CN110855292B - Digital-to-analog conversion device - Google Patents
Digital-to-analog conversion device Download PDFInfo
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- CN110855292B CN110855292B CN201911337850.XA CN201911337850A CN110855292B CN 110855292 B CN110855292 B CN 110855292B CN 201911337850 A CN201911337850 A CN 201911337850A CN 110855292 B CN110855292 B CN 110855292B
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 98
- 239000003990 capacitor Substances 0.000 claims abstract description 238
- 239000011324 bead Substances 0.000 claims description 9
- 239000003381 stabilizer Substances 0.000 claims description 8
- 238000007667 floating Methods 0.000 claims description 4
- 239000000725 suspension Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000001914 filtration Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- GSFCOAGADOGIGE-UHFFFAOYSA-N 2-amino-2-methyl-3-phosphonooxypropanoic acid Chemical compound OC(=O)C(N)(C)COP(O)(O)=O GSFCOAGADOGIGE-UHFFFAOYSA-N 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
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Abstract
The embodiment of the invention discloses a digital-to-analog conversion device. The device comprises: the first voltage input end is connected with one end of the first resistor; the other end of the second resistor is connected with one end of the third resistor and the channel A inverting input pin of the amplifier; the other end of the third resistor is connected with one end of the first capacitor, one end of the fourth resistor, the cathode of the first diode and the pin A of the output channel of the amplifier; the channel A in-phase input pin of the amplifier is connected with one end of a fifth resistor and one end of a sixth resistor; the output channel B pin of the amplifier is connected with one end of the eighth resistor, the third capacitor, the cathode of the second diode and the ninth resistor; an eighth resistor, the other end of which is connected with one end of the tenth resistor and the channel B inverting input pin of the amplifier; and a channel B non-inverting input pin of the amplifier is connected with one end of the twelfth resistor and one end of the thirteenth resistor. By applying the scheme provided by the embodiment of the invention, the accurate transmission of the torque measured value between the singlechip and other equipment can be ensured.
Description
Technical Field
The invention relates to the technical field of torque measurement, in particular to a digital-to-analog conversion device.
Background
With the development of the domestic automobile industry, new automobile types are endlessly layered, and automobile bench and road tests are more and more important. Modern engines require increased rotational speed to improve mechanical performance and efficiency, while torque is an important indicator of motor and engine performance, thus requiring high accuracy, high reliability torque measurements. And, the measured data needs to be transmitted to a display device for display.
The torque measured value acquired by the torque acquisition equipment passes through the singlechip in the transmission process and then is digital signals, and when the torque measured value is transmitted to other equipment from the singlechip, analog signals can only be transmitted. Therefore, in order to solve the problem of accurate transmission of the torque measurement value, a digital-to-analog conversion device is needed.
Disclosure of Invention
The invention provides a digital-to-analog conversion device which is used for carrying out digital-to-analog conversion on a torque measured value and ensuring accurate transmission of the torque measured value between a singlechip and other equipment. The specific technical scheme is as follows.
In a first aspect, an embodiment of the present invention provides a digital-to-analog conversion apparatus, including:
the first voltage input end is connected with one end of the first resistor; the other end of the first resistor is connected with one end of the second resistor;
The other end of the second resistor is connected with one end of the third resistor and the channel A inverting input pin of the amplifier; the other end of the third resistor is connected with one end of the first capacitor, one end of the fourth resistor, the cathode of the first diode and the pin A of the output channel of the amplifier;
the other end of the first capacitor is grounded; the positive electrode of the first diode is grounded;
The channel A in-phase input pin of the amplifier is connected with one ends of a fifth resistor and a sixth resistor; the other end of the fifth resistor is grounded; the other end of the sixth resistor is connected with one end of the seventh resistor; the other end of the seventh resistor is connected with one end of the second capacitor; the other end of the second capacitor is grounded;
The output channel B pin of the amplifier is connected with one end of the eighth resistor, the third capacitor, the cathode of the second diode and the ninth resistor;
the other end of the eighth resistor is connected with one end of the tenth resistor and the channel B inverting input pin of the amplifier; the other end of the tenth resistor is connected with one end of the eleventh resistor; the other end of the eleventh resistor is connected with the first voltage input end; the other end of the third capacitor is grounded; the anode of the second diode is grounded;
the channel B in-phase input pin of the amplifier is connected with one end of a twelfth resistor and one end of a thirteenth resistor; the twelfth resistor is grounded at the other end; the other end of the thirteenth resistor is connected with one end of the fourteenth resistor; the other end of the fourteenth resistor is connected with one end of the fourth capacitor; the other end of the fourth capacitor is grounded;
A negative supply voltage pin of the amplifier is connected with a second voltage input end; the positive supply voltage pin of the amplifier is connected to the third voltage input.
Optionally, the method further comprises:
A first voltage conversion device, a second voltage conversion device, a third voltage conversion device, and a fourth voltage conversion device;
The first voltage output end of the first voltage conversion device is connected with the fourth voltage input end of the second voltage conversion device; the second voltage output end of the second voltage conversion device is connected with the fifth voltage input end of the third voltage conversion device; the first voltage output end of the first voltage conversion device is also connected with the sixth voltage input end of the fourth voltage conversion device; a third voltage output end of the third voltage conversion device is connected with the first voltage input end; the fourth voltage output end of the fourth voltage conversion device is connected with the second voltage input end; the fifth voltage output end of the fourth voltage conversion device is connected with the third voltage input end;
The seventh voltage input end of the first voltage conversion device is 12 volts, the first voltage output end is 5.4 volts, the second voltage output end is 3.3 volts, the third voltage output end is 1.6 volts, and the fourth voltage output end and the fifth voltage output end are 5.1 volts.
