CