CN217010829U - Crystal oscillator driving circuit and uninterrupted power supply - Google Patents
Crystal oscillator driving circuit and uninterrupted power supply Download PDFInfo
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- CN217010829U CN217010829U CN202123086569.9U CN202123086569U CN217010829U CN 217010829 U CN217010829 U CN 217010829U CN 202123086569 U CN202123086569 U CN 202123086569U CN 217010829 U CN217010829 U CN 217010829U
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Abstract
The utility model discloses a crystal oscillator driving circuit and an uninterruptible power supply, wherein the crystal oscillator driving circuit is connected with a plurality of control chips and comprises a first power supply; the crystal oscillator is connected with the first power supply and is used for generating a clock oscillation square wave signal; and the signal conversion unit is respectively connected with the first power supply, the crystal oscillator and the plurality of control chips, and is used for converting the clock oscillation square wave signals into a plurality of remotely transmitted square wave signals and outputting the square wave signals to the control chips which are correspondingly connected one by one. Compared with the prior art, the utility model realizes the long-distance transmission of the crystal oscillator clock signal, can avoid the mutual interference of the access signal of the control chip and the crystal oscillator clock signal, and improves the signal stability of the control chip.
Description
Technical Field
The utility model relates to the technical field of chips, in particular to a crystal oscillator driving circuit and an uninterruptible power supply.
Background
As shown in fig. 1, in a Universal Power Supply (UPS), multi-chip control is generally used, and when multi-chip control such as DSP, MCU, CPLD and the like is used, each control chip needs to be driven by a clock crystal oscillator, because the transmission distance of the crystal oscillator is short and the carrying capacity is poor, there is no way to drive multiple control chips by one crystal oscillator at the same time, the current common method is that each control chip uses its own crystal oscillator (the crystal oscillator is close to the control chip), the drawback is that the required number of crystal oscillators is large, because the crystal oscillator generates a high-frequency triangular wave, the transmission distance is far distorted, resulting in incomplete signals, and for complete signals, the crystal oscillators need to be placed close to the control chips, especially active crystal oscillators, the Power-on time of each crystal oscillator is not consistent, and the crystal oscillators themselves have certain deviation, resulting in inconsistent time base among the control chips, information interaction among the UPS multiple chips can be influenced, and even normal operation of the machine can be influenced; and the crystal oscillator needs to be close to the control chip, and the control chip has more signals which interfere with the clock signal of the crystal oscillator to influence the signal stability of the control chip.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide a crystal oscillator driving circuit and an uninterruptible power supply, and aims to realize long-distance transmission of a crystal oscillator clock signal, avoid mutual interference of a control chip access signal and the crystal oscillator clock signal and improve the signal stability of the control chip.
In order to achieve the above object, the present invention provides a crystal oscillator driving circuit, which is connected to a plurality of control chips, the crystal oscillator driving circuit comprising:
a first power supply;
the crystal oscillator is connected with the first power supply and is used for generating a clock oscillation square wave signal; and the number of the first and second groups,
the signal conversion unit is respectively connected with the first power supply, the crystal oscillator and the control chips, and is used for converting the clock oscillation square wave signals into a plurality of remotely transmitted square wave signals and outputting the square wave signals to the control chips which are correspondingly connected one by one.
A further technical solution of the present invention is that the signal conversion unit includes a plurality of signal conversion subunits, a first input terminal of each of the signal conversion subunits is commonly connected to the crystal oscillator, an output terminal of each of the signal conversion subunits is respectively connected to one of the control chips, and one of the signal conversion subunits is configured to output one of the square wave signals to one of the control chips that is correspondingly connected thereto.
The utility model further adopts the technical scheme that each signal conversion subunit comprises a first resistor, a second resistor and a comparator, wherein the positive pole of the first power supply is respectively connected with one end of the crystal oscillator, the first resistor of each signal conversion subunit and the positive pole of the power supply of the comparator of each signal conversion subunit, the negative electrode of the first power supply is respectively connected with one end of the second resistor of each signal conversion subunit and the negative electrode of the power supply of the comparator of each signal conversion subunit, the negative electrode of the first power supply is grounded, the other end of the first resistor of each signal conversion subunit is connected with the other end of the corresponding second resistor, and the other end of the crystal oscillator is respectively connected with the in-phase input end of the comparator of each signal conversion subunit, and the output end of the comparator of each signal conversion subunit is respectively connected with the corresponding control chip.