Optionally, the first voltage conversion device includes:
the seventh voltage input end is connected with one end of the fifth capacitor, one end of the fifteenth resistor and a voltage input pin of the switching regulator;
The other end of the fifth capacitor is grounded; the fifteenth resistor is connected with an enabling input pin and a disabling input pin of the switching regulator at the other end; the ground pin of the switching regulator is grounded;
the bootstrap voltage pin of the switching regulator is connected with one end of the sixth capacitor; the other end of the sixth capacitor is connected with a switching node pin of the switching voltage stabilizer, one end of the first inductor and the cathode of the third diode;
The positive electrode of the third diode is grounded; the other end of the first inductor is connected with one end of a sixteenth resistor, one end of a seventh capacitor, one end of an eighth capacitor and one end of a ninth capacitor and the first voltage output end;
The other end of the sixteenth resistor is connected with one end of the seventeenth resistor and the feedback pin of the switching regulator; the seventeenth resistor is grounded at the other end;
And the other ends of the seventh capacitor, the eighth capacitor and the ninth capacitor are grounded.
Optionally, the fifth capacitance is 4.7 microfarads; the sixth capacitance is 100 nanofarads; the seventh capacitance is 10 microfarads; the eighth capacitance is 10 microfarads; the ninth capacitance is 100 nanofarads;
The fifteenth resistor is 100 kilo ohms; the sixteenth resistance is 63.4 kilo ohms; the seventeenth resistor is 10.7 kiloohms;
The first inductance is 33 microhenries; the third diode is MBR0520LT1G.
Optionally, the second voltage conversion device includes:
the fourth voltage input end is connected with one end of the tenth capacitor and one end of the eleventh capacitor, and the first voltage input pin and the second voltage input pin of the voltage stabilizer;
The tenth capacitor and the eleventh capacitor are grounded at the other ends; the ground pin of the voltage stabilizer is grounded;
the output voltage pin of the voltage stabilizer is connected with one end of the twelfth capacitor, the thirteenth capacitor, the fourteenth capacitor and the magnetic bead;
The twelfth capacitor, the thirteenth capacitor and the fourteenth capacitor are grounded at the other ends; the other end of the magnetic bead is connected with the second voltage output end.
Optionally, the tenth capacitor is 1 microfarad; the eleventh capacitance is 100 nanofarads; the twelfth capacitance is 1 microfarad; the thirteenth capacitance is 100 nanofarads; the fourteenth capacitor is 100 picofarads; the magnetic beads were 0 ohms.
Optionally, the third voltage conversion device includes:
The fifth voltage input end is connected with one end of the fifteenth capacitor, one end of the sixteenth capacitor and a power supply voltage input pin of the voltage conversion chip;
The other ends of the fifteenth capacitor and the sixteenth capacitor are grounded; the ground pin of the voltage conversion chip is grounded;
the reference voltage output pin of the voltage conversion chip is connected with the seventeenth capacitor, the eighteenth capacitor and one end of the second inductor;
the seventeenth capacitor and the eighteenth capacitor are grounded at the other ends; the other end of the second inductor is connected with the nineteenth capacitor and the third voltage output end;
The nineteenth capacitor is grounded at the other end;
the fifteenth capacitance is 4.7 microfarads, the sixteenth capacitance is 100 nanofarads, the seventeenth capacitance is 1 microfarad, and the eighteenth capacitance is 100 nanofarads; the nineteenth capacitance is 100 nanofarads; the second inductance is 10 microhenries.
Optionally, the fourth voltage conversion device includes:
The sixth voltage input end is connected with one end of the twentieth capacitor and one end of the twenty-first capacitor, and an input voltage pin, a first logic input pin and a second logic input pin of the output power supply; the twenty-second capacitor is grounded at the other end; the twenty-first capacitor is grounded at the other end and is connected with a mode pin of the output power supply;
The floating capacitor positive connection pin of the output power supply is connected with one end of the twenty-second capacitor; the other end of the twenty-second capacitor is connected with a negative connecting pin of the suspension capacitor of the output power supply;
an output voltage pin of the output power supply is connected with one end of the twenty-third capacitor and one end of the twenty-fourth capacitor; the other ends of the twenty-third capacitor and the twenty-fourth capacitor are grounded;
An input connecting pin of the input power supply is connected with one end of the nineteenth resistor; the nineteenth resistor is grounded at the other end;
The positive low-voltage difference output pin of the input power supply is connected with one end of a twenty-fifth capacitor, one end of a twenty-sixth capacitor and one end of a twenty-eighth resistor and the fourth voltage output end; the twenty-fifth capacitor and the twenty-sixth capacitor are grounded at the other ends;
The other end of the twenty-first resistor is connected with one end of the twenty-first resistor and a feedback input pin of the positive low-dropout voltage regulator of the input power supply; the other end of the twenty-first resistor is connected with one end of the twenty-seventh capacitor, one end of the twenty-eighth capacitor and one end of the twenty-second resistor and the ground pin of the input power supply;
The twenty-seventh capacitor is connected with the positive reference bypass pin of the input power supply at the other end; the twenty-eighth capacitor is connected with the negative reference bypass pin of the input power supply at the other end; the other end of the twenty-second resistor is connected with one end of the twenty-third resistor and a feedback input pin of the negative low-dropout regulator of the input power supply;
The other end of the twenty-third resistor is connected with one end of the twenty-ninth capacitor, one end of the thirty-first capacitor, a negative low-voltage difference output pin of the input power supply and the fifth voltage output end; and the twenty-ninth capacitor and the thirty-eighth capacitor are connected with the other end of the ground.
Optionally, the twentieth capacitance is 10 microfarads; the twenty-first capacitance is 100 nanofarads; the twenty-second capacitance is 1 microfarad; the twenty-third capacitance is 10 microfarads; the twenty-fourth capacitance is 100 nanofarads; the twenty-fifth capacitance is 10 microfarads; the twenty-sixth capacitance is 100 nanofarads; the twenty-seventh capacitance is 10 nanofarads; the twenty-eighth capacitance is 10 nanofarads; the twenty-ninth capacitance is 10 microfarads; the thirty-first capacitor is 100 nanofarads;
The nineteenth resistor is 200 kilo ohms; the twentieth resistor is 330 kilo ohms; the twenty-first resistor is 100 kiloohms; the twenty-second resistance is 100 kilo ohms; the twenty-third resistor is 330 kilo ohms.
Optionally, the first resistance is 10.2 kilo-ohms; the second resistor is 360 ohms; the third resistor is 33 kiloohms; the fifth resistance is 33 kiloohms; the sixth resistor is 360 ohms; the seventh resistance is 10.2 kilo ohms; the eighth resistor is 33 kiloohms; the tenth resistor is 10.2 kiloohms; the eleventh resistor is 360 ohms; the twelfth resistor is 33 kiloohms; the thirteenth resistance is 10.2 kilo-ohms; the fourteenth resistor is 360 ohms;
the first capacitance is 10 nanofarads; the second capacitance is 10 nanofarads; the third capacitance is 10 nanofarads; the fourth capacitance is 10 nanofarads.
As can be seen from the foregoing, the digital-to-analog conversion apparatus provided in the embodiment of the present invention may include: the first voltage input end is connected with one end of the first resistor; the other end of the first resistor is connected with one end of the second resistor; the other end of the second resistor is connected with one end of the third resistor and the channel A inverting input pin of the amplifier; the other end of the third resistor is connected with one end of the first capacitor, one end of the fourth resistor, the cathode of the first diode and the pin A of the output channel of the amplifier; the other end of the first capacitor is grounded; the positive electrode of the first diode is grounded; the channel A in-phase input pin of the amplifier is connected with one end of a fifth resistor and one end of a sixth resistor; a fifth resistor, the other end of which is grounded; the other end of the sixth resistor is connected with one end of the seventh resistor; the other end of the seventh resistor is connected with one end of the second capacitor; the other end of the second capacitor is grounded; the output channel B pin of the amplifier is connected with one end of the eighth resistor, the third capacitor, the cathode of the second diode and the ninth resistor; an eighth resistor, the other end of which is connected with one end of the tenth resistor and the channel B inverting input pin of the amplifier; a tenth resistor, the other end of which is connected with one end of the eleventh resistor; an eleventh resistor, the other end of which is connected with the first voltage input end; the other end of the third capacitor is grounded; the anode of the second diode is grounded; the channel B in-phase input pin of the amplifier is connected with one end of a twelfth resistor and one end of a thirteenth resistor; a twelfth resistor, the other end of which is grounded; a thirteenth resistor, the other end of which is connected with one end of the fourteenth resistor; a fourteenth resistor, the other end of which is connected with one end of the fourth capacitor; a fourth capacitor, the other end of which is grounded; a negative supply voltage pin of the amplifier connected to the second voltage input; the positive power supply voltage pin of the amplifier is connected with the third voltage input end, so that the torque measured value can be converted from a digital signal to an analog signal based on the analog-to-digital converter, and the accurate transmission of the torque measured value between the singlechip and other equipment can be ensured. Of course, it is not necessary for any one product or method of practicing the invention to achieve all of the advantages set forth above at the same time.
The innovation points of the embodiment of the invention include:
1. The torque measured value is converted from a digital signal to an analog signal based on the analog-to-digital converter, so that accurate transmission of the torque measured value between the singlechip and other equipment can be ensured.
2. The voltage value suitable for the digital-to-analog conversion device to work can be obtained through conversion of the voltage conversion device, and the digital-to-analog conversion device is ensured to work normally.
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 apparent that the drawings in the following description are only some embodiments of the invention. Other figures may be derived from these figures without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic diagram of a digital-to-analog conversion apparatus according to the present invention;
FIG. 2 is a schematic diagram of a voltage converting apparatus according to the present invention;
FIG. 3 is a schematic diagram of another voltage converting apparatus according to the present invention;
FIG. 4 is a schematic diagram of another voltage converting apparatus according to the present invention;
fig. 5 is a schematic structural diagram of another voltage conversion device according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without any inventive effort, are intended to be within the scope of the invention.
It should be noted that the terms "comprising" and "having" and any variations thereof in the embodiments of the present invention and the accompanying drawings are intended to cover non-exclusive inclusions. A process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed but may alternatively include other steps or elements not listed or inherent to such process, method, article, or apparatus.
The embodiment of the invention discloses a digital-to-analog conversion device which can convert a torque measured value from a digital signal to an analog signal, thereby ensuring accurate transmission of the torque measured value between a singlechip and other equipment. The following describes embodiments of the present invention in detail.
Fig. 1 is a schematic structural diagram of a digital-to-analog conversion device according to an embodiment of the present invention. The digital-to-analog conversion device comprises:
The first voltage input end is connected with one end of a first resistor R55; the other end of the first resistor R55 is connected with one end of the second resistor R56;
A second resistor R56, the other end of which is connected to one end of the third resistor R1 and to pin 2 of the amplifier, i.e. -INA (channel a inverting input) pin; the other end of the third resistor R1 is connected with one end of the first capacitor C1, one end of the fourth resistor R7, the cathode of the first diode D2 and the pin 1 of the amplifier, namely the pin OUTA (output channel A);
the other end of the first capacitor C1 is grounded; the positive electrode of the first diode D2 is grounded;
Pin 3 of the amplifier, namely +INA (channel A in-phase input) pin, is connected with one end of a fifth resistor R8 and one end of a sixth resistor R58; a fifth resistor R8, the other end of which is grounded; the other end of the sixth resistor R58 is connected with one end of the seventh resistor R57; the other end of the seventh resistor R57 is connected with one end of the second capacitor C13; the other end of the second capacitor C13 is grounded;
pin 7 of the amplifier, namely the OUTB (output channel B) pin, is connected with one end of the eighth resistor R49, the third capacitor C15, the cathode of the second diode D13 and the ninth resistor R2;
An eighth resistor R49, the other end of which is connected to one end of the tenth resistor R48, and pin 6 of the amplifier, i.e., -INB (channel B inverting input) pin; a tenth resistor R48, the other end of which is connected with one end of an eleventh resistor R47; an eleventh resistor R47, the other end of which is connected with the first voltage input end; the other end of the third capacitor C15 is grounded; the anode of the second diode D13 is grounded;
pin 5 of the amplifier, namely +INB (channel B in-phase input) pin, is connected with one end of twelfth resistor R50 and thirteenth resistor R59; a twelfth resistor R50, the other end of which is grounded; a thirteenth resistor R59, the other end of which is connected with one end of a fourteenth resistor R60; the other end of the fourteenth resistor R60 is connected with one end of the fourth capacitor C14; a fourth capacitor C14, the other end of which is grounded;
Pin 4 of the amplifier, the V- (negative supply voltage) pin, is connected to the second voltage input; the pin 8 of the amplifier, the V + (positive supply voltage) pin, is connected to a third voltage input.
