Analog signal acquisition testing device capable of automatically switching and controlling multipath loads
The analog signal acquisition and testing device, which uses relay cascading, solves the problem of manually changing the load in analog signal testing, realizes automated load switching, improves testing efficiency and reliability, and reduces costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-26
- Publication Date
- 2026-03-31
AI Technical Summary
Existing analog signal testing methods require manually changing different loads one by one, resulting in long testing times and low efficiency, which cannot meet the needs of mass production of integrated circuits.
An analog signal acquisition and testing device for automatically switching and controlling multiple loads is designed by using a relay cascade connection method and controlling the power supply of the relays.
It enables automated testing under different loads, improves testing efficiency, reduces labor costs, increases automation, reduces hardware costs, and enhances the flexibility and reliability of testing.
Smart Images
Figure CN224066940U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of integrated circuit testing, specifically relating to an analog signal acquisition and testing device that automatically switches and controls multiple loads. Background Technology
[0002] With the rapid development of integrated circuit technology and the increasing complexity of products, the requirements for testing technology are becoming increasingly stringent. Currently, comprehensive production testing of integrated circuit products has become a crucial link in ensuring product reliability. A diverse range of automated testing systems, testers, test boards, and oscilloscopes have emerged in the market. These tools collectively constitute the technical support system for integrated circuit testing, capable of meeting the basic needs of current production testing. Through highly integrated hardware and software collaboration, they achieve accurate measurement and evaluation of various indicators of integrated circuits, providing strong support for the mass production of integrated circuits.
[0003] Existing automated testing technologies mainly target digital signal testing. Automated testing of analog signals primarily targets analog-to-digital converters (AD) and digital-to-analog converters (DA). Other differential analog signal testing mainly uses oscilloscopes for observation. If the analog end of the circuit under test needs to test different parameters under different loads, existing methods can only manually change the load one by one and test them one by one. They cannot achieve the function of automatically switching between different loads. The method of manually testing analog signals under different loads has the problems of long testing time and low efficiency, which cannot meet the testing requirements of integrated circuit mass production. Utility Model Content
[0004] To address the issue of manually observing multiple analog signals one by one on an oscilloscope, this invention provides an analog signal acquisition and testing device that automatically switches and controls multiple loads. This device automates the switching of tests under different loads, effectively improving the efficiency of batch production circuit testing, reducing labor costs, and enabling automated testing of integrated circuit products.
[0005] To achieve the above objectives, this utility model provides the following technical solution: an analog signal acquisition and testing device for automatic switching control of multiple loads, comprising N loads, N≥1, wherein the first connection terminal of the Nth load is connected to the positive terminal of the analog terminal through a first relay, and the second connection terminal of the Nth load is connected to the negative terminal of the analog terminal through a second relay; the N first relays are cascaded together, and the N second relays are cascaded together; automatic switching of loads is achieved by controlling the power supply of the first and second relays.
[0006] Furthermore, the first connection terminal of each load is connected to the positive terminal of the analog terminal through the long closed-point output terminal of the first relay.
[0007] Furthermore, the second connection terminal of each load is connected to the negative terminal of the analog terminal through the long closed-point output terminal of the second relay.
[0008] Furthermore, the continuously open output terminal of the preceding first relay is connected to the continuously closed input terminal of the following first relay to form a cascaded connection.
[0009] Furthermore, the continuously open output terminal of the preceding second relay is connected to the continuously closed input terminal of the following second relay to form a cascaded connection.
[0010] Furthermore, the first and second relays are model ATQ209.
[0011] Furthermore, if the first N-1 first relays and second relays are all energized, then the Nth load is connected.
[0012] Furthermore, both the first relay and the second relay are connected to the testing machine.
[0013] This utility model also provides an LHB2579 transceiver transformer circuit, which adds the above-mentioned analog signal acquisition and testing device for automatically switching and controlling multiple loads to the test board of the LHB2579 circuit automated test machine.
[0014] Furthermore, the number of the first and second relays in the analog signal acquisition and testing circuit is determined based on the number of analog signal output terminals of the LHB2579 circuit and the number of load types to be tested.
[0015] Compared with the prior art, the present invention has at least the following beneficial effects:
[0016] This utility model provides an analog signal acquisition and testing device for automatic switching control of multiple loads. By switching the relays on and off, different loads can be automatically switched as needed to achieve comprehensive testing of multiple relays, which improves the flexibility of testing and solves the problem of manually observing each analog signal on an oscilloscope one by one in the original technology. This greatly improves testing efficiency, reduces labor costs, and increases the degree of automation.
[0017] In the analog signal acquisition and testing device for automatic switching control of multiple loads provided by this utility model, multiple relays are connected in a cascade manner, which can effectively reduce the number of relays required and reduce hardware costs. Moreover, the power supply control of the relays is provided by a dedicated testing machine, which improves the reliability and stability of the test.