The utility model further adopts the technical scheme that the signal conversion subunit comprises a Schmitt trigger, the anode of the first power supply is respectively connected with one end of the crystal oscillator and one end of the Schmitt trigger, the cathode of the first power supply is respectively connected with the other end of the Schmitt trigger, the other end of the Schmitt trigger is grounded, the other end of the crystal oscillator is connected with the input end of the Schmitt trigger, and the output end of the Schmitt trigger is connected with the corresponding control chip.
According to a further technical scheme of the present invention, the signal conversion unit includes a plurality of third resistors, a plurality of fourth resistors, and a multi-channel comparator, wherein an anode of the first power supply is connected to one end of the crystal oscillator, one end of each of the third resistors, and an anode of the multi-channel comparator, a cathode of the first power supply is connected to one end of each of the fourth resistors and a cathode of the multi-channel comparator, a cathode of the first power supply is grounded, another end of one of the third resistors is correspondingly connected to another end of one of the fourth resistors, and is connected to an inverting input terminal of the multi-channel comparator, another end of the crystal oscillator is connected to a non-inverting input terminal of the multi-channel comparator, and a plurality of output terminals of the multi-channel comparator are connected to corresponding control chips.
The further technical scheme of the utility model is that the number of the control chips is four, and the multi-channel comparator is a 4-channel comparator.
According to a further technical scheme of the utility model, the signal conversion unit comprises a multi-channel Schmitt trigger, the anode of the first power supply is respectively connected with one end of the crystal oscillator and the anode end of the multi-channel Schmitt trigger, the cathode of the first power supply is respectively connected with the cathode end of the multi-channel Schmitt trigger, the other end of the crystal oscillator is respectively connected with a plurality of input ends of the Schmitt trigger, and a plurality of output ends of the Schmitt trigger are respectively connected with corresponding control chips.
The further technical scheme of the utility model is that the number of the control chips is 6, and the Schmitt trigger is a 6-channel Schmitt trigger.
In order to achieve the above object, the present invention further provides an uninterruptible power supply, including:
the uninterrupted power supply main circuit comprises a plurality of control chips and is used for providing an uninterrupted power supply; and the crystal oscillator driving circuit is connected with the plurality of control chips and is used for driving the plurality of control chips.
The further technical scheme of the utility model is that each control chip is connected with a corresponding DC power supply, and the first power supply is any one of the DC power supplies or an additional independent one.
The crystal oscillator driving circuit and the uninterrupted power supply have the advantages that: according to the technical scheme, the crystal oscillator driving circuit is connected with a plurality of control chips, and comprises: a first power supply; the crystal oscillator is connected with the first power supply and is used for generating a clock oscillation square wave signal; and the signal conversion unit is respectively connected with the first power supply, the crystal oscillator and the control chips, and is used for converting the clock oscillation square wave signals into a plurality of square wave signals capable of being transmitted remotely and outputting the square wave signals to the control chips correspondingly one by one, so that the crystal oscillator clock signal is transmitted remotely, mutual interference of control chip access signals and the crystal oscillator clock signals is avoided, and the signal stability of the control chips is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic diagram of a multi-chip multi-crystal oscillator according to the prior art;
FIG. 2 is a schematic circuit diagram of a first embodiment of a crystal driving circuit according to the present invention;
fig. 3 is a schematic circuit diagram of a second embodiment of the crystal driving circuit according to the utility model.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
In the conventional UPS, the required crystal oscillators are large in number and need to be placed close to the control chips, particularly active crystal oscillators, the power-on time of each crystal oscillator is inconsistent, and in addition, each crystal oscillator has certain deviation, so that the time bases among the control chips are inconsistent, the information interaction among multiple chips of the UPS is influenced, and even the normal operation of the machine is influenced. And the crystal oscillator needs to be close to the control chip, and the control chip has more signals which interfere with the clock signal of the crystal oscillator to influence the signal stability of the control chip.