The amplifier may be an ADA4522-2ARZ. ADA4522-2ARZ is a two-channel, zero drift operational amplifier, ground detect input and rail-to-rail output, optimized for overall accuracy over time, temperature and voltage conditions. The wide operating voltage and temperature range, as well as the high open loop gain and very low dc and ac errors, make the device well suited for amplifying very small input signals and capable of accurately reproducing larger signals in a variety of applications.
The ADA4522-2ARZ performance was assigned to 5.0V,30V and 55V supply voltages. These devices operate at voltages ranging from 4.5V to 55V, and are well suited for use with 5V,10V,12V and 30V single ended power supplies, or with higher single power supplies and + -2.5V dual power supplies. ADA4522-2ARZ adopts on-chip filtering technology to realize high immunity to electromagnetic interference. The rated operating temperature range of ADA4522-2ARZ is an extended industrial temperature range, -40℃to +125℃. An 8-pin MSOP, an 8-pin SOIC, a 14-pin SOIC, and a 14-pin TSSOP package are used.
The first resistor R55 is 10.2 kilo-ohms; the second resistor R56 is 360 ohms; the third resistor R1 is 33 kiloohms; the fifth resistor R8 is 33 kilo ohms; the sixth resistor R58 is 360 ohms; the seventh resistor R57 is 10.2 kilo-ohms; the eighth resistor R49 is 33 kilo ohms; the tenth resistor R48 is 10.2 kilo ohms; the eleventh resistor R47 is 360 ohms; the twelfth resistor R50 is 33 kilo ohms; the thirteenth resistor R59 is 10.2 kilo-ohms; the fourteenth resistor R60 is 360 ohms. The first resistor R55, the second resistor R56, the seventh resistor R57, and the sixth resistor R58 function to amplify and follow.
The first capacitor C1 is 10 nanofarads; the second capacitor C13 is 10 nanofarads; the third capacitor C15 is 10 nanofarads; the fourth capacitance C14 is 10 nanofarads. The first diode D2 functions as an antistatic.
As can be seen from the foregoing, the digital-to-analog conversion apparatus provided in the embodiment of the present invention may include: the first voltage input end is connected with one end of the first resistor; the other end of the first resistor is connected with one end of the second resistor; the other end of the second resistor is connected with one end of the third resistor and the channel A inverting input pin of the amplifier; the other end of the third resistor is connected with one end of the first capacitor, one end of the fourth resistor, the cathode of the first diode and the pin A of the output channel of the amplifier; the other end of the first capacitor is grounded; the positive electrode of the first diode is grounded; the channel A in-phase input pin of the amplifier is connected with one end of a fifth resistor and one end of a sixth resistor; a fifth resistor, the other end of which is grounded; the other end of the sixth resistor is connected with one end of the seventh resistor; the other end of the seventh resistor is connected with one end of the second capacitor; the other end of the second capacitor is grounded; the output channel B pin of the amplifier is connected with one end of the eighth resistor, the third capacitor, the cathode of the second diode and the ninth resistor; an eighth resistor, the other end of which is connected with one end of the tenth resistor and the channel B inverting input pin of the amplifier; a tenth resistor, the other end of which is connected with one end of the eleventh resistor; an eleventh resistor, the other end of which is connected with the first voltage input end; the other end of the third capacitor is grounded; the anode of the second diode is grounded; the channel B in-phase input pin of the amplifier is connected with one end of a twelfth resistor and one end of a thirteenth resistor; a twelfth resistor, the other end of which is grounded; a thirteenth resistor, the other end of which is connected with one end of the fourteenth resistor; a fourteenth resistor, the other end of which is connected with one end of the fourth capacitor; a fourth capacitor, the other end of which is grounded; a negative supply voltage pin of the amplifier connected to the second voltage input; the positive power supply voltage pin of the amplifier is connected with the third voltage input end, so that the torque measured value can be converted from a digital signal to an analog signal based on the analog-to-digital converter, and the accurate transmission of the torque measured value between the singlechip and other equipment can be ensured.
As an implementation manner of the embodiment of the present invention, the digital-to-analog conversion apparatus may further include: the first voltage conversion device, the second voltage conversion device, the third voltage conversion device, and the fourth voltage conversion device.
The first voltage output end of the first voltage conversion device is connected with the fourth voltage input end of the second voltage conversion device; the second voltage output end of the second voltage conversion device is connected with the fifth voltage input end of the third voltage conversion device; the first voltage output end of the first voltage conversion device is also connected with the sixth voltage input end of the fourth voltage conversion device; the third voltage output end of the third voltage conversion device is connected with the first voltage input end; the fourth voltage output end of the fourth voltage conversion device is connected with the second voltage input end; the fifth voltage output end of the fourth voltage conversion device is connected with the third voltage input end.
