CN220455737U - TTL signal level adjustable power supply circuit - Google Patents
TTL signal level adjustable power supply circuit Download PDFInfo
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- CN220455737U CN220455737U CN202322278881.0U CN202322278881U CN220455737U CN 220455737 U CN220455737 U CN 220455737U CN 202322278881 U CN202322278881 U CN 202322278881U CN 220455737 U CN220455737 U CN 220455737U
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- 239000003990 capacitor Substances 0.000 claims description 21
- 239000003381 stabilizer Substances 0.000 claims description 18
- 238000006243 chemical reaction Methods 0.000 claims description 17
- 230000001105 regulatory effect Effects 0.000 abstract description 8
- 230000003321 amplification Effects 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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Abstract
The utility model provides a TTL signal level adjustable power supply circuit, which comprises a regulated power supply component and an adjustable voltage component, wherein the regulated power supply component comprises a linear voltage regulator, the input end of the linear voltage regulator is connected with fixed voltage, the ground end of the linear voltage regulator is connected with the adjustable voltage component, and the output end of the linear voltage regulator is a power supply output end. By utilizing the characteristic that the voltage difference of the output end of the linear voltage regulator LDO relative to the ground end is a fixed value, the continuously adjustable voltage can be output by the output end of the linear voltage regulator LDO through connecting the voltage component which can be continuously adjusted to the ground end, the continuously adjustable voltage can be output by the output end of the linear voltage regulator LDO, and meanwhile, the output power of the output end of the linear voltage regulator LDO is far greater than the power supply of the input power of the adjustable voltage component.
Description
Technical Field
The utility model relates to the technical field of chip testing, in particular to a TTL signal level adjustable power supply circuit.
Background
The existing LDOs have two types, one is that the output voltage is a fixed value, so that TTL level signals are regulated in a step mode; the voltage can be continuously adjusted through ADJ, the voltage can be continuously adjusted by adjusting a potentiometer, and the adjustment mode has the problems of low adjustment speed and inaccuracy.
In view of this, it is a technical problem in the art to generate a power supply that is convenient to regulate and has a continuously adjustable voltage.
Disclosure of Invention
The utility model aims to provide a TTL signal level adjustable power supply circuit.
The utility model aims to solve the problem of inconvenient adjustment when the level of the existing TTL signal is continuously adjustable.
In order to solve the problems, the utility model is realized by the following technical scheme:
the TTL signal level adjustable power supply circuit comprises a regulated power supply component and an adjustable voltage component, wherein the regulated power supply component comprises a linear voltage regulator, the input end of the linear voltage regulator is connected with a fixed voltage, the ground end of the linear voltage regulator is connected with the adjustable voltage component, and the output end of the linear voltage regulator is a power supply output end
Further, the adjustable voltage component comprises a controllable voltage component and an amplifying component which are connected, the controllable voltage component is connected with the IIC bus, and the controllable voltage component is used for outputting a specified voltage signal after receiving an IIC signal; the amplifying assembly is connected with the linear voltage stabilizer and is used for amplifying the voltage signal and transmitting the voltage signal to the linear voltage stabilizer.
Further, the amplifying assembly comprises an amplifier, a first resistor connected between an inverting input end and an output end of the amplifier, and a second resistor connected between a non-inverting input end of the amplifier and the output end of the controllable voltage assembly, wherein a VDD pin of the amplifier is connected with a power supply, and a VSS pin of the amplifier is grounded.
Further, the controllable voltage component comprises a digital-to-analog conversion chip; the serial clock pin of the digital-to-analog conversion chip is connected with the clock line of the IIC bus, and the serial data pin of the digital-to-analog conversion chip is connected with the data line of the IIC bus; the output end of the digital-to-analog conversion chip is connected with the input end of the amplifying component.
Further, the output pin of the linear voltage stabilizer is connected with a capacitor and an electrolytic capacitor, the other ends of the capacitor and the electrolytic capacitor are grounded, and the common end of the electrolytic capacitor and the output pin of the linear voltage stabilizer is the output end of the linear voltage stabilizer.
Further, a second capacitor is connected to the common terminal of the linear voltage stabilizer and the adjustable voltage component, and the other end of the second capacitor is grounded.
