A multi-channel adjustable signal generator

Abstract

The utility model discloses a kind of multi-channel adjustable signal generators, including input-output interface, with target system connection, signal output to target system is generated by signal generator, and signal generated by target system is returned to signal generator;Power module, power supply for each module in signal generator;Interactive module, display interface is provided for user, receives the instruction input by user;Control module, using FPGA, user instruction is collected, frequency signal is generated according to user instruction;Extension frequency generation module, the frequency signal that control module cannot generate is supplemented;Adjustment module, voltage and waveform modulation are carried out to the frequency signal output by control module or extension frequency generation module, input-output interface is sent into. With the characteristics of low price, strong driving ability, multiple output channels.

Description

Technical Field

[0001] This utility model relates to the field of signal modulation, and in particular to a multi-channel adjustable signal generator. Background Technology

[0002] A signal generator, also known as a signal source, is a device capable of outputting electrical signals of arbitrary waveforms, frequencies, and levels. Signal generators play a wide role in chip manufacturing and testing. In laboratories and outdoors, it is sometimes necessary to temporarily add an additional signal source to drive circuits. However, general-purpose signal generators are not only expensive and have low drive current, but also have few corresponding drive signal lines, which cannot meet the user's needs in specific situations. Utility Model Content

[0003] The technical problem solved by this utility model is that existing signal generators are expensive, have few output channels, and have poor single-channel output capability. This utility model provides a multi-channel adjustable signal generator.

[0004] The technical solution of this utility model is: a multi-channel adjustable signal generator, including: an input / output interface, a power supply module, a control module, an adjustment module, and a frequency feedback module;

[0005] The input / output interface connects to the target system, as well as to the adjustment module and the frequency feedback module. It outputs the signal input from the adjustment module to the target system and returns the signal generated by the target system to the frequency feedback module. The frequency feedback module connects to the control module, receives and detects the frequency of the signal output by the target system, and displays the frequency on the display interface of the interactive module through the control module.

[0006] The power supply module is connected to each module and supplies power to each module in the signal generator.

[0007] The interaction module connects to the control module, provides a display interface for the user, and receives user input commands.

[0008] The control module is connected to the adjustment module, frequency feedback module, interaction module, and extended frequency generation module. The control module is implemented using FPGA, collects user commands, generates frequency signals according to user commands, and inputs them to the adjustment module.

[0009] An extended frequency generation module is connected to the adjustment module; it supplements the frequency signals that the control module cannot generate, and generates extended frequency signals that are input to the adjustment module.

[0010] The adjustment module modulates the frequency signal output by the control module or the extended frequency generation module with voltage and waveform, and sends it to the input / output interface.

[0011] Furthermore, the input / output interfaces use SMA connectors for signal input and output.

[0012] Furthermore, the power module input is a 12V DC power supply, and the output is 12V, 5V, 3.3V, 2.5V, and 1.8V.

[0013] Furthermore, the interaction module includes an LED display and a keyboard, both of which are connected to the control module; the keyboard is used by the user to input commands, including target frequency, target voltage, and target waveform.

[0014] Furthermore, an extended frequency generation module is included, comprising a crystal oscillator and an FPGA. The crystal oscillator is selected from 50MHz, 40MHz, and 30MHz and is connected to the FPGA. The frequencies generated by the frequency multiplier include 25MHz, 20MHz, 15MHz, 12.5MHz, 10MHz, 7.5MHz, 6.25MHz, 5MHz, 3.75MHz, 100MHz, 80MHz, 60MHz, 200MHz, 160MHz, and 120MHz.

[0015] Furthermore, the adjustment module includes a voltage selector and a waveform selector. The voltage selector is connected to the control module and the extended frequency generation module, and distributes voltage to the input frequency signal according to the user's instructions. The waveform selector is connected to the voltage selector, and performs waveform selection on the signal output by the voltage selector to obtain the required waveform. Finally, it outputs a signal that meets the target frequency, target voltage and target waveform.

[0016] Furthermore, the selector can be configured with voltages of 12V, 5V, 3.3V, 2.5V, and 1.8V.