[0018] This utility model provides an analog signal acquisition and testing device for automatically switching and controlling multiple loads. It has been applied and verified in the production testing of the LHB2579 circuit, realizing the measurement of LHB2579 circuit power consumption and amplitude V. PP Output waveform distortion, overshoot, and disturbance V D Output symmetry V R Threshold voltage response V THD Threshold voltage does not respond V THND The automatic switching of parameters on the hybrid automated test platform solves the problem that each test item previously required manual observation on an oscilloscope, thus rapidly improving the testing efficiency of the LHB2579 circuit. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the relay array connection in this utility model;
[0020] Figure 2 This is a connection diagram in an embodiment of the present utility model;
[0021] Figure 3 This is a structural diagram of the machine test board in an embodiment of this utility model;
[0022] Figure 4 This document compares the testing procedures for the LHB2579 circuit in various embodiments of this utility model. Detailed Implementation
[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0024] Based on the requirement that current devices under test (DUTs) need to test different analog parameters at the output network load for different analog signals, this invention provides an analog signal acquisition and testing device that automatically switches and controls multiple loads. It employs multiple cascaded relays, and the power supply to different relays is controlled by the testing equipment to automatically connect different network loads. This allows for the testing of analog signal characteristics under different output network loads on automated testing equipment. The specific structure is as follows:
[0025] 1. Utilizing the opening and closing characteristics of a relay, the relay is powered to control the opening and closing of its contacts, such as... Figure 1 The relay array shown consists of 8 relays (this method can be further expanded), divided into two groups. K_A0, K_A1, K_A2, and K_A3 form the first group of relays, and K_B0, K_B1, K_B2, and K_B3 form the second group of relays. The output terminals of the continuously closed contacts of each relay in one group are connected to one end of their respective load terminals. Similarly, the output terminals of the continuously closed contacts of the other group of relays are connected to the other ends of their respective load terminals. The number of relays connected varies depending on the number of loads. For example... Figure 1 For four types of loads, two sets of 8 relays are needed; for 5 types of loads, two sets of 10 relays are needed, and so on.
[0026] 2. The two sets of relays are connected in a cascaded manner, such as... Figure 1 As shown, the continuously open output terminal of relay K_A0 is connected to the continuously closed input terminal of relay K_A1; the continuously open output terminal of relay K_A1 is connected to the continuously closed input terminal of relay K_A2; the continuously open output terminal of relay K_A2 is connected to the continuously closed input terminal of relay K_A3; the continuously open output terminal of relay K_B0 is connected to the continuously closed input terminal of relay K_B1; the continuously open output terminal of relay K_B1 is connected to the continuously closed input terminal of relay K_B2; and the continuously open output terminal of relay K_B2 is connected to the continuously closed input terminal of relay K_B3.
[0027] 3. By separately controlling the power supply of two sets of relays, the goal is to ensure that only one type of load is connected at any given time, while other loads are not connected. Figure 1 As shown, when all relays are not powered, load 1 is connected, and loads 2, 3, and 4 are disconnected. When relays K_A0 and K_B0 are powered, load 2 is connected, and loads 1, 3, and 4 are disconnected. When relays K_A0, K_B0, K_A1, and K_B1 are powered simultaneously, load 3 is connected, and loads 1, 2, and 4 are disconnected. When relays K_A0, K_B0, K_A1, K_B1, K_A2, and K_B2 are powered simultaneously, load 4 is connected, and loads 1, 2, and 3 are disconnected.
[0028] 4. An automatic switching method for analog signal acquisition testing of multiple loads using the above test structure, including:
[0029] Step 1: Determine the number of relays required based on the number of analog signal output terminals of the circuit under test and the number of load types to be tested.
[0030] Step 2: Divide the required relays into two groups, with an equal number of relays in each group. Connect the long-closed output terminal of each group of relays to one or the other end of the corresponding load terminal. The two groups of relays are connected in a cascade manner. For example, connect the long-open output terminal of the first group of relays to the long-closed input terminal of the second group of relays, connect the long-open output terminal of the second group of relays to the long-closed input terminal of the third group of relays, and so on.
[0031] Step 3: Control the power supply of the two sets of relays separately to ensure that only one type of load is connected at any given time, while other loads are not connected. The specific power supply control of the relays is provided by a dedicated testing machine.
[0032] This invention can automatically switch different loads as needed to achieve comprehensive testing of multiple relays, improving testing flexibility. By using relay cascading, the number of relays required can be effectively reduced, lowering hardware costs. The power supply control for the relays is provided by a dedicated testing machine, improving testing reliability and stability. It solves the problem of manually observing each analog signal on an oscilloscope one by one in the original technology, greatly improving testing efficiency, reducing labor costs, and increasing automation.