Compared with the prior art, the technical scheme of the utility model has the following beneficial effects:
(1) According to the TTL signal level adjustable power supply circuit, by utilizing the characteristic that the voltage difference of the output end of the LDO relative to the ground end is a fixed value, the continuously adjustable voltage component is connected to the ground end, so that the continuously adjustable voltage output by the output end of the LDO can be realized, the continuously adjustable voltage output by the output end of the LDO is realized, and meanwhile, the output power of the output end of the LDO is far greater than the power input by the adjustable voltage component.
(2) The adjustable voltage component comprises a controllable voltage component and an amplifying component which are connected, wherein the controllable voltage component receives an IIC signal and then outputs a designated voltage signal, the voltage signal is amplified by the amplifying component and then is transmitted to the linear voltage stabilizer to amplify power again and then is stably output, and the IIC signal can control the controllable voltage component to output a continuous voltage signal, so that the amplifying component outputs the continuous voltage signal, and the linear voltage stabilizer outputs the continuous level signal.
Drawings
Fig. 1 is a schematic diagram of a TTL signal level adjustable power supply circuit according to an embodiment of the present utility model.
Illustration of:
a regulated power supply assembly-10; a controllable voltage assembly-20; an amplifying assembly-30.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1, a TTL signal level adjustable power supply circuit includes a regulated power supply component 10 and an adjustable voltage component, where the regulated power supply component 10 includes a linear regulator U106, the linear regulator U106 of this embodiment adopts LD1117-1.2/1117-ADJ, an input terminal 3 pin of the linear regulator U106 is connected to a fixed voltage 5V, a ground terminal 1 pin of the linear regulator U106 is connected to the adjustable voltage component, and an output terminal of the linear regulator U106 is a power output terminal. By utilizing the characteristic that the voltage difference of the output end of the linear voltage regulator LDO relative to the ground end is a fixed value, the output end of the linear voltage regulator LDO can output continuously adjustable voltage by connecting a continuously adjustable voltage component to the ground end, and meanwhile, the output power of the output end of the linear voltage regulator LDO is far greater than the power supply of the input power of the adjustable voltage component. In this embodiment, the output pin of the linear voltage regulator U106 is connected to a capacitor C301 and an electrolytic capacitor C302, the other end of the capacitor C301 is grounded, the other end of the electrolytic capacitor C302 is grounded, and the common end of the electrolytic capacitor C302 and the output pin (4 pins or 2 pins) of the linear voltage regulator U106 is the output end VI2C1 of the linear voltage regulator. The common terminal of the linear voltage stabilizer U106 and the adjustable voltage component is connected with a second capacitor C304, and the other end of the second capacitor C304 is grounded to filter the voltage signal input by the adjustable voltage component.
The adjustable voltage component comprises a controllable voltage component 20 and an amplifying component 30 which are connected, wherein the controllable voltage component is connected with the IIC bus and is used for outputting a designated voltage signal after receiving an IIC signal. The amplifying assembly 30 is connected to the linear voltage regulator U106, and the amplifying assembly 30 is used for amplifying the voltage signal and transmitting the voltage signal to the linear voltage regulator U106. The IIC signal is adjusted so that the controllable voltage component outputs a continuous voltage signal, and the continuous voltage signal is transmitted to the linear voltage regulator U106 to output a continuous level signal after being subjected to power amplification by the amplifying component, and meanwhile, the continuous voltage signal is subjected to power amplification again.
In this embodiment, the amplifying assembly 30 includes an amplifier U104, a first resistor R268 connected between the inverting input terminal and the output terminal of the amplifier U104, and a second resistor R271 connected between the non-inverting input terminal of the amplifier U104 and the output terminal of the controllable voltage assembly 20, wherein the VDD pin of the amplifier U104 is connected to the power supply and the VSS pin is grounded. The inverting input terminal and the output terminal of the amplifier U104 are connected through the first resistor R268, so that the amplifying component 30 forms a voltage follower amplifier, and the voltage input to the controllable voltage component 20 is kept unchanged, and the power is amplified, so that a larger current is provided. The amplifier U104 of the present embodiment employs the MCP6001T.
In this embodiment, the controllable voltage assembly 20 includes a digital-to-analog conversion chip U105, and the digital-to-analog conversion chip U105 employs a DAC7571IDBVR. The serial clock pin 5 pin of the digital-to-analog conversion chip U105 is connected with the clock line of the IIC bus, the serial data pin 4 pin of the digital-to-analog conversion chip U105 is connected with the data line of the IIC bus, so that the digital-to-analog conversion chip U105 is used for receiving IIC signals and outputting specified voltage signals according to the IIC signals, the output end 1 pin of the digital-to-analog conversion chip U105 is connected with the input end of the amplifying assembly 3-, namely, the output end 1 pin of the digital-to-analog conversion chip U105 is connected with the non-inverting input end of the amplifier U104, and the voltage signals are transmitted to the amplifier U104 for power amplification. It will be appreciated that pin 3 of the digital to analog conversion chip U105 is connected to a power supply, and pin 2 is grounded.
