Bidirectional power transfer digital attenuator and test system
By designing a bidirectional power transmission digitally controlled attenuator, and employing multiple digitally controlled attenuation modules and an LC filter network, the inconvenience of testing caused by unidirectional transmission in existing technologies is solved, achieving both convenience and security in automated testing.
Patent Information
- Application Number
- CN202423177643.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-23
AI Technical Summary
Existing digitally controlled attenuators can only achieve power signal transmission in one direction, which requires manual disassembly or separate testing of the receiving and transmitting performance during board-level circuit testing, increasing the difficulty and cost of automated production.
Design a bidirectional power transmission digitally controlled attenuator, which uses multiple identical digitally controlled attenuation modules and an LC filter network to achieve bidirectional power transmission, and is connected to a shielding module and a digital processing module to support the use of a comprehensive tester.
It enables automated testing without splitting the receiver and transmitter stations, avoiding damage caused by reverse wiring and improving the convenience and efficiency of testing.
Smart Images
Figure CN223599830U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to numerical control attenuator technical field, especially in two -way power transmission numerical control attenuator and test system. BACKGROUND
[0002] When facing the board level circuit test with receiving channel and transmitting channel, the conventional numerical control attenuator can only realize the power signal transmission of single direction, when needing to test the receiving and transmitting performance of product, the reverse direction test needs to take down the numerical control attenuator manually, or splits into 2 test workstations, one workstation tests the receiving performance, and the other workstation tests the transmitting performance, which is extremely inconvenient for automatic production test, and also greatly increases the cost. SUMMARY
[0003] The utility model discloses at least solve one of the technical problems in the prior art. To this end, the utility model provides a two -way power transmission numerical control attenuator and test system can realize two -way power transmission, improve the convenience of test.
[0004] In one aspect, the utility model embodiment provides a two -way power transmission numerical control attenuator, comprising:
[0005] Network interface and power supply module;
[0006] Digital processing module, with network interface and power supply module connection;
[0007] Shielding module, first end with digital processing module connection;
[0008] Multiple numerical control attenuation module, multiple numerical control attenuation module is connected with the second end of shielding module respectively, numerical control attenuation module has first input and output end and second input and output end, multiple numerical control attenuation module passes through first input and output end and second input and output end and connects gradually in proper order, and first input and output interface is connected to the first input and output end of the numerical control attenuation module of first stage, and second input and output interface is connected to the second input and output end of the numerical control attenuation module of last stage.
[0009] According to some embodiments of the utility model, the multiple numerical control attenuation module includes the first numerical control attenuation module, the second numerical control attenuation module and the third numerical control attenuation module, the first input and output end of the first numerical control attenuation module is connected to the first input and output interface, the second input and output end of the first numerical control attenuation module is connected with the first input and output end of the second numerical control attenuation module, the second input and output end of the second numerical control attenuation module is connected with the second input and output end of the third numerical control attenuation module, and the first input and output end of the third numerical control attenuation module is connected to the second input and output interface.
[0010] According to some embodiments of the present application, the plurality of digital control attenuation modules adopt integrated circuits of the same model.
[0011] According to some embodiments of the present application, the plurality of digital control attenuation modules all adopt integrated circuits of the model PE43704.
[0012] According to some embodiments of the present application, the power supply end of the digital control attenuation module is connected with a filter network.
[0013] According to some embodiments of the present application, the filter network adopts an LC filter network.
[0014] According to some embodiments of the present application, the LC filter network comprises a first filter capacitor and a first filter inductor, a first end of the first filter capacitor is connected with a first end of the first filter inductor and connected to the power supply end, a second end of the first filter capacitor is connected to the reference voltage end, and a second end of the first filter inductor is connected to the power supply end of the digital control attenuation module.
[0015] According to some embodiments of the present application, the LC filter network further comprises a second filter capacitor, a first end of the second filter capacitor is connected with the first end of the first filter inductor, and a second end of the second filter capacitor is connected to the reference voltage end.
[0016] On the other hand, the present application provides a test system comprising the bidirectional power transmission digital control attenuator.
[0017] According to some embodiments of the present application, the test system further comprises a comprehensive tester, and an output end of the comprehensive tester is connected with the bidirectional power transmission digital control attenuator.
[0018] The present application has at least the following advantages:
[0019] The digital control attenuation module has a first input / output end and a second input / output end, can realize bidirectional power transmission, does not need to split the receiving station and the transmitting station in the test process, and does not exist the situation of burning due to reverse wiring, which is beneficial to improve the convenience of test.