[0033] The analog signal acquisition and testing circuit with automatic switching control of multiple loads provided by this invention has been applied in the LHB2579 circuit. The following examples illustrate the practical application of this invention:
[0034] The specific operating steps of the analog signal acquisition and test circuit with automatic switching control for multiple loads applied to the transformer circuit of the LHB2579 transceiver are as follows:
[0035] Step 1: Add 8 relays (ATQ209 model) to the test board of the LHB2579 circuit automated testing machine. Each relay has two click switches. This increases the power consumption load and amplitude V of the LHB2579 circuit. PP Load, output waveform distortion overshoot and disturbance V D Load and output symmetry V R Load output symmetry V R Load, threshold voltage response V THD Load and threshold voltage do not respond V THND See the load and logical connection diagram. Figure 2 ;
[0036] Step 2: Connect the analog terminals BUSA+, BUSA-, BUSB+, and BUSB- of the LHB2579 circuit according to... Figure 2 The connections are made, where R1 and R2 are power-consuming loads, and the resistor network of R3, R4, R5, and R6 is the amplitude V. PP Output waveform distortion, overshoot, and disturbance V D and output symmetry V R The common equivalent load of the three parameters, with resistors R7, R8, R9, and R10 as the threshold voltage response V. THD The equivalent load network with parameters R11, R12, R13, and R14 resistors is a threshold voltage that does not respond to V. THND Parameter equivalent load network;
[0037] Step 3 Figure 3 This is a structural diagram of the LHB2579 circuit test board used in an analog automated test platform, where the eight relays are U1~U8. Figure 2During the testing phase, when testing the power consumption of channels A and B, the testing equipment was programmed to control the power supply path, ensuring that U1~U8 were not supplied with power. Figure 3 The two Z0s serve as power loads for paths A and B, respectively, and together with U1 and U5, they form a test path to complete the power consumption test.
[0038] Step 4: Similarly, test the amplitude V. PP Output waveform distortion, overshoot, and disturbance V D and output symmetry V R When there are three parameters, the test machine controls the power supply path to supply power to relays U1 and U5 respectively, and through U1, U2, and the load (V) PP V D V R U6 and U5 form a test path to complete V. PP V D V R Three parameters were measured;
[0039] Step 5: Similarly, test the threshold voltage response V. THD During parameter setting, the test machine controls the power supply path, supplying power to relays U1, U2, U5, and U6 respectively, and then connecting them to U1, U2, U3, and the load (V). THD U7, U6, and U5 form a test path to complete V. THD Parameter measurement;
[0040] Step 6, Similarly, test the threshold voltage V. THND During parameter setting, the test machine controls the power supply path, supplying power to relays U1, U2, U3, U6, and U5 respectively, and then connecting them to U1, U2, U3, U4, and the load (V). THND Powered by U8, U7, U6, and U5, it can complete V THND Parameter measurement;
[0041] The above examples have been tested and verified and applied in the production testing of LHB2579 circuits, such as... Figure 4 The diagram shows a comparison of the LHB2579 circuit testing process. Based on the LHB2579 circuit testing results, the original testing method required 4 minutes to fully test one circuit, while the automated testing machine only takes 1 minute, significantly reducing testing time. Furthermore, the machine's test data is easier to analyze, allowing designers to better control the overall condition of the batch of circuits. This method will be gradually applied to the production testing of other 1553 series circuits, further reducing labor and time costs.
[0042] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0043] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for illustrating the technical concept of this utility model and should not be used to limit the scope of protection of this utility model. Any modifications made to the technical solutions based on the technical concept proposed by this utility model shall fall within the scope of protection of the claims of this utility model.
Claims
1. An analog signal acquisition and testing device for automatically switching and controlling multiple loads, characterized in that, The N loads are connected with the positive terminal of the analog terminal through the long-closed point output of the first relay, and the N loads are connected with the negative terminal of the analog terminal through the long-closed point output of the second relay.
2. The analog signal acquisition test device of claim 1, wherein, The first connection end of each load is connected with the positive terminal of the analog terminal through the long-closed point output of the first relay.
3. The analog signal acquisition test device of claim 1, wherein, The second connection end of each load is connected with the negative terminal of the analog terminal through the long-closed point output of the second relay.
4. The analog signal acquisition test device of claim 1, wherein, The long-open point output of the first relay is connected with the long-closed point input of the second relay to form a cascade connection.
5. The analog signal acquisition test device of claim 1, wherein, The long-open point output of the first relay is connected with the long-closed point input of the second relay to form a cascade connection.
6. The analog signal acquisition test device of claim 1, wherein, The first relay and the second relay are ATQ209.
7. The analog signal acquisition test device of claim 1, wherein, The first N-1 first relays and the second relays are powered, and the N load is connected.
8. The analog signal acquisition test device of claim 1, wherein, The first relay and the second relay are connected with the test machine.
9. A transceiver transformer circuit of the LHB2579 type, characterized in that An automatic switching control multi-load analog signal acquisition test device is added to the LHB2579 circuit automatic test machine.
10. A LHB2579 transceiver transformer circuit according to claim 9, characterized in that The number of the first relay and the second relay in the analog signal acquisition test circuit is determined according to the number of the analog signal output of the LHB2579 circuit and the number of the load to be tested.