board, so that the signals are kept highly consistent in time in the circuit board, and the synchronous arrival and synchronous operation of the driving signals are facilitated.
It should be noted that each connection cable may be a twisted pair with a shield, but the present embodiment does not specifically limit the type of the connection cable, and parallel lines with a shield layer may be used as the connection cable, and the present embodiment is also within the protection scope of the present embodiment.
The embodiment of the utility model provides a still provide a driver system, this driver system includes a plurality of drivers and the utility model provides a synchronous drive circuit, in this driver system, the second signal source sends the second drive signal in order to debug each driver alone, the operating condition who guarantees every driver can be unanimous, all debug all the back of accomplishing all drivers, the first drive signal through first signal source carries out synchro control to the driver, carry out the in-process of synchronous operation at the driver system, the drive signal of each driver produces by a source signal, the uniformity of the drive signal who is used for controlling each driver has been guaranteed, and drive signal is differential signal, the interference killing feature is strong, the fidelity transmission of signal has been guaranteed, a plurality of driver synchronous operation can be guaranteed to this driver system, improve the stability of system synchronous operation to a certain extent.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (10)
1. A synchronous drive circuit for controlling a driver, comprising:
the control signal source is used for sending a driving signal, the control signal source comprises a first signal source and a second signal source, the driving signal comprises a first driving signal and a second driving signal, the first signal source is used for sending the first driving signal to synchronously control the driver, and the second signal source is used for sending the second driving signal to independently debug the driver;
the differential-to-single-ended circuit is connected with the control signal source and used for receiving the driving signal and converting the driving signal from a differential signal to a single-ended signal;
the signal switching circuit is connected with the differential-to-single-ended circuit and used for switching the first driving signal and the second driving signal;
the single-ended to differential circuit is connected with the signal switching circuit and used for converting the driving signal from the single-ended signal to the differential signal; the driver is connected with the single-ended to differential circuit.
2. The synchronous drive circuit according to claim 1, wherein the drive signals comprise a distance pulse signal and a direction level signal, the first drive signal comprises a first distance pulse signal and a first direction level signal, and the second drive signal comprises a second distance pulse signal and a second direction level signal.
3. The synchronous driving circuit according to claim 2, wherein the differential-to-single-ended circuit comprises a first unit, a second unit, a third unit and a fourth unit, the first unit is connected to the first signal source and is configured to convert the first distance pulse signal from the differential signal to the single-ended signal; the second unit is connected with the second signal source and used for converting the second distance pulse signal from the differential signal into the single-ended signal; the third unit is connected with the first signal source and used for converting the first direction level signal from the differential signal into the single-ended signal; the fourth unit is connected to the second signal source, and configured to convert the second direction level signal from the differential signal to the single-ended signal.
4. The synchronous driving circuit according to claim 3, wherein the signal switching circuit includes a fifth unit and a sixth unit, the fifth unit is connected to the first unit and the second unit for switching the first distance pulse signal and the second distance pulse signal, and the sixth unit is connected to the third unit and the fourth unit for switching the first direction level signal and the second direction level signal.
5. The synchronous driving circuit according to claim 4, wherein the single-ended to differential circuit comprises a seventh unit and an eighth unit, the seventh unit is connected to the fifth unit and is configured to convert the range pulse signal from the single-ended signal to the differential signal; the eighth unit is connected to the sixth unit and configured to convert the direction level signal from the single-ended signal to the differential signal.
6. The synchronous drive circuit according to claim 5, wherein the drivers are provided in plurality, each of the drivers is connected to the seventh unit and the eighth unit, and is capable of receiving the distance pulse signal from the seventh unit and the direction level signal from the eighth unit.
7. The synchronous drive circuit according to claim 1, wherein the signal switching circuit is provided with an electronic analog switch by which circuit switching can be performed.
8. The synchronous driving circuit according to claim 4, wherein the signal switching circuit further comprises a ninth unit, and the ninth unit is respectively connected to the fifth unit and the sixth unit, and is configured to control the fifth unit and the sixth unit to perform signal switching according to a switching instruction.
9. The synchronous drive circuit according to claim 2, wherein the distance pulse signal and the direction level signal of the same control signal source have equal wiring lengths between the respective parts of the synchronous drive circuit.
10. A driver system comprising a plurality of drivers, further comprising a synchronous drive circuit as claimed in any one of claims 1 to 9.
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| CN202222850618.XU CN218767854U (en) | 2022-10-27 | 2022-10-27 | Synchronous drive circuit and driver system |
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| CN202222850618.XU CN218767854U (en) | 2022-10-27 | 2022-10-27 | Synchronous drive circuit and driver system |
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