The seventh voltage input end of the first voltage conversion device is 12 volts, the first voltage output end is 5.4 volts, the second voltage output end is 3.3 volts, the third voltage output end is 1.6 volts, and the fourth voltage output end and the fifth voltage output end are 5.1 volts.
In one implementation, as shown in fig. 2, the first voltage conversion device includes:
a seventh Voltage Input terminal connected to the fifth capacitor C17, one end of the fifteenth resistor R65, and a pin 5 (VIN) of the switching regulator;
a fifth capacitor C17, the other end of which is grounded; a fifteenth resistor R65, the other end of which is connected to pin 4 of the switching regulator, namely shdn_n (enable and disable input) pin; pin 2 of the switching regulator, i.e. GND (Ground) pin, is grounded;
pin 1 of the switching regulator, namely CB (bootstrap voltage) pin, is connected with one end of a sixth capacitor C16; the other end of the sixth capacitor C16 is connected with a pin 6 of the switching regulator, namely a pin SW (switch node), one end of the first inductor L1 and the cathode of the third diode D14;
the positive electrode of the third diode D14 is grounded; the other end of the first inductor L1 is connected with one end of a sixteenth resistor R51, a seventh capacitor C18, an eighth capacitor C19 and a ninth capacitor C20 and a first voltage output end;
a sixteenth resistor R51, the other end of which is connected to one end of the seventeenth resistor R52 and pin 3 of the switching regulator, namely, FB (feedback) pin; seventeenth resistor R52, the other end of which is grounded;
the other ends of the seventh capacitor C18, the eighth capacitor C19 and the ninth capacitor C20 are grounded.
The switching regulator may be an LMR16006XDDCR. In the voltage conversion device, a 12V voltage is converted into a 5.4V voltage by a switching regulator. The chip LMR16006XDDCR has wide working input voltage of 1.4V to 36V, adjustable output voltage of 2.5V to 15V and output current of 600mA.
The fifth capacitance C17 is 4.7 microfarads; the sixth capacitance C16 is 100 nanofarads; the seventh capacitance C18 is 10 microfarads; the eighth capacitor C19 is 10 microfarads; the ninth capacitance C20 is 100 nanofarads. The effect of each capacitor is filtering. The fifth capacitor C17, the seventh capacitor C18 and the eighth capacitor C19 also have the function of energy storage.
The fifteenth resistor R65 is 100 kilo ohms; sixteenth resistor R51 is 63.4 kilo-ohms; seventeenth resistor R52 is 10.7 kilo-ohms. The sixteenth resistor R51 and the seventeenth resistor R52 function to regulate the output voltage.
The first inductance L1 is 33 microhenries; the function is to store energy. The third diode D14 is MBR0520LT1G, which acts to prevent reverse connection.
In one implementation, as shown in fig. 3, the second voltage conversion device includes:
a fourth voltage input terminal connected to one end of the tenth capacitor C22 and the eleventh capacitor C23, and to pin 2 and pin 4 of the voltage regulator, i.e., vin (voltage input) pin;
The tenth capacitor C22 and the eleventh capacitor C23 are grounded at the other ends; pin 1 of the voltage regulator, namely GND (Ground) pin is grounded;
pin 3 of the voltage regulator, namely the Out (output voltage) pin, is connected with one end of the twelfth capacitor C24, the thirteenth capacitor C25, the fourteenth capacitor C21 and the magnetic bead R12;
The twelfth capacitor C24, the thirteenth capacitor C25 and the fourteenth capacitor C21 are grounded at the other ends; the other end of the magnetic bead R12 is connected with a second voltage output end.
The tenth capacitor C22 is 1 microfarad; the eleventh capacitance C23 is 100 nanofarads; the twelfth capacitance C24 is 1 microfarad; the thirteenth capacitance C25 is 100 nanofarads; the fourteenth capacitor C21 is 100 picofarads; the magnetic beads R12 were 0 European. The effect of each capacitor and resistor is filtering. The tenth capacitor C22 and the twelfth capacitor C24 also have the function of energy storage.
In one implementation, as shown in fig. 4, the third voltage conversion device includes:
A fifth voltage input terminal connected to the fifteenth capacitor C32, one terminal of the sixteenth capacitor C31, and pin 1 of the voltage conversion chip, i.e., IN (power supply voltage input) pin;
The other ends of the fifteenth capacitor C32 and the sixteenth capacitor C31 are grounded; pin 3 of the voltage conversion chip, i.e. GND (Ground) pin, is grounded;
pin 2 of the voltage conversion chip, namely the OUT (reference voltage output) pin, is connected with seventeenth capacitor C55, eighteenth capacitor C33 and one end of second inductor L2;
Seventeenth capacitor C55 and eighteenth capacitor C33, and the other ends are grounded; the other end of the second inductor L2 is connected with a nineteenth capacitor C54 and a third voltage output end; nineteenth capacitor C54, the other end of which is grounded.
The fifteenth capacitor C32 is 4.7 microfarads, the sixteenth capacitor C31 is 100 nanofarads, the seventeenth capacitor C55 is 1 microfarads, and the eighteenth capacitor C33 is 100 nanofarads; nineteenth capacitance C54 is 100 nanofarads; the second inductance L2 is 10 microhenries.
