CN210168012U - Multifunctional crystal oscillator temperature frequency drift automatic correction compensator - Google Patents
Multifunctional crystal oscillator temperature frequency drift automatic correction compensator Download PDFInfo
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- CN210168012U CN210168012U CN201921386104.5U CN201921386104U CN210168012U CN 210168012 U CN210168012 U CN 210168012U CN 201921386104 U CN201921386104 U CN 201921386104U CN 210168012 U CN210168012 U CN 210168012U
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Abstract
The utility model discloses a multi-functional crystal oscillator temperature is automatic correction compensator that wafts frequently, relate to the electronic circuit field, this multi-functional crystal oscillator temperature is automatic correction compensator that wafts frequently has increased corresponding peripheral control circuit for temperature compensation crystal oscillator, through the tristate buffer that links to each other with temperature compensation crystal oscillator, reverser and single-pole double-throw switch, combine each control terminal can realize producing different states, cooperation temperature variation compensation crystal oscillator, thereby can flare out the original temperature curve of temperature compensation crystal oscillator, reach high accuracy frequency, satisfy the industrial use needs.
Description
Technical Field
The utility model belongs to the technical field of the electronic circuit and specifically relates to a multi-functional crystal oscillator temperature is automatic correction compensator that wafts frequently.
Background
A TCXO (Temperature compensated crystal Oscillator) is a crystal Oscillator in which a variation amount of an oscillation frequency generated by a change in ambient Temperature is reduced by an additional Temperature compensation circuit, but compensation accuracy that the TCXO can achieve is difficult to meet industrial needs.
SUMMERY OF THE UTILITY MODEL
The inventor of the present invention provides a multi-functional crystal oscillator temperature is automatic correction compensator that wafts frequently to above-mentioned problem and technical demand, the technical scheme of the utility model as follows:
a multifunctional crystal oscillator temperature frequency drift automatic correction compensator comprises a temperature compensation crystal oscillator, wherein a VDD pin of the temperature compensation crystal oscillator is connected with the anode of a power supply, and the VDD pin is grounded through a filter capacitor; the control signal source is connected with the input end of the tri-state buffer, the output end of the tri-state buffer is connected with an SCLK pin of the temperature compensation crystal oscillator, and the serial clock high-resistance state control end is connected with the enabling end of the tri-state buffer through the first reverser; the digital signal input end is connected with one movable end of the first single-pole double-throw switch through the second reverser, the other movable end of the first single-pole double-throw switch is connected with the signal output end, the fixed end of the first single-pole double-throw switch is connected with one movable end of the second single-pole double-throw switch, the other movable end of the second single-pole double-throw switch is connected with the fixed end of the third single-pole double-throw switch, and the fixed end of the second single-pole double-throw switch is connected with a CSOUT pin of the temperature compensation crystal oscillator; one movable end of the third single-pole double-throw switch is suspended, and the other movable end of the third single-pole double-throw switch is connected with the first digital multimeter; the clipping sine wave output control signal closing control end is connected with the control end of the first single-pole double-throw switch and the control end of the third single-pole double-throw switch through a third reverser; the clipping sine wave output control signal starting control end is connected with the control end of the second single-pole double-throw switch through a fourth reverser; the signal input high-resistance state control end is connected with the control end of a fourth single-pole double-throw switch through a fifth reverser, one movable end of the fourth single-pole double-throw switch is suspended, the other movable end of the fourth single-pole double-throw switch is connected with the output end of a three-state buffer, and the fixed end of the fourth single-pole double-throw switch is connected with a second digital multimeter; the CSOUT pin of the temperature compensation crystal oscillator is grounded through a first capacitor and a first resistor respectively, and is connected with a frequency counter after being sequentially connected with a second capacitor and an amplifier.
The multifunctional crystal oscillator temperature frequency drift automatic correction compensator comprises at least two temperature compensation crystal oscillators, and the positive pole of a power supply is respectively connected with the VDD pin of each temperature compensation crystal oscillator through a multi-way switch; the output end of the tri-state buffer is respectively connected with the SCLK pin of each temperature compensation crystal oscillator through a multi-way switch; and the fixed end of the second single-pole double-throw switch is respectively connected with the CSOUT pin of each temperature compensation crystal oscillator through a multi-way switch.