[0017] Furthermore, the waveform selector can select from square waves, sine waves, sawtooth waves, and triangle waves.

[0018] Furthermore, the voltage selector uses an electronic switch IPS4140HQ.

[0019] Furthermore, the control module adopts the XCV300.

[0020] The advantages of this utility model compared with the prior art are as follows:

[0021] (1) The signal generator proposed in this scheme has a large number of output channels. After being amplified by a frequency follower, it can meet the user's requirements for multiple channels and low drive.

[0022] (2) The main components of this solution are the XCV300 control module and the IPS4140HQ electronic switch. The overall price is controllable, with a cost of less than 1,000 yuan.

[0023] (3) Compared with direct drive of IO pins, this solution has a stronger driving capability of frequency follower. A high-speed gate driver can also be added after the frequency follower to further increase the driving capability. Attached Figure Description

[0024] Figure 1 This is a diagram of the multi-channel adjustable signal generator of this utility model. Detailed Implementation

[0025] To better understand the technical solution of this utility model, the specific embodiments of this utility model are described below.

[0026] Provide a multi-channel adjustable signal generator, such as Figure 1 As shown, the multi-channel adjustable signal generator includes:

[0027] Includes: input / output interface, power supply module, interaction module, control module, extended frequency generation module, adjustment module, and frequency feedback module;

[0028] The input / output interface connects to the target system, as well as to the adjustment module and the frequency feedback module. It outputs the signal input from the adjustment module to the target system and returns the signal generated by the target system to the frequency feedback module. The frequency feedback module connects to the control module, receives and detects the frequency of the signal output by the target system, and displays the frequency on the display interface of the interactive module through the control module.

[0029] The power supply module is connected to each module and supplies power to each module in the signal generator.

[0030] The interaction module connects to the control module, provides a display interface for the user, and receives user input commands.

[0031] The control module is connected to the adjustment module, frequency feedback module, interaction module, and extended frequency generation module. The control module is implemented using FPGA, collects user commands, generates frequency signals according to user commands, and inputs them to the adjustment module.

[0032] An extended frequency generation module is connected to the adjustment module; a phase-locked loop is used to supplement the frequency signals that the control module cannot generate, and an extended frequency signal is generated and input to the adjustment module.

[0033] The adjustment module uses the FPGA output adjustment signal to activate the electronic switch, allowing selection of frequency, voltage, and waveform. Subsequently, a high-speed electronic switch modulates the frequency signal output from the control module or extended frequency generation module, and the modulated signal is sent to the output interface, which uses an SMA connector.

[0034] The output interface uses SMA for signal output.

[0035] The power module takes a 12VDC input and outputs five conventional voltages—12V, 5V, 3.3V, 2.5V, and 1.8V—through rectification, filtering, and DC / DC conversion. The high-speed electronic switch control terminal is connected to the FPGA's I / O port, allowing the high-speed electronic switch to output square wave signals of different voltages.

[0036] The interactive module uses an LED display and six keys (up, down, left, right, confirm, cancel) for inputting the target frequency, target voltage, and target waveform.

[0037] The control module is used to acquire user commands and generate frequency signals. The controller module uses an FPGA (XCV300-4PQ240I) as the controller for control and signal generation and acquisition, and includes various peripheral circuits, memory, and a watchdog timer. FPGA as a controller has significant advantages such as short design cycle, parallel data processing capability, reprogrammable and rewritable operation, and faster processing speed and frequency, which can greatly improve the system's response accuracy and speed.

[0038] The extended frequency generation module, in combination with frequency multipliers using crystal oscillators ZPB-5CCH3-50MHz, ZPB-5CCH3-40MHz, and ZPB-5CCH3-30MHz, supplements the frequencies that the FPGA cannot output. It selects 50MHz, 40MHz, and 30MHz crystal oscillators to divide the frequencies to 25MHz, 20MHz, 15MHz, 12.5MHz, 10MHz, 7.5MHz, 6.25MHz, 5MHz, 3.75MHz, 100MHz, 80MHz, 60MHz, 200MHz, 160MHz, and 120MHz.

[0039] The adjustment module is used to distribute the frequency generated by the control module with corresponding voltages and waveforms. After the control module outputs the target frequency, the signal is voltage-distributed through a high-speed electronic switch (SN74LVC8T245PWR). After distributing the power supply output voltage, waveforms of five common voltages—12V, 5V, 3.3V, 2.5V, and 1.8V—can be obtained. A waveform selector can then be used to obtain square waves, triangle waves, sawtooth waves, and sine waves. The waveform selector uses an electronic switch to switch between voltage, frequency multiplication, or waveform paths, employing an RDD104+MSFS5 combination scheme.

[0040] It is understood that this utility model has been described through embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific circumstances without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are protected by this utility model.

[0041] The contents not described in detail in this utility model specification are common knowledge to those skilled in the art.

Claims

1. A multi-channel adjustable signal generator, characterized in that, include: Input / output interfaces, power supply module, control module, adjustment module, and frequency feedback module; The input / output interface connects to the target system, as well as to the adjustment module and the frequency feedback module. It outputs the signal input from the adjustment module to the target system and returns the signal generated by the target system to the frequency feedback module. The frequency feedback module connects to the control module, receives and detects the frequency of the signal output by the target system, and displays the frequency on the display interface of the interactive module through the control module. The power supply module is connected to each module and supplies power to each module in the signal generator. The interaction module connects to the control module, provides a display interface for the user, and receives user input commands. The control module is connected to the adjustment module, frequency feedback module, interaction module, and extended frequency generation module. The control module is implemented using FPGA, collects user commands, generates frequency signals according to user commands, and inputs them to the adjustment module. An extended frequency generation module is connected to the adjustment module; it supplements the frequency signals that the control module cannot generate, and generates extended frequency signals that are input to the adjustment module. The adjustment module modulates the frequency signal output by the control module or the extended frequency generation module with voltage and waveform, and sends it to the input / output interface.

2. The multi-channel adjustable signal generator according to claim 1, characterized in that: The input / output interface uses SMA connectors for signal input and output.

3. The multi-channel adjustable signal generator according to claim 1, characterized in that: The power module takes a 12V DC input and outputs 12V, 5V, 3.3V, 2.5V, and 1.8V.

4. The multi-channel adjustable signal generator according to claim 1, characterized in that: The interactive module includes an LED display and a keyboard, both of which are connected to the control module; the keyboard is used by the user to input commands, including target frequency, target voltage, and target waveform.

5. The multi-channel adjustable signal generator according to claim 1, characterized in that: The extended frequency generation module includes a crystal oscillator and an FPGA. The crystal oscillator is selected from 50MHz, 40MHz, and 30MHz and is connected to the FPGA. The frequencies generated by the frequency multiplier include 25MHz, 20MHz, 15MHz, 12.5MHz, 10MHz, 7.5MHz, 6.25MHz, 5MHz, 3.75MHz, 100MHz, 80MHz, 60MHz, 200MHz, 160MHz, and 120MHz.

6. The multi-channel adjustable signal generator according to claim 1, characterized in that: The adjustment module includes a voltage selector and a waveform selector. The voltage selector is connected to the control module and the extended frequency generation module. It distributes voltage to the input frequency signal according to the user's instructions. The waveform selector is connected to the voltage selector. It selects the waveform of the signal output by the voltage selector to obtain the required waveform. Finally, it outputs a signal that meets the target frequency, target voltage and target waveform.

7. The multi-channel adjustable signal generator according to claim 6, characterized in that: The selector can be set to 12V, 5V, 3.3V, 2.5V, or 1.8V.

8. The multi-channel adjustable signal generator according to claim 6, characterized in that: The waveform selector can select from square waves, sine waves, sawtooth waves, and triangle waves.

9. The multi-channel adjustable signal generator according to claim 6, characterized in that: The voltage selector uses an electronic switch IPS4140HQ.

10. The multi-channel adjustable signal generator according to claim 1, characterized in that: The control module used is XCV300.

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