[0020] Additional aspects and advantages of the present application will be given in part in the following description, will become apparent from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS
[0021] The above and / or additional aspects and advantages of the present application will become apparent from and will be readily apparent to those skilled in the art based on the following description, including the appended claims, taken in conjunction with the accompanying drawings.
[0022] Figure 1The principle block diagram of the bidirectional power transmission digital controlled attenuator is shown in the embodiment of the utility model.
[0023] Figure 2 For Figure 1 The circuit principle diagram of the multiple digital controlled attenuation modules of the bidirectional power transmission digital controlled attenuator is shown in the embodiment of the utility model.
[0024] Figure 3 For Figure 1 The circuit principle diagram of the filter network of the bidirectional power transmission digital controlled attenuator is shown in the embodiment of the utility model.
[0025] Reference signs:
[0026] Network interface and power supply module 100, digital processing module 200, shielding module 300, first digital controlled attenuation module 410, second digital controlled attenuation module 420, third digital controlled attenuation module 430, first input and output interface 510, second input and output interface 520. DETAILED DESCRIPTION
[0027] The embodiments of the utility model are described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.
[0028] In the description of the utility model, the meaning of "several" is one or more, the meaning of "multiple" is two or more, greater than, less than, more than, etc. are understood as not including the number, "above", "below", "within", etc. are understood as including the number. If there is a description of "first", "second", etc. is only used to distinguish technical features for the purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.
[0029] In the description of the utility model, unless otherwise explicitly limited, the words "set", "install", "connect" and the like should be broadly understood, and the skilled in the art can reasonably determine the specific meaning of the above words in the utility model according to the specific content of the technical scheme.
[0030] The embodiment discloses a test system, including bidirectional power transmission digital controlled attenuator. Please refer to Figure 1The bidirectional power transmission digital control attenuator comprises a network interface and power supply module 100, a digital processing module 200, a shielding module 300 and a plurality of digital control attenuating modules. The digital processing module 200 is connected with the network interface and power supply module 100. The network interface and power supply module 100 is used for providing network communication and power supply functions. The first end of the shielding module 300 is connected with the digital processing module 200. The network interface and power supply module 100, the digital processing module 200 and the shielding module 300 can all adopt existing integrated modules or circuits. The plurality of digital control attenuating modules are respectively connected with the second end of the shielding module 300. The digital control attenuating module has a first input and output end and a second input and output end. The plurality of digital control attenuating modules are connected in cascade through the first input and output end and the second input and output end. The first input and output end of the first-stage digital control attenuating module is connected with a first input and output interface 510. The second input and output end of the last-stage digital control attenuating module is connected with a second input and output interface 520.
[0031] The digital control attenuating module has the first input and output end and the second input and output end, and can realize bidirectional power transmission. The first input and output interface 510 and the second input and output interface 520 do not need to distinguish input ports and output ports. In the test process, the receiving station and the transmitting station do not need to be split, and there is no situation of burning due to reverse wiring. This is beneficial to improve the convenience of the test.
[0032] Please continue to refer to Figure 1 and Figure 2 The plurality of digital control attenuating modules comprise a first digital control attenuating module 410, a second digital control attenuating module 420 and a third digital control attenuating module 430. The first input and output end (indicated by a mark RF1) of the first digital control attenuating module 410 is connected with the first input and output interface 510. The second input and output end of the first digital control attenuating module 410 is connected with the first input and output end of the second digital control attenuating module 420 (indicated by a mark RF2). The second input and output end of the second digital control attenuating module 420 is connected with the second input and output end of the third digital control attenuating module 430 (indicated by a mark RF3). The first input and output end of the third digital control attenuating module 430 is connected with the second input and output interface 520. In use, the first digital control attenuating module 410 and the third digital control attenuating module 430 perform zipper-type step output. When the attenuation value is greater than the maximum step value of the first digital control attenuating module 410 and the third digital control attenuating module 430, the step attenuation of the second digital control attenuating module 420 is enabled again, until the maximum output range is realized.
[0033] The plurality of digitally controlled attenuating modules adopt the same type of integrated circuit, which can simplify the complexity of circuit design and ensure the symmetry of the first-stage and last-stage attenuation performance. For example, the plurality of digitally controlled attenuating modules all adopt the integrated circuit of PE43704. The integrated circuit of PE43704 provides a maximum power handling of 28 dBm up to 8 GHz, covers a 31.75 dB attenuation range with a step of 0.25 dB, 0.5 dB or 1.0 dB, and provides a plurality of CMOS control interfaces and an optional VssEXT bypass mode to improve the spurious performance. The high attenuation accuracy can be maintained at the frequency and temperature, and very low insertion loss and low power consumption are exhibited.