The multifunctional crystal oscillator temperature frequency drift automatic correction compensator comprises 1024 temperature compensation crystal oscillators, the anode of a power supply is connected with the common end of a first multi-way switch, each channel of the first multi-way switch is respectively connected with the common end of a second multi-way switch, and each channel of each second multi-way switch is respectively connected with a VDD pin of the temperature compensation crystal oscillator; the output end of the tri-state buffer is connected with the common end of the third multi-way switch, each channel of the third multi-way switch is respectively connected with the common end of a fourth multi-way switch, and each channel of each fourth multi-way switch is respectively connected with an SCLK pin of the temperature compensation crystal oscillator; the fixed end of the second single-pole double-throw switch is connected with the common end of a fifth multi-way switch, each channel of the fifth multi-way switch is respectively connected with the common end of a sixth multi-way switch, and each channel of each sixth multi-way switch is respectively connected with a CSOUT pin of a temperature compensation crystal oscillator; the first multi-way switch, the second multi-way switch, the third multi-way switch, the fourth multi-way switch, the fifth multi-way switch and the sixth multi-way switch are 32-channel multi-way switches.
The further technical scheme is that the first multi-way switch, the second multi-way switch, the third multi-way switch, the fourth multi-way switch, the fifth multi-way switch and the sixth multi-way switch are respectively realized by an ADG732 chip.
The further technical scheme is that the first single-pole double-throw switch, the second single-pole double-throw switch, the third single-pole double-throw switch and the fourth single-pole double-throw switch are respectively realized by an ADG849 chip or a MAX4729 chip.
The further technical scheme is that the first inverter, the second inverter, the third inverter, the fourth inverter and the fifth inverter are respectively realized by five channels in a CD74HC04 chip.
The further technical scheme is that the tri-state buffer is realized by a CD74HC125 chip.
The utility model has the beneficial technical effects that:
the application discloses multi-functional crystal oscillator temperature is automatic correction compensator that floats frequently, corresponding peripheral control circuit has been increased for temperature compensation crystal oscillator, through tristate buffer, reverser and the single-pole double-throw switch that links to each other with temperature compensation crystal oscillator, combine each control terminal can realize producing different states, cooperation temperature variation compensation crystal oscillator, thereby can flatten the original temperature curve of temperature compensation crystal oscillator, reach high accuracy frequency, satisfy the industrial use needs. In addition, the compensation of 1024 temperature compensation crystal oscillators at one time can be realized by adding the multi-way switch in the circuit structure, and the efficiency is higher.
Drawings
FIG. 1 is a circuit diagram of a multi-functional crystal oscillator temperature drift auto-correction compensator disclosed in the present application.
Detailed Description
The following describes the embodiments of the present invention with reference to the accompanying drawings.
The application discloses multi-functional crystal oscillator temperature drift automatic correction compensation machine please refer to fig. 1, and this multi-functional crystal oscillator temperature drift automatic correction compensation machine includes temperature compensation crystal oscillator T1, and temperature compensation crystal oscillator T1's VDD pin is connected with power supply D's positive pole, and power supply D's negative pole ground connection, VDD pin still passes through filter capacitor C0 ground connection. The control signal source DO15 is connected with the input end of the tri-state buffer, the output end of the tri-state buffer is connected with the SCLK pin of the temperature compensation crystal oscillator T1, and the serial clock high-impedance state control end DO10 is connected with the enabling end of the tri-state buffer through the first reverser. In this application, the tri-state buffer is implemented by a buffer chip, and in this application, a CD74HC125 chip is adopted, the chip includes 4 channels, each channel provides three pins to form a tri-state buffer, and when the tri-state buffer is implemented, the control signal source DO15 is connected to the CD74HC125 chipThe input end 1A pin of one channel of the U1, the output end 1Y pin of the channel are connected with the SCLK pin of the temperature compensation crystal oscillator T1, and the serial clock high-impedance state control end DO10 is connected with the SCLK pin of the channel through the first inverter
And (7) a pin. In this application, the inverter is implemented by an inverter chip, the application adopts a CD74HC04 chip, the chip has 6 channels, each channel provides two pins to form an inverter, when the implementation is specific, the serial clock high impedance state control terminal DO10 is connected to the input terminal 1A pin of one channel of the CD74HC04 chip U2, and the output terminal of the channel is connected to the input terminal 1A pin of the other channel
With pins connecting to U1 of CD74HC125 chip
And (7) a pin.