Specifically, the utility model provides a crystal oscillator driving circuit to realize long-distance transmission of a crystal oscillator clock signal, avoid mutual interference between a control chip access signal and the crystal oscillator clock signal, and improve the signal stability of the control chip.
More specifically, the crystal oscillator driving circuit is connected to the plurality of control chips, and the crystal oscillator driving circuit includes a first power supply (DC power supply X), a crystal oscillator and a signal conversion unit, where the crystal oscillator is an active crystal oscillator.
The crystal oscillator is connected with the first power supply (DC power supply X) and is used for generating a clock oscillation square wave signal; the signal conversion unit is respectively connected with the first power supply (DC power supply X), the crystal oscillator and the control chips, and is used for converting the clock oscillation square wave signals into a plurality of remotely transmitted square wave signals and outputting the square wave signals to the control chips which are correspondingly connected one by one.
The signal conversion unit comprises a plurality of signal conversion subunits, the first input end of each signal conversion subunit is commonly connected with the crystal oscillator, the output end of each signal conversion subunit is respectively connected with one control chip, and one signal conversion subunit is used for outputting one square wave signal to the corresponding control chip.
As shown in fig. 2, as a first embodiment of the present invention, each of the signal converting subunits includes a resistor R1, a resistor R2 and a comparator, wherein, the anode of the DC power supply X is respectively connected with one end of the crystal oscillator, the resistor R1 of each signal conversion subunit and the power supply anode of the comparator of each signal conversion subunit, the negative pole of the DC power supply X is respectively connected with one end of the resistor R2 of each signal conversion subunit and the power supply negative pole of the comparator of each signal conversion subunit, the negative pole of the DC power supply X is grounded, the other end of the resistor R1 of each signal conversion subunit is connected with the other end of the corresponding resistor R2, and the other end of the crystal oscillator is respectively connected with the in-phase input end of the comparator of each signal conversion subunit, and the output end of the comparator of each signal conversion subunit is respectively connected with the corresponding control chip.
As shown in fig. 3, as a second embodiment of the present invention, in this embodiment, the signal conversion subunit includes a schmitt trigger, a positive electrode of the DC power supply X is connected to one end of the crystal oscillator and one end of the schmitt trigger, a negative electrode of the DC power supply X is connected to the other end of the schmitt trigger, the other end of the schmitt trigger is grounded, the other end of the crystal oscillator is connected to an input end of the schmitt trigger, and an output end of the schmitt trigger is connected to a corresponding control chip.
In this embodiment, the DC power supply X may be any one of the DC power supplies 1 to N, or may be an additional independent one. The output high-low level change is adjusted by adjusting the voltage division of the resistor R1 and the resistor R2, the comparator is used for converting a clock oscillation square wave signal of the crystal oscillator into a square wave signal which can be transmitted remotely, the load carrying capacity of the crystal oscillator is increased, and therefore the problem of poor load carrying capacity of the crystal oscillator is solved, the crystal oscillator can be transmitted relatively remotely, then the square wave signal is sent to each control chip to serve as a time base signal, a plurality of control chips can share the same crystal oscillator clock signal, the clock signal can be almost completely synchronized by the same multi-channel comparator, and the problem of inconsistent time base among the control chips is solved. The crystal oscillator can be far away from each control chip, and the mutual interference between the crystal oscillator and other signals of the control chips is prevented.
As another embodiment, in this embodiment, the signal conversion unit includes a plurality of third resistors, a plurality of fourth resistors, and a multi-channel comparator, the anode of the first power supply (DC power supply X) is respectively connected with one end of the crystal oscillator, one end of each third resistor and the power supply anode of the multi-channel comparator, the negative electrode of the first power supply (DC power supply X) is respectively connected with one end of each fourth resistor and the power supply negative electrode of the multi-channel comparator, the negative electrode of the first power supply (DC power supply X) is grounded, the other end of the third resistor is correspondingly connected with the other end of the fourth resistor, and the other end of the crystal oscillator is respectively connected with a non-inverting input end of the multi-channel comparator, and a plurality of output ends of the multi-channel comparator are respectively connected with the corresponding control chips.
