Two-way power supply pluggable level conversion board
By designing a two-way powered pluggable level conversion board, the level conversion chip and voltage comparison mechanism of symmetrical layout is used to solve the problem of level mismatch between different ICs, dynamic adjustment and precise matching of levels are achieved, the design process is simplified, and the stability and debugging efficiency of the system are improved.
Patent Information
- Application Number
- CN202510224135.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-27
- Publication Date
- 2025-06-10
AI Technical Summary
Different logic level standards may be used between different ICs, which makes the necessity of logic level conversion more prominent, especially in the verification process of ADC. Under the fixed limitation of the interface level standards of the data acquisition system, the digital output level of the ADC may be higher or lower than the level standards of the interface device, resulting in the problem of level mismatch.
A two-way powered pluggable level conversion board is designed to layout two level conversion chips on a separate PCB component in a symmetrical and optimized manner, realize dynamic adjustment and precise matching of levels, support 16-channel data level conversion, and determine the insertion method through a voltage comparison mechanism.
It simplifies the complexity of PCB design, avoids complex voltage regulation and matching steps in traditional solutions, reduces design workload and potential design errors, achieves seamless adaptation under different levels, shortens the test cycle, improves the overall efficiency of system debugging, and improves the overall performance of the circuit system and the stability of the system.
Smart Images
Figure CN120128159A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of integrated circuit technology, and particularly relates to a bidirectional power supply pluggable level conversion board. Background Art
[0002] With the rapid development of electronic technology, digital ICs with different operating voltages have emerged in large numbers, which greatly enriches the diversity and flexibility of digital systems. However, this diversity also brings a significant problem: different ICs may adopt different logic level standards, which directly makes the necessity of logic level conversion more prominent. Logic level conversion is the key to ensuring the correct transmission and recognition of digital signals with different level standards in the system.
[0003] In the verification process of an ADC (Analog-to-Digital Converter), data acquisition systems such as FPGA (Field Programmable Gate Array), MCU (Microcontroller Unit), and DSP (Digital Signal Processor) are needed to capture data and thus execute the verification process. Usually, the interface level standards of these data acquisition systems are fixed, and the acceptable level adjustment range is relatively limited. However, the digital outputs of some ADCs have a wide voltage range, which may cause their digital output levels to be higher or lower than the level standards of interface devices such as FPGAs. Facing this problem of level mismatch, a level converter becomes an indispensable component for achieving adaptation between different levels, ensuring the correct transmission of data and the smooth progress of ADC verification.
[0004] Among level conversion devices, there is a type called bidirectional level conversion devices, which can achieve level conversion in two directions. However, due to design reasons, such devices usually have specific requirements for the supply voltage, that is, VCCA (the supply voltage on the lower level side) must be less than VCCB (the supply voltage on the higher level side). This limitation ensures that the device can stably and reliably achieve level conversion under normal operating conditions.
[0005] For example, the interface voltage range of an ADC is 1.8 - 5V, and the voltage of the acquisition system is 3.1 - 3.3V. Under the supply voltage limitation conditions of the above level conversion device, if it is necessary to meet the wide voltage range of the ADC (the ADC digital interface voltage is higher or lower than the interface voltage of the acquisition system), the usual practice is to use two sets of level conversion chips on the board, which makes the PCB design complex and requires attention to the correct hardware connection under different voltages during testing, affecting the testing efficiency. Summary of the Invention
[0006] The purpose of the present invention is to provide a bidirectional power supply pluggable level conversion board to solve the problems in the background art.
[0007] To solve the above technical problems, the present invention provides a bidirectional power supply pluggable level conversion board, including a plurality of level conversion chips; The plurality of level conversion chips are arranged on a single PCB component in a symmetric and optimized manner, jointly constituting a pluggable level conversion board.
[0008] In one embodiment, the pluggable level conversion board is inserted on a slot adapter board, and is connected to an analog-to-digital converter and an acquisition system through the slot adapter board.
[0009] In one embodiment, the digital output port of the analog-to-digital converter is defined as port A, and the receiving port of the acquisition system is defined as port B; When the voltage value of port A is lower than that of port B, the pluggable level conversion board is inserted into the slot adapter board in a forward manner; when the voltage value of port A is higher than that of port B, the pluggable level conversion board is inserted into the slot adapter board in a reverse manner; wherein the forward manner is that the Pin1 foot of the pluggable level conversion board is close to the side of port A, and the reverse manner is that the Pin1 foot of the pluggable level conversion board is close to the side of port B.
[0010] In one embodiment, multiple pluggable level conversion boards are inserted on the slot adapter board, or multiple level conversion chips are arranged on the pluggable level conversion board to achieve more channels of data level conversion.
[0011] The bidirectional power supply pluggable level conversion board provided by the present invention successfully simplifies the complexity of PCB design, avoids the complex voltage regulation and matching steps in the traditional scheme through innovative design, reduces the design workload and potential design errors; secondly, the present invention optimizes the level conversion logic, realizes seamless adaptation under different level conditions, greatly shortens the test cycle, and improves the overall efficiency of system debugging. More importantly, this innovative design not only directly improves the overall performance and stability of the circuit system, but also provides strong technical support for the rapid development and iterative upgrade of subsequent products, laying a solid foundation. Description of the Drawings
[0012] Figure 1 It is a schematic diagram of the PCB design of the pluggable level conversion board provided by the present invention.