The digital signal input terminal DO11 is connected with one active terminal NC of the first single-pole double-throw switch U3 through a second inverter, the other active terminal NO of the first single-pole double-throw switch U3 is connected with the signal output terminal DI0, in the application, the second inverter is realized by another channel of the CD74HC04 chip U2, then DO11 is connected with the 2A pin of the CD74HC04 chip U2, and the output terminal of the corresponding channel
The pin is connected to one active terminal NC of the first single-pole double-throw switch U3, and each single-pole double-throw switch in this application is implemented by a switch chip, for example, an ADG849 chip or a MAX4729 chip.
The fixed end COM of the first single-pole double-throw switch U3 is connected with one movable end NO of the second single-pole double-throw switch U4, and the other movable end NC of the second single-pole double-throw switch U4 is connected with the fixed end COM of the third single-pole double-throw switch U5. The fixed end COM of the second single-pole double-throw switch U4 is connected to the CSOUT pin of the temperature compensated crystal oscillator T1. One active terminal NC of the third single-pole double-throw switch U5 is suspended, the other active terminal NO is connected with the first digital multimeter M1, and the other end of the first digital multimeter M1 is grounded.
The clipping sine wave output control signal closing control end DO13 is connected with the control end IN of the first single-pole double-throw switch U3 and the control end IN of the third single-pole double-throw switch U5 through a third inverter, similarly, the third inverter is realized by another channel of the CD74HC04 chip U2, then the DO13 is connected with the 4A pin of the CD74HC04 chip U2, and the output end of the channel is connected with the 4A pin of the CD74HC04 chip U2
The pins connect the IN pins of U3 and U5.
The control end DO14 is opened by the control signal of the clipped sine wave output, and is connected with the control end IN of the second single-pole double-throw switch U4 through a fourth inverter, and similarly, the fourth inverter is realized by another channel of the CD74HC04 chip U2, then DO14 is connected with the 5A pin of the CD74HC04 chip U2, and the output end of the channel is connected with the output end of the 5A pin
The pin is connected to the IN pin of U4.
The signal input high-resistance state control end DO12 is connected with the control end IN of the fourth single-pole double-throw switch U6 through a fifth inverter, similarly, the fifth inverter is realized by another channel of the CD74HC04 chip U2, then the DO12 is connected with the 3A pin of the CD74HC04 chip U2, and the output end of the channel
The pin is connected to the IN pin of U6. One active terminal NC of the fourth spdt switch U6 is floating, and the other active terminal NO is connected to the output terminal of the tri-state buffer, i.e., to the 1Y pin of the U1 of the CD74HC125 chip. The fixed end COM of the fourth single-pole double-throw switch U6 is connected with a second digital multimeter M2, and the other end of the second digital multimeter M2 is grounded.
The CSOUT pin of the temperature compensation crystal oscillator T1 is grounded through a first capacitor C1 and a first resistor R1 respectively, the CSOUT pin of the temperature compensation crystal oscillator T1 is connected with a second capacitor C2 and an amplifier in sequence and then connected with a frequency counter M3, the other end of the frequency counter M3 is grounded, in the application, three amplifiers D1, D2 and D3 are connected between the second capacitor and the frequency counter M3, and the three amplifiers D1, D2 and D3 provide a 66dB amplification effect together.
The application provides a circuit mechanism can produce different states through U1, U2 and each single-pole double-throw switch, the cooperation temperature change, compensation temperature compensation crystal oscillator T1, through getting off temperature and frequency, modify temperature compensation crystal oscillator T1's memory value reading, flatten the original temperature curve of temperature compensation crystal oscillator T1, thereby can reach the high accuracy frequency, can reach-40 ~ 85 degrees centigrade through the actual measurement, 1 ppm.
In addition, the multi-way switch is additionally arranged for the circuit structure, so that the compensation of the plurality of temperature compensation crystal oscillators T1 can be realized at one time, and the positive electrode of the power supply D is respectively connected with the VDD pin of each temperature compensation crystal oscillator T1 through the multi-way switch. The output terminal of the tri-state buffer is connected to the SCLK pin of each temperature compensated crystal oscillator T1 through the multi-way switch, that is, in this application, the 1Y pin of U1 is connected to the SCLK pin of each temperature compensated crystal oscillator T1 through the multi-way switch. The fixed end COM of the second single-pole double-throw switch U4 is respectively connected with the CSOUT pin of each temperature compensation crystal oscillator through a multi-way switch. This application adopts 32 passways's multi-way switch to can once only realize the compensation to 1024 temperature compensation crystal oscillator T1, the structure of its adoption is:
the positive pole of the power supply D is connected with the common terminal D of the first multi-way switch K1, each channel of the first multi-way switch K1 is respectively connected with the common terminal D of one second multi-way switch K2, and each channel of each second multi-way switch K2 is respectively connected with the VDD pin of one temperature compensation crystal oscillator T1. As shown in fig. 1, one channel S1 of the first multi-way switch K1 is connected to the common terminal D of the second multi-way switch K2, the other channels S2-S32 of the first multi-way switch K1 are also connected to the common terminals D of the other second multi-way switches K2, one channel S1 of the second multi-way switch K2 is connected to the VDD pin of one temperature compensated crystal oscillator T1, and the other channels S2-S32 of the second multi-way switch K2 are also connected to the VDD pins of the other temperature compensated crystal oscillators.