As an embodiment, when there are 4 control chips, a 4-channel comparator may be used to simultaneously supply the clock signal of one crystal oscillator to the 4 control chips. Optionally, the 4-channel comparator in this embodiment may adopt a 4-channel comparator with a model LM2901D, and in other embodiments, other models of multi-channel comparators may also be adopted, which is not limited herein.
The signal conversion unit comprises a multi-channel Schmitt trigger, the anode of the first power supply (DC power supply X) is respectively connected with one end of the crystal oscillator and the anode end of the multi-channel Schmitt trigger, the cathode of the first power supply (DC power supply X) is respectively connected with the cathode end of the multi-channel Schmitt trigger, the other end of the crystal oscillator is respectively connected with a plurality of input ends of the Schmitt trigger, and a plurality of output ends of the Schmitt trigger are respectively connected with corresponding control chips.
As an embodiment, when the number of the control chips is 6, the clock signal of one crystal oscillator can be simultaneously sent to the 6 control chips by using a 6-channel schmitt trigger. Optionally, the 6-channel schmitt trigger in this embodiment may be a SN74HC 146-channel schmitt trigger, and in other embodiments, other types of multi-channel schmitt triggers may also be used, which is not limited herein.
The crystal oscillator driving circuit has the beneficial effects that: according to the technical scheme, the crystal oscillator driving circuit is connected with a plurality of control chips, and comprises: a first power supply (DC power supply X); the crystal oscillator is connected with the first power supply (DC power supply X) and is used for generating a clock oscillation square wave signal; and the signal conversion unit is respectively connected with the first power supply (DC power supply X), the crystal oscillator and a plurality of control chips, and is used for converting the clock oscillation square wave signals into a plurality of square wave signals capable of being remotely transmitted and outputting the square wave signals to the control chips correspondingly connected one by one, so that the remote transmission of the clock signals of the crystal oscillator is realized, the mutual interference of the access signals of the control chips and the clock signals of the crystal oscillator is avoided, and the signal stability of the control chips is improved.
In order to achieve the above object, the present invention further provides an uninterruptible power supply, which includes an uninterruptible power supply main circuit with a plurality of control chips for providing an uninterruptible power supply, and the crystal oscillator driving circuit according to the above embodiment, where the crystal oscillator driving circuit is connected to the plurality of control chips for driving the plurality of control chips.
Each control chip is connected with a corresponding DC power supply, and a first power supply (DC power supply X) of the crystal oscillator driving circuit is any one of the DC power supplies or an additional independent one.
The structure and the operation principle of the crystal oscillator driving circuit have been described in detail above, and are not described herein again.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A crystal oscillator driving circuit, which is connected to a plurality of control chips, the crystal oscillator driving circuit comprising:
a first power supply;
the crystal oscillator is connected with the first power supply and is used for generating a clock oscillation square wave signal; and the number of the first and second groups,
the signal conversion unit is respectively connected with the first power supply, the crystal oscillator and the control chips, and is used for converting the clock oscillation square wave signals into a plurality of remotely transmitted square wave signals and outputting the square wave signals to the control chips which are correspondingly connected one by one.
2. The crystal oscillator driving circuit according to claim 1, wherein the signal conversion unit comprises a plurality of signal conversion sub-units, a first input terminal of each signal conversion sub-unit is commonly connected to the crystal oscillator, an output terminal of each signal conversion sub-unit is respectively connected to one of the control chips, and one of the signal conversion sub-units is configured to output one of the square wave signals to one of the control chips correspondingly connected thereto.