[0034] The power supply end of the digitally controlled attenuating module is connected with a filter network, which can improve the stability of power supply. For example, refer to Figure 3 The filter network adopts an LC filter network, which has the advantages of small size, low cost, easy design and manufacture, and high quality factor, and can achieve effective filtering. For example, the LC filter network includes a first filter capacitor (indicated by a mark C58) and a first filter inductor (indicated by a mark L7), the first end of the first filter capacitor is connected to the first end of the first filter inductor and connected to the power supply end, and the second end of the first filter capacitor is connected to the reference voltage end. The second end of the first filter inductor is connected to the power supply end of the digitally controlled attenuating module. For another example, the LC filter network further includes a second filter capacitor (indicated by a mark C59), the first end of the second filter capacitor is connected to the first end of the first filter inductor, and the second end of the second filter capacitor is connected to the reference voltage end. The first digitally controlled attenuating module 410, the second digitally controlled attenuating module 420 and the third digitally controlled attenuating module 430 are all connected with the filter network, and the filter network can adopt the same circuit structure. The circuit structure of one of the filter networks is taken as an example for description in the embodiment.
[0035] The test system further includes a comprehensive tester, and the output end of the comprehensive tester is connected with the bidirectional power transmission digitally controlled attenuator. During the wiring process, the first input-output interface 510 and the second input-output interface 520 of the bidirectional power transmission digitally controlled attenuator can be used as input interfaces and output interfaces, and the situation that the digitally controlled attenuator is burned due to reverse wiring does not occur. The test does not need to be divided into a receiving work station and a transmitting work station, which is beneficial to improve the convenience of the test.
[0036] The embodiments of the utility model are described in detail above combined with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range possessed by the ordinary skilled in the art without departing from the purpose of the utility model.
Claims
1. A bi-directional power transfer digitally controlled attenuator, characterized by, include: Network interface and power supply module; A digital processing module is connected to the network interface and the power supply module; The shielding module has its first end connected to the digital processing module. Multiple numerically controlled attenuation modules are provided, each connected to the second end of the shielding module. Each numerically controlled attenuation module has a first input / output terminal and a second input / output terminal. The multiple numerically controlled attenuation modules are cascaded sequentially through the first input / output terminal and the second input / output terminal. The first input / output terminal of the first-stage numerically controlled attenuation module is connected to a first input / output interface, and the second input / output terminal of the last-stage numerically controlled attenuation module is connected to a second input / output interface.
2. The bidirectional power transfer digital attenuator of claim 1, wherein, The plurality of numerically controlled attenuation modules include a first numerically controlled attenuation module, a second numerically controlled attenuation module, and a third numerically controlled attenuation module. The first input / output terminal of the first numerically controlled attenuation module is connected to the first input / output interface. The second input / output terminal of the first numerically controlled attenuation module is connected to the first input / output terminal of the second numerically controlled attenuation module. The second input / output terminal of the second numerically controlled attenuation module is connected to the second input / output terminal of the third numerically controlled attenuation module. The first input / output terminal of the third numerically controlled attenuation module is connected to the second input / output interface.
3. Bidirectional power transfer digital attenuator according to claim 1 or 2, characterized in that, The multiple numerically controlled attenuation modules use integrated circuits of the same model.
4. The bidirectional power transfer digital attenuator of claim 3, wherein, All of the numerically controlled attenuation modules use an integrated circuit of model PE43704.
5. The bidirectional power transfer digital attenuator of claim 1, 2, or 4, wherein, The power supply terminal of the numerically controlled attenuation module is connected to a filter network.
6. The bidirectional power transfer digital attenuator of claim 5, wherein, The filtering network used is an LC filtering network.
7. The bidirectional power transfer digital attenuator of claim 6, wherein, The LC filter network includes a first filter capacitor and a first filter inductor. The first end of the first filter capacitor is connected to the first end of the first filter inductor and is connected to the power supply terminal. The second end of the first filter capacitor is connected to the reference voltage terminal. The second end of the first filter inductor is connected to the power supply terminal of the numerically controlled attenuation module.
8. The bidirectional power transfer digital attenuator of claim 7, wherein, The LC filter network further includes a second filter capacitor, the first end of which is connected to the first end of the first filter inductor, and the second end of which is connected to the reference voltage terminal.
9. A test system, characterized by Includes the bidirectional power transmission digitally controlled attenuator as described in any one of claims 1 to 8.
10. The test system of claim 9, wherein, The testing system also includes a comprehensive tester, the output of which is connected to the bidirectional power transmission digitally controlled attenuator.