The output end of the tri-state buffer is connected with the common end D of the third multi-way switch K3, each channel of the third multi-way switch K3 is respectively connected with the common end D of a fourth multi-way switch K4, and each channel of each fourth multi-way switch K4 is respectively connected with an SCLK pin of a temperature compensation crystal oscillator T1. That is, pin 1Y of the U1 is connected to the common terminal D of the third multi-way switch K3, one channel S1 of the third multi-way switch K3 is connected to the common terminal D of the fourth multi-way switch K4 as shown in fig. 1, the other channels S2-S32 are also connected to the common terminals D of the other fourth multi-way switches K4, one channel S1 of the fourth multi-way switch K4 is connected to the SCLK pin of one temperature compensated crystal oscillator T1 as shown in fig. 1, and the other channels S2-S32 are also connected to the SCLK pins of the other temperature compensated crystal oscillators.
The fixed end COM of the second single-pole double-throw switch U4 is connected to the common end D of the fifth multi-way switch K5, each channel of the fifth multi-way switch K5 is connected to the common end D of a sixth multi-way switch K6, and each channel of each sixth multi-way switch K6 is connected to the CSOUT pin of a temperature compensated crystal oscillator T1. That is, the COM pin of the second single-pole double-throw switch U4 is connected to the common terminal D of the fifth multi-way switch K5, one channel S1 of the fifth multi-way switch K5 is connected to the common terminal D of the sixth multi-way switch K6 as shown in fig. 1, and the other channels S2-S32 are also connected to the common terminals D of the other sixth multi-way switches K6, one channel S1 of the sixth multi-way switch K6 is connected to the CSOUT pin of one temperature-compensated crystal oscillator T1 as shown in fig. 1, and the other channels S2-S32 are also connected to the CSOUT pins of the other temperature-compensated crystal oscillators.
In addition, the CSOUT pin of each temperature compensated crystal oscillator is not directly connected to the amplifier after being connected to the second capacitor C2, but is connected to one channel of a sixth multi-way switch K6 of the 32 channels by the second capacitor C2, and the common terminal D of the sixth multi-way switch K6 is connected to the frequency counter M3 after being connected to the amplifier.
The multi-way switches K1-K6 are 32-channel multi-way switches, and are realized by adopting ADG732 chips. The 1024 temperature compensation crystal oscillators can be compensated at one time under the action of the multi-way switch, and the efficiency is higher. It should be noted that, in actual implementation, the present application includes more necessary peripheral circuits besides the circuit structure shown in fig. 1, and the present application does not show the peripheral circuits in detail.
What has been described above is only a preferred embodiment of the present application, and the present invention is not limited to the above embodiments. It is to be understood that other modifications and variations directly derivable or suggested by those skilled in the art without departing from the spirit and scope of the present invention are to be considered as included within the scope of the present invention.