3. The crystal oscillator driving circuit according to claim 2, wherein each of the signal converting subunits comprises a first resistor, a second resistor and a comparator, wherein an anode of the first power supply is connected to one end of the crystal oscillator, the first resistor of each of the signal converting subunits and a power supply anode of the comparator of each of the signal converting subunits, respectively, a cathode of the first power supply is connected to one end of the second resistor of each of the signal converting subunits and a power supply cathode of the comparator of each of the signal converting subunits, respectively, a cathode of the first power supply is grounded, the other end of the first resistor of each of the signal converting subunits is connected to the other end of the corresponding second resistor and to an inverting input terminal of the corresponding comparator, and the other end of the crystal oscillator is connected to an non-inverting input terminal of the comparator of each of the signal converting subunits, respectively, and the output end of the comparator of each signal conversion subunit is respectively connected with the corresponding control chip.
4. The crystal oscillator driving circuit according to claim 2, wherein the signal conversion subunit includes a schmitt trigger, the positive electrode of the first power supply is connected to one end of the crystal oscillator and one end of the schmitt trigger, the negative electrode of the first power supply is connected to the other end of the schmitt trigger, the other end of the schmitt trigger is grounded, the other end of the crystal oscillator is connected to the input end of the schmitt trigger, and the output end of the schmitt trigger is connected to the corresponding control chip.
5. The crystal oscillator driving circuit according to claim 1, wherein the signal conversion unit comprises a plurality of third resistors, a plurality of fourth resistors, and a multi-channel comparator, the anode of the first power supply is respectively connected with one end of the crystal oscillator, one end of each third resistor and the power supply anode of the multi-channel comparator, the negative electrode of the first power supply is respectively connected with one end of each fourth resistor and the negative electrode of the power supply of the multi-channel comparator, the negative electrode of the first power supply is grounded, the other end of the third resistor is correspondingly connected with the other end of the fourth resistor, and the other end of the crystal oscillator is respectively connected with a non-inverting input end of the multi-channel comparator, and a plurality of output ends of the multi-channel comparator are respectively connected with the corresponding control chips.
6. The crystal oscillator driving circuit according to claim 5, wherein the number of the control chips is four, and the multi-channel comparator is a 4-channel comparator.
7. The crystal oscillator driving circuit according to claim 1, wherein the signal conversion unit comprises a multi-channel schmitt trigger, a positive electrode of the first power supply is connected to one end of the crystal oscillator and a positive electrode of the multi-channel schmitt trigger, a negative electrode of the first power supply is connected to a negative electrode of the multi-channel schmitt trigger, another end of the crystal oscillator is connected to a plurality of input ends of the schmitt trigger, and a plurality of output ends of the schmitt trigger are connected to corresponding control chips.
8. The crystal oscillator driving circuit according to claim 7, wherein the number of the control chips is 6, and the schmitt trigger is a 6-channel schmitt trigger.
9. An uninterruptible power supply, comprising:
the main circuit of the uninterrupted power supply of the plurality of control chips is used for providing the uninterrupted power supply; and
the crystal oscillator driving circuit according to any one of claims 1 to 8, wherein the crystal oscillator driving circuit is connected to the plurality of control chips for driving the plurality of control chips.
10. The uninterruptible power supply of claim 9, wherein each control chip is connected to a corresponding DC power source, and the first power source is any one of the DC power sources or an additional independent one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123086569.9U CN217010829U (en) | 2021-12-08 | 2021-12-08 | Crystal oscillator driving circuit and uninterrupted power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123086569.9U CN217010829U (en) | 2021-12-08 | 2021-12-08 | Crystal oscillator driving circuit and uninterrupted power supply |
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| Publication Number | Publication Date |
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| CN217010829U true CN217010829U (en) | 2022-07-19 |
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| CN202123086569.9U Active CN217010829U (en) | 2021-12-08 | 2021-12-08 | Crystal oscillator driving circuit and uninterrupted power supply |
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Effective date of registration: 20230725 Address after: 518000 rooms 401 and 402, 4th floor, building 1, software park, kejizhong 2nd Road, Gaoxin North District, Nanshan District, Shenzhen City, Guangdong Province (office only) Patentee after: SHENZHEN KSTAR SCIENCE AND TECHNOLOGY Co.,Ltd. Address before: 516000 1st floor, No.1 Workshop, No.2 West hechangqi Road, Zhongkai high tech Zone, Huizhou City, Guangdong Province Patentee before: Guangdong Youdian New Energy Technology Co.,Ltd. |