In one implementation, as shown in fig. 5, the fourth voltage conversion device includes:
A sixth Voltage Input terminal connected to one end of the twentieth capacitor C4 and one end of the twenty-first capacitor C7, and a pin 11 of the output power source, i.e., a VIN (Voltage Input) pin, a pin 1 and a pin 13, i.e., en+ and EN- (logic Input) pins; a twentieth capacitor C4, the other end of which is grounded; a twenty-first capacitor C7, the other end of which is grounded and connected to the pin 14 of the output power supply, i.e., MODE pin;
The pin 10 of the output power supply, namely the pin C+ (the floating capacitor is connected with) is connected with one end of a twenty-second capacitor C6; the twenty-second capacitor C6, the other end is connected with pin 7 of the output power supply, namely the pin of the C- (suspension capacitor negative connection);
A pin 6 of the output power supply, namely a pin Vout (output voltage), is connected with one end of a twenty-third capacitor C10 and one end of a twenty-fourth capacitor C12; a twenty-third capacitor C10 and a twenty-fourth capacitor C12, and the other ends are grounded;
Pin 2 of the input power supply, namely an RT (input connection) pin, is connected with one end of a nineteenth resistor R54; nineteenth resistor R54, the other end of which is grounded;
pin 12 of the input power supply, i.e., ldo+ (positive low dropout) pin, is connected to one end of a twenty-fifth capacitor C3, a twenty-sixth capacitor C2, a twentieth resistor R3, and a fourth voltage output terminal; a twenty-fifth capacitor C3 and a twenty-sixth capacitor C2, and the other ends are grounded;
The twenty-first resistor R3, the other end connects with one end of the twenty-first resistor R4, and the pin 15 of the input power source, namely the feedback input pin of the ADJ+ (positive low dropout regulator); the twenty-first resistor R4, the other end is connected with one end of the twenty-seventh capacitor C5, the twenty-eighth capacitor C11 and the twenty-second resistor R5, and the pin 17 of the input power source, i.e. the GND (Ground) pin;
A twenty-seventh capacitor C5, the other end of which is connected to pin 16 of the input power supply, namely, a byp+ (positive reference bypass) pin; a twenty eighth capacitor C11, the other end of which is connected to pin 3 of the input power supply, namely, a BYP- (negative reference bypass) pin; the other end of the twenty-second resistor R5 is connected with one end of the twenty-third resistor R6 and a pin 4 of an input power supply, namely a feedback input pin of the ADJ- (negative low dropout regulator);
The other end of the twenty-third resistor R6 is connected with one end of the twenty-ninth capacitor C8 and one end of the thirty-eighth capacitor C9, a pin 5 of an input power supply, namely an LDO (low dropout output) pin and a fifth voltage output end; twenty-ninth capacitor C8, thirty-second capacitor C9, and the other end is grounded.
The input power may be LTC3260.LTC3260 is a low noise bipolar output power supply. The input voltage range is 4.5V-32V, and the current of up to 100mA can be output. The charge pump operates in a low quiescent current burst mode or a low noise constant frequency mode.
The logic "high" on the en+ pin in LTC3260 enables a positive low dropout (ldo+) regulator. The RT pin is used to program the input connection of the switching frequency. When the EN-pin is driven logic "high", the RT pin will be fixed at 1.2V. If the RT pin is connected to GND, the switching frequency defaults to a fixed 500kHz. The LDO-pin connects the BYP capacitor to GND to reduce LDO-output noise, which remains floating if not used. The LDO-pin requires a low ESR (Equivalent series resistance) capacitor, at least 2 microfarads to ground, to ensure stability. The logic "high" on the EN-pin enables the inverting charge pump and the negative LDO regulator.
The twentieth capacitor C4 is 10 microfarads; the twenty-first capacitor C7 is 100 nanofarads; the twenty-second capacitance C6 is 1 microfarad; the twenty-third capacitance C10 is 10 microfarads; the twenty-fourth capacitance C12 is 100 nanofarads; the twenty-fifth capacitance C3 is 10 microfarads; the twenty-sixth capacitance C2 is 100 nanofarads; the twenty-seventh capacitor C5 is 10 nanofarads; the twenty-eighth capacitor C11 is 10 nanofarads; the twenty-ninth capacitance C8 is 10 microfarads; the thirty-first capacitor C9 is 100 nanofarads.
Nineteenth resistor R54 is 200 kohms; the twentieth resistor R3 is 330 kilo ohms; the twenty-first resistor R4 is 100 kilo-ohms; the twenty-second resistor R5 is 100 kilo-ohms; the twenty-third resistor R6 is 330 kilo-ohms.
The voltage value suitable for the digital-to-analog conversion device to work can be obtained through conversion of the voltage conversion device, and the digital-to-analog conversion device is ensured to work normally.
Those of ordinary skill in the art will appreciate that: the drawing is a schematic diagram of one embodiment and the modules or flows in the drawing are not necessarily required to practice the invention.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A digital to analog conversion apparatus, comprising:
The first voltage input end is connected with one end of a first resistor (R55); the other end of the first resistor (R55) is connected with one end of the second resistor (R56);
The other end of the second resistor (R56) is connected with one end of the third resistor (R1) and the channel A inverting input pin of the amplifier; the other end of the third resistor (R1) is connected with one end of the first capacitor (C1), one end of the fourth resistor (R7), the negative electrode of the first diode (D2) and the pin A of the output channel of the amplifier;
The other end of the first capacitor (C1) is grounded; the first diode (D2) is grounded at the positive electrode;
The channel A non-inverting input pin of the amplifier is connected with one end of a fifth resistor (R8) and one end of a sixth resistor (R58); the other end of the fifth resistor (R8) is grounded; the other end of the sixth resistor (R58) is connected with one end of the seventh resistor (R57); the other end of the seventh resistor (R57) is connected with one end of the second capacitor (C13); the other end of the second capacitor (C13) is grounded;
The output channel B pin of the amplifier is connected with one end of an eighth resistor (R49), a third capacitor (C15), the cathode of a second diode (D13) and one end of a ninth resistor (R2);
The eighth resistor (R49) is connected with one end of the tenth resistor (R48) and the channel B inverting input pin of the amplifier; the tenth resistor (R48) is connected with one end of the eleventh resistor (R47) at the other end; -said eleventh resistor (R47), the other end being connected to said first voltage input; the other end of the third capacitor (C15) is grounded; the anode of the second diode (D13) is grounded;
The channel B non-inverting input pin of the amplifier is connected with one end of a twelfth resistor (R50) and one end of a thirteenth resistor (R59); the twelfth resistor (R50) is grounded at the other end; the thirteenth resistor (R59) is connected with one end of the fourteenth resistor (R60) at the other end; the fourteenth resistor (R60) is connected with one end of the fourth capacitor (C14) at the other end; the other end of the fourth capacitor (C14) is grounded;
A negative supply voltage pin of the amplifier is connected with a second voltage input end; the positive supply voltage pin of the amplifier is connected to the third voltage input.