Claims (7)
1. The multifunctional crystal oscillator temperature frequency drift automatic correction compensator is characterized by comprising a temperature compensation crystal oscillator, wherein a VDD pin of the temperature compensation crystal oscillator is connected with the anode of a power supply, and the VDD pin is grounded through a filter capacitor; the control signal source is connected with the input end of the tri-state buffer, the output end of the tri-state buffer is connected with the SCLK pin of the temperature compensation crystal oscillator, and the serial clock high-resistance state control end is connected with the enabling end of the tri-state buffer through the first reverser; a digital signal input end is connected with one movable end of a first single-pole double-throw switch through a second reverser, the other movable end of the first single-pole double-throw switch is connected with a signal output end, the fixed end of the first single-pole double-throw switch is connected with one movable end of a second single-pole double-throw switch, the other movable end of the second single-pole double-throw switch is connected with the fixed end of a third single-pole double-throw switch, and the fixed end of the second single-pole double-throw switch is connected with a CSOUT pin of the temperature compensation crystal oscillator; one movable end of the third single-pole double-throw switch is suspended, and the other movable end of the third single-pole double-throw switch is connected with the first digital multimeter; a clipping sine wave output control signal closing control end is connected with the control end of the first single-pole double-throw switch and the control end of the third single-pole double-throw switch through a third reverser; the clipping sine wave output control signal starting control end is connected with the control end of the second single-pole double-throw switch through a fourth reverser; the signal input high-resistance state control end is connected with the control end of a fourth single-pole double-throw switch through a fifth reverser, one movable end of the fourth single-pole double-throw switch is suspended, the other movable end of the fourth single-pole double-throw switch is connected with the output end of the tri-state buffer, and the fixed end of the fourth single-pole double-throw switch is connected with a second digital multimeter; the CSOUT pin of the temperature compensation crystal oscillator is grounded through a first capacitor and a first resistor respectively, and is connected with a frequency counter after being sequentially connected with a second capacitor and an amplifier.
2. The multifunctional crystal oscillator temperature drift automatic correction compensator of claim 1, wherein the multifunctional crystal oscillator temperature drift automatic correction compensator comprises at least two temperature compensation crystal oscillators, and the positive pole of the power supply is connected to the VDD pin of each temperature compensation crystal oscillator through a multi-way switch; the output end of the tri-state buffer is respectively connected with an SCLK pin of each temperature compensation crystal oscillator through a multi-way switch; and the fixed end of the second single-pole double-throw switch is respectively connected with the CSOUT pin of each temperature compensation crystal oscillator through a multi-way switch.
3. The multifunctional crystal oscillator temperature drift autocorrection compensator of claim 2, wherein the multifunctional crystal oscillator temperature drift autocorrection compensator comprises 1024 temperature compensated crystal oscillators, the positive pole of the power supply is connected to the common terminal of a first multi-way switch, each channel of the first multi-way switch is respectively connected to the common terminal of a second multi-way switch, and each channel of each second multi-way switch is respectively connected to the VDD pin of one temperature compensated crystal oscillator; the output end of the tri-state buffer is connected with the common end of a third multi-way switch, each channel of the third multi-way switch is respectively connected with the common end of a fourth multi-way switch, and each channel of each fourth multi-way switch is respectively connected with an SCLK pin of a temperature compensation crystal oscillator; the fixed end of the second single-pole double-throw switch is connected with the common end of a fifth multi-way switch, each channel of the fifth multi-way switch is respectively connected with the common end of a sixth multi-way switch, and each channel of each sixth multi-way switch is respectively connected with a CSOUT pin of a temperature compensation crystal oscillator; the first multi-way switch, the second multi-way switch, the third multi-way switch, the fourth multi-way switch, the fifth multi-way switch and the sixth multi-way switch are 32-channel multi-way switches.
4. The multifunctional crystal oscillator temperature drift automatic correction compensator of claim 3, wherein the first multiplexer, the second multiplexer, the third multiplexer, the fourth multiplexer, the fifth multiplexer and the sixth multiplexer are respectively implemented by ADG732 chip.
5. The multifunctional crystal oscillator temperature drift automatic correction compensator of any one of claims 1-4, characterized in that the first single-pole double-throw switch, the second single-pole double-throw switch, the third single-pole double-throw switch and the fourth single-pole double-throw switch are respectively realized by an ADG849 chip or a MAX4729 chip.
6. The multi-functional crystal oscillator temperature drift auto-correction compensator of any one of claims 1-4, wherein the first inverter, the second inverter, the third inverter, the fourth inverter and the fifth inverter are implemented by five channels in a CD74HC04 chip, respectively.
7. The multifunctional crystal oscillator temperature drift auto-correction compensator of any one of claims 1-4, wherein the tri-state buffer is implemented by a CD74HC125 chip.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921386104.5U CN210168012U (en) | 2019-08-23 | 2019-08-23 | Multifunctional crystal oscillator temperature frequency drift automatic correction compensator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921386104.5U CN210168012U (en) | 2019-08-23 | 2019-08-23 | Multifunctional crystal oscillator temperature frequency drift automatic correction compensator |
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| CN210168012U true CN210168012U (en) | 2020-03-20 |
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| CN201921386104.5U Active CN210168012U (en) | 2019-08-23 | 2019-08-23 | Multifunctional crystal oscillator temperature frequency drift automatic correction compensator |
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