CN203661016U

CN203661016U - FPGA-based signal generator

Info

Publication number: CN203661016U
Application number: CN201420029853.3U
Authority: CN
Inventors: 韩丹丹; 杨慧晶
Original assignee: Harbin University of Science and Technology
Current assignee: Harbin University of Science and Technology
Priority date: 2014-01-17
Filing date: 2014-01-17
Publication date: 2014-06-18
Anticipated expiration: 2024-01-17

Abstract

The utility model relates to an FPGA-based signal generator. Since a communication system relates to a plurality of types of detection datum, television image datum, voice datum, control command datum and the like, interface formats and hardware interface classifications vary greatly. An auxiliary adjusting capable of being applied to multiple kinds of adjustment work is required. The FPGA-based signal generator is composed of a signal producing module (1), a signal control module (2) and a D/A converter (3) connected together successively. The D/A converter is connected with the signal output module (4). The signal producing module includes a counter (5) and a storage (6). The counter is connected with a group of FPGA wave-shape modules (7). The signal control module is a 1-of-8 data selector provided with a top-layer circuit. The signal output module includes a filter (8) and an oscilloscope (9) connected with the filter (8). The utility model provides the FPGA-based signal generator.

Description

Based on the signal generator of FPGA

technical field:

the utility model relates to a kind of signal generator based on FPGA.

background technology:

along with the high speed development of EDA technology, there is deep variation in electronic system design technology and instrument, and the appearance of scale programmable logic device FPGA brings many convenience to designer.While carrying out signal authentication, need to take equipment to scene, use original signal to debug, waste a lot of time and efforts.In addition, original signal source is such as radar etc. is due to residing complicated condition, and communication system is subject to the restriction of temperature, humidity, volume, and a lot of signal commissioning devices are also restricted.

the polytypes such as detection data, television image data, speech data and the control command data relating to due to communication system, interface format is various, hardware interface kind difference is large, but uses monolithic processor controlled signal authentication device to have a lot of idle interfaces, causes device fabrication cost high.

summary of the invention:

the purpose of this utility model is to provide a kind of signal generator based on FPGA.

above-mentioned object realizes by following technical scheme:

a kind of signal generator based on FPGA, its composition comprises: signal generator module, described signal generator module connects signal controlling module, and described signal controlling module connects D/A converter, and described D/A converter connects signal output module; Described signal generator module comprises counter and memory, and described counter connects one group of FPGA waveform module; Described signal controlling module is 8 to select 1 data selector, and described 8 select 1 data selector to have top layer circuit; The oscilloscope that described signal output module comprises filter and is connected with described filter.

the described signal generator based on FPGA, described FPGA waveform module comprise increase progressively oblique wave module, the oblique wave module of successively decreasing, square wave module, triangular wave module, sine wave module and staircase waveform module.

the described signal generator based on FPGA, described increases progressively oblique wave module, the oblique wave module of successively decreasing, square wave module, triangular wave module, sine wave module and staircase waveform module also comprise respectively counter, clock circuit and reset circuit.

the beneficial effects of the utility model:

1. the utility model is provided with the signal generator module of six kinds of FPGA digital circuit board forms, and signal generator module utilizes its counter to produce the storage address of six kinds of waveforms, deposits logarithmic output signal certificate in memory.

2. the signal generator module of six kinds of FPGA digital circuit board forms of the utility model design is to replace single-chip microcomputer with FPGA digital circuit board, there is the circuit complexity of reduction, the change degree of circuit is improved, reduce greatly circuit design time and contingent mistake, reduced the development cost of circuit.

3. signal generator module, signal controlling module and the D/A converter of the utility model design form intruding detection system, and structure novel is simple, economic and practical.

brief description of the drawings:

accompanying drawing 1 is structural principle schematic diagram of the present utility model.

accompanying drawing 2 is schematic diagrams of the top layer circuit that relates to of the utility model.

accompanying drawing 3 is connecting circuit figure of the D/A converter that relates to of the utility model.

embodiment:

embodiment 1:

based on a signal generator of FPGA, its composition comprises: signal generator module 1, and described signal generator module connects signal controlling module 2, and described signal controlling module connects D/A converter 3, and described D/A converter connects signal output module 4; Described signal generator module comprises counter 5 and memory 6, and described counter connects one group of FPGA waveform module 7; Described signal controlling module is 8 to select 1 data selector, and described 8 select 1 data selector to have top layer circuit; The oscilloscope 9 that described signal output module comprises filter 8 and is connected with described filter.

embodiment 2:

according to the signal generator based on FPGA described in embodiment 1, described FPGA waveform module comprise increase progressively oblique wave module 10, the oblique wave module 11 of successively decreasing, square wave module 12, triangular wave module 13, sine wave module 14 and staircase waveform module 15.

embodiment 3:

according to the signal generator based on FPGA described in embodiment 2, described increase progressively oblique wave module, the oblique wave module of successively decreasing, square wave module, triangular wave module, sine wave module and staircase waveform module also comprise respectively counter 16, clock circuit 17 and reset circuit 18.

Claims

1. the signal generator based on FPGA, its composition comprises: signal generator module, it is characterized in that: described signal generator module connects signal controlling module, described signal controlling module connects D/A converter, and described D/A converter connects signal output module; Described signal generator module comprises counter and memory, and described counter connects one group of FPGA waveform module; Described signal controlling module is 8 to select 1 data selector, and described 8 select 1 data selector to have top layer circuit; The oscilloscope that described signal output module comprises filter and is connected with described filter.

2. the signal generator based on FPGA according to claim 1, is characterized in that: described FPGA waveform module comprise increase progressively oblique wave module, the oblique wave module of successively decreasing, square wave module, triangular wave module, sine wave module and staircase waveform module.

3. the signal generator based on FPGA according to claim 2, is characterized in that: described increase progressively oblique wave module, the oblique wave module of successively decreasing, square wave module, triangular wave module, sine wave module and staircase waveform module also comprise respectively counter, clock circuit and reset circuit.