2. The digital to analog conversion apparatus according to claim 1, further comprising:
A first voltage conversion device, a second voltage conversion device, a third voltage conversion device, and a fourth voltage conversion device;
The first voltage output end of the first voltage conversion device is connected with the fourth voltage input end of the second voltage conversion device; the second voltage output end of the second voltage conversion device is connected with the fifth voltage input end of the third voltage conversion device; the first voltage output end of the first voltage conversion device is also connected with the sixth voltage input end of the fourth voltage conversion device; a third voltage output end of the third voltage conversion device is connected with the first voltage input end; the fourth voltage output end of the fourth voltage conversion device is connected with the second voltage input end; the fifth voltage output end of the fourth voltage conversion device is connected with the third voltage input end;
The seventh voltage input end of the first voltage conversion device is 12 volts, the first voltage output end is 5.4 volts, the second voltage output end is 3.3 volts, the third voltage output end is 1.6 volts, and the fourth voltage output end and the fifth voltage output end are 5.1 volts.
3. The digital to analog conversion apparatus according to claim 2, wherein said first voltage conversion means comprises:
the seventh voltage input end is connected with one end of a fifth capacitor (C17), one end of a fifteenth resistor (R65) and a voltage input pin of the switching regulator;
the other end of the fifth capacitor (C17) is grounded; -said fifteenth resistor (R65), the other end being connected to an enable and disable input pin of said switching regulator; the ground pin of the switching regulator is grounded;
The bootstrap voltage pin of the switching regulator is connected with one end of a sixth capacitor (C16); the other end of the sixth capacitor (C16) is connected with a switching node pin of the switching voltage stabilizer, one end of the first inductor (L1) and the cathode of the third diode (D14);
the positive electrode of the third diode (D14) is grounded; the other end of the first inductor (L1) is connected with one end of a sixteenth resistor (R51), a seventh capacitor (C18), an eighth capacitor (C19), a ninth capacitor (C20) and the first voltage output end;
The sixteenth resistor (R51) is connected with one end of the seventeenth resistor (R52) and the feedback pin of the switching regulator; the seventeenth resistor (R52) is grounded at the other end;
the other ends of the seventh capacitor (C18), the eighth capacitor (C19) and the ninth capacitor (C20) are grounded.
4. The digital to analog conversion apparatus according to claim 3,
The fifth capacitance (C17) is 4.7 microfarads; the sixth capacitance (C16) is 100 nanofarads; the seventh capacitance (C18) is 10 microfarads; the eighth capacitance (C19) is 10 microfarads; the ninth capacitance (C20) is 100 nanofarads;
The fifteenth resistor (R65) is 100 kilo ohms; the sixteenth resistor (R51) is 63.4 kilo-ohms; the seventeenth resistor (R52) is 10.7 kohms;
the first inductance (L1) is 33 microhenries; the third diode (D14) is MBR0520LT1G.
5. The digital to analog conversion apparatus according to claim 2, wherein said second voltage conversion means comprises:
the fourth voltage input end is connected with one end of a tenth capacitor (C22), one end of an eleventh capacitor (C23) and a first voltage input pin and a second voltage input pin of the voltage stabilizer;
the tenth capacitor (C22) and the eleventh capacitor (C23) are grounded at the other ends; the ground pin of the voltage stabilizer is grounded;
the output voltage pin of the voltage stabilizer is connected with one end of a twelfth capacitor (C24), a thirteenth capacitor (C25), a fourteenth capacitor (C21) and a magnetic bead (R12);
the twelfth capacitor (C24), the thirteenth capacitor (C25) and the fourteenth capacitor (C21) are grounded at the other ends; the other end of the magnetic bead (R12) is connected with the second voltage output end.
6. The digital to analog conversion apparatus of claim 5, wherein,
The tenth capacitance (C22) is 1 microfarad; the eleventh capacitance (C23) is 100 nanofarads; the twelfth capacitance (C24) is 1 microfarad; the thirteenth capacitance (C25) is 100 nanofarads; the fourteenth capacitance (C21) is 100 picofarads; the magnetic beads (R12) were 0 European.
7. The digital to analog conversion apparatus according to claim 2, wherein said third voltage conversion means comprises:
The fifth voltage input end is connected with one end of a fifteenth capacitor (C32), one end of a sixteenth capacitor (C31) and a power supply voltage input pin of the voltage conversion chip;
The fifteenth capacitor (C32) and the sixteenth capacitor (C31) are grounded at the other ends; the ground pin of the voltage conversion chip is grounded;
The reference voltage output pin of the voltage conversion chip is connected with one end of a seventeenth capacitor (C55), an eighteenth capacitor (C33) and a second inductor (L2);
the seventeenth capacitor (C55) and the eighteenth capacitor (C33) are grounded at the other ends; the other end of the second inductor (L2) is connected with a nineteenth capacitor (C54) and the third voltage output end;
the nineteenth capacitor (C54) is grounded at the other end;
The fifteenth capacitor (C32) is 4.7 microfarads, the sixteenth capacitor (C31) is 100 nanofarads, the seventeenth capacitor (C55) is 1 microfarad, and the eighteenth capacitor (C33) is 100 nanofarads; the nineteenth capacitance (C54) is 100 nanofarads; the second inductance (L2) is 10 microhenries.