According to the TTL signal level adjustable power supply circuit, the IIC signal is utilized to realize continuous adjustment of the output voltage signal of the digital-to-analog conversion chip, the voltage is unchanged after the continuous adjustable voltage signal is amplified by the voltage follower amplifier, the power is increased, namely, the voltage value of the voltage signal after the voltage follower amplifier is continuously adjustable; the voltage signal after power amplification is input into the ground end of the linear voltage stabilizer, and the continuous adjustable voltage output by the output end of the linear voltage stabilizer LDO is realized by utilizing the characteristic that the voltage difference of the output end of the linear voltage stabilizer LDO relative to the ground end is a fixed value, and meanwhile, the power is increased, namely, larger current can be provided. The utility model innovatively uses the pin characteristics of the LDO, realizes continuous adjustment of TTL signal level, and has simple structure and high precision.
While the foregoing description illustrates and describes the preferred embodiments of the present utility model, it is to be understood that the utility model is not limited to the forms disclosed herein, but is not to be construed as limited to other embodiments, but is capable of use in various other combinations, modifications and environments and is capable of changes or modifications within the scope of the inventive concept, either as described above or as a matter of skill or knowledge in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the utility model are intended to be within the scope of the appended claims.
Claims (6)
1. The TTL signal level adjustable power supply circuit is characterized by comprising a voltage-stabilized power supply component and an adjustable voltage component, wherein the voltage-stabilized power supply component comprises a linear voltage stabilizer, the input end of the linear voltage stabilizer is connected with fixed voltage, the ground end of the linear voltage stabilizer is connected with the adjustable voltage component, and the output end of the linear voltage stabilizer is a power supply output end.
2. The TTL signal level adjustable power supply circuit according to claim 1, wherein the adjustable voltage component comprises a controllable voltage component and an amplifying component which are connected, the controllable voltage component is connected with an IIC bus, and the controllable voltage component is used for outputting a specified voltage signal after receiving an IIC signal; the amplifying assembly is connected with the linear voltage stabilizer and is used for amplifying the voltage signal and transmitting the voltage signal to the linear voltage stabilizer.
3. The TTL signal level adjustable power supply circuit of claim 2, wherein the amplifying assembly comprises an amplifier, a first resistor connected between an inverting input terminal and an output terminal of the amplifier, a second resistor connected between a non-inverting input terminal of the amplifier and an output terminal of the controllable voltage assembly, and a VDD pin of the amplifier is connected to a power supply and a VSS pin is grounded.
4. The TTL signal level adjustable power supply circuit of claim 2, wherein said controllable voltage component comprises a digital to analog conversion chip; the serial clock pin of the digital-to-analog conversion chip is connected with the clock line of the IIC bus, and the serial data pin of the digital-to-analog conversion chip is connected with the data line of the IIC bus; the output end of the digital-to-analog conversion chip is connected with the input end of the amplifying component.
5. The power supply circuit of claim 1, wherein the output pin of the linear voltage regulator is connected with a capacitor and an electrolytic capacitor, the other ends of the capacitor and the electrolytic capacitor are grounded, and the common end of the electrolytic capacitor and the output pin of the linear voltage regulator is the output end of the linear voltage regulator.
6. The TTL signal level adjustable power supply circuit of claim 1, wherein a second capacitor is connected to a common terminal of the linear voltage regulator and the adjustable voltage component, and the other terminal of the second capacitor is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322278881.0U CN220455737U (en) | 2023-08-23 | 2023-08-23 | TTL signal level adjustable power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322278881.0U CN220455737U (en) | 2023-08-23 | 2023-08-23 | TTL signal level adjustable power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220455737U true CN220455737U (en) | 2024-02-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322278881.0U Active CN220455737U (en) | 2023-08-23 | 2023-08-23 | TTL signal level adjustable power supply circuit |
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| Country | Link |
|---|---|
| CN (1) | CN220455737U (en) |
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2023
- 2023-08-23 CN CN202322278881.0U patent/CN220455737U/en active Active
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