[0013] Figure 2 It is a schematic diagram of the hardware connection structure provided by the present invention.
[0014] Figure 3 It is a schematic diagram of the forward insertion structure of the pluggable level conversion board provided by the present invention.
[0015] Figure 4It is a schematic diagram of the reverse insertion structure of the pluggable level conversion board provided by the present invention. Detailed implementation mode
[0016] The following further elaborates on a bidirectional power supply pluggable level conversion board proposed by the present invention in conjunction with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present invention will be clearer. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise scales, only for the purpose of conveniently and clearly assisting in explaining the embodiments of the present invention.
[0017] The present invention provides a bidirectional power supply pluggable level conversion board, which realizes the wide voltage range of the ADC and the level matching of the acquisition system through the design of a slot adapter board + a pluggable level conversion board. The core lies in arranging two level conversion chips (the power supply voltage relationship is VCCA < VCCB) on a single PCB component in a symmetric and optimized manner, and naming this component as board P, as Figure 1 shown; in order to connect board P to the ADC and the acquisition system, another slot adapter board is designed and named as board M. In this design, the digital output port of the analog-to-digital converter (ADC) chip is defined as port A, and the receiving port of the acquisition system connected to the slot adapter board is defined as port B. The schematic diagram of the hardware connection is as Figure 2 shown. There are two level conversion chips on board P, which support 16-channel data level conversion at the same time; if more channels of data level conversion are required, multiple boards P can be inserted on board M at the same time or more channels of level conversion chips can be replaced on board P.
[0018] The present invention introduces a voltage comparison mechanism: when the voltage value of port A is lower than that of port B, board P is designed to be inserted into the circuit system in a forward (or standard) manner, that is, the Pin1 foot of board P is close to the side of port A, as Figure 3 shown; on the contrary, if the voltage value of port A is higher than that of port B, board P needs to be inserted in a reverse manner (rotated 180°), that is, the Pin1 foot of board P is close to the side of port B, as Figure 4 shown.
[0019] The present invention can not only effectively solve the problem of level mismatch between the ADC and the data acquisition system, but also be widely applicable to the situation of level mismatch existing between various system interfaces.
[0020] In ADC (Analog-to-Digital Converter) and data acquisition systems involving voltage mismatches, as well as other similar application scenarios with level mismatches, traditional design solutions exhibit significant voltage mismatch problems when faced with bidirectional conversion devices where VCCA (Digital Voltage A) must be less than VCCB (Digital Voltage B), especially in application scenarios where the ADC has an adjustable voltage range. Such mismatches can not only cause signal distortion during transmission, leading to a decline in overall performance, but in extreme cases, may also result in circuit damage, seriously affecting the reliability and stability of the system. The present invention proposes an innovative PCB (Printed Circuit Board) design solution that achieves dynamic voltage adjustment and precise matching by ingeniously introducing a level comparison mechanism and combining it with the symmetry principle of PCB design. Regardless of how the voltage magnitude relationship between VCCA and VCCB changes, this solution can ensure the stable operation of the circuit, thus greatly enhancing the compatibility between the ADC and the acquisition system. This innovative design not only solves the technical challenges brought about by voltage mismatches but also provides a new solution for similar application scenarios, promoting the further development of related technologies.
[0021] The above description is only a description of the preferred embodiments of the present invention and does not limit the scope of the present invention in any way. Any changes and modifications made by those of ordinary skill in the art of the present invention based on the above disclosure shall fall within the scope of protection of the claims.
Claims
1. A bidirectional power supply pluggable level conversion board, characterized in that: Including several level conversion chips; The plurality of level conversion chips are arranged on a single PCB component in a symmetrical and optimized manner, and together constitute a pluggable level conversion board.
2. The bidirectional power supply pluggable level conversion board according to claim 1, characterized in that: The pluggable level conversion board is plugged into the slot adapter board, and the analog-to-digital converter is connected to the acquisition system through the slot adapter board.
3. The bidirectional power supply pluggable level conversion board as claimed in claim 2, characterized in that: The digital output port of the analog-to-digital converter is defined as port A, and the receiving port of the acquisition system is defined as port B; When the voltage value of port A is lower than that of port B, the pluggable level conversion board is inserted into the slot adapter board in a forward manner; when the voltage value of port A is higher than that of port B, the pluggable level conversion board is inserted into the slot adapter board in a reverse manner; wherein the forward manner is: the Pin1 foot of the pluggable level conversion board is close to the port A side, and the reverse manner is: the Pin1 foot of the pluggable level conversion board is close to the port B side.
4. The bidirectional power supply pluggable level conversion board as claimed in claim 3, characterized in that: A plurality of pluggable level conversion boards are inserted into the slot adapter board, or a plurality of level conversion chips are arranged on the pluggable level conversion board to realize more data level conversion.