8. The digital to analog conversion apparatus according to claim 2, wherein said fourth voltage conversion means comprises:
the sixth voltage input end is connected with one end of a twentieth capacitor (C4) and one end of a twenty-first capacitor (C7), and an input voltage pin, a first logic input pin and a second logic input pin of an output power supply; the twentieth capacitor (C4) is grounded at the other end; the twenty-first capacitor (C7) is grounded at the other end and is connected with the mode pin of the output power supply;
the floating capacitor positive connection pin of the output power supply is connected with one end of a twenty-second capacitor (C6); the twenty-second capacitor (C6) is connected with the negative connecting pin of the suspension capacitor of the output power supply at the other end;
An output voltage pin of the output power supply is connected with one end of a twenty-third capacitor (C10) and one end of a twenty-fourth capacitor (C12); the twenty-third capacitor (C10) and the twenty-fourth capacitor (C12) are connected with the other end of the ground;
An input connection pin of the input power supply is connected with one end of a nineteenth resistor (R54); the nineteenth resistor (R54) is grounded at the other end;
The positive low-voltage difference output pin of the input power supply is connected with one end of a twenty-fifth capacitor (C3), a twenty-sixth capacitor (C2), a twenty-first resistor (R3) and the fourth voltage output end; the twenty-fifth capacitor (C3) and the twenty-sixth capacitor (C2) are connected with the other end of the capacitor to the ground;
The twenty-first resistor (R3) is connected with one end of the twenty-first resistor (R4) and a feedback input pin of the positive low dropout regulator of the input power supply; the twenty-first resistor (R4) is connected with one end of the twenty-seventh capacitor (C5), one end of the twenty-eighth capacitor (C11) and one end of the twenty-second resistor (R5) and a ground pin of the input power supply;
the twenty-seventh capacitor (C5) is connected with the positive reference bypass pin of the input power supply at the other end; the twenty-eighth capacitor (C11) is connected with the negative reference bypass pin of the input power supply at the other end; the other end of the twenty-second resistor (R5) is connected with one end of the twenty-third resistor (R6) and a feedback input pin of the negative low dropout voltage regulator of the input power supply;
the twenty-third resistor (R6) is connected with one end of a twenty-ninth capacitor (C8), one end of a thirty-eighth capacitor (C9), a negative low-voltage difference output pin of the input power supply and the fifth voltage output end; the twenty-ninth capacitor (C8) and the thirty-eighth capacitor (C9) are connected with the other end of the capacitor through the ground.
9. The digital to analog conversion apparatus according to claim 8, wherein,
The twentieth capacitance (C4) is 10 microfarads; the twenty-first capacitance (C7) is 100 nanofarads; the twenty-second capacitance (C6) is 1 microfarad; the twenty-third capacitance (C10) is 10 microfarads; the twenty-fourth capacitance (C12) is 100 nanofarads; the twenty-fifth capacitance (C3) is 10 microfarads; the twenty-sixth capacitance (C2) is 100 nanofarads; the twenty-seventh capacitance (C5) is 10 nanofarads; the twenty-eighth capacitance (C11) is 10 nanofarads; the twenty-ninth capacitance (C8) is 10 microfarads; the thirty-first capacitor (C9) is 100 nanofarads;
The nineteenth resistor (R54) is 200 kohms; -the twentieth resistor (R3) is 330 kohms; -said twenty-first resistance (R4) is 100 kilo-ohms; -said twenty-second resistance (R5) is 100 kilo-ohms; the twenty-third resistor (R6) is 330 kilo-ohms.
10. The digital to analog conversion apparatus according to any of claims 1 to 9, wherein,
-Said first resistance (R55) is 10.2 kilo-ohms; -said second resistance (R56) is 360 ohms; the third resistance (R1) is 33 kilo-ohms; -said fifth resistance (R8) is 33 kilo-ohms; the sixth resistor (R58) is 360 ohms; the seventh resistance (R57) is 10.2 kilo-ohms; the eighth resistor (R49) is 33 kilo-ohms; the tenth resistor (R48) is 10.2 kilo-ohms; the eleventh resistor (R47) is 360 ohms; the twelfth resistor (R50) is 33 kilo-ohms; -said thirteenth resistance (R59) is 10.2 kohms; the fourteenth resistor (R60) is 360 ohms;
the first capacitance (C1) is 10 nanofarads; the second capacitance (C13) is 10 nanofarads; the third capacitance (C15) is 10 nanofarads; the fourth capacitance (C14) is 10 nanofarads.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204304983U (en) * | 2014-12-08 | 2015-04-29 | 重庆跃达电力设备有限公司 | For the frequency conversion process circuit of power monitoring circuit device |
| WO2016019642A1 (en) * | 2014-08-07 | 2016-02-11 | 中兴通讯股份有限公司 | Device for preventing current from flowing backward |
| CN109445510A (en) * | 2018-10-29 | 2019-03-08 | 合肥本源量子计算科技有限责任公司 | A kind of voltage source |
| CN211183935U (en) * | 2019-12-23 | 2020-08-04 | 北京百联长通科技有限公司 | Digital-to-analog conversion device |
-
2019
- 2019-12-23 CN CN201911337850.XA patent/CN110855292B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016019642A1 (en) * | 2014-08-07 | 2016-02-11 | 中兴通讯股份有限公司 | Device for preventing current from flowing backward |
| CN204304983U (en) * | 2014-12-08 | 2015-04-29 | 重庆跃达电力设备有限公司 | For the frequency conversion process circuit of power monitoring circuit device |
| CN109445510A (en) * | 2018-10-29 | 2019-03-08 | 合肥本源量子计算科技有限责任公司 | A kind of voltage source |
| CN211183935U (en) * | 2019-12-23 | 2020-08-04 | 北京百联长通科技有限公司 | Digital-to-analog conversion device |
Non-Patent Citations (1)
| Title |
|---|
| TCL GM21机芯液晶彩电逆变器板维修(二);荣国忠;;家电检修技术;20120801(15);第6-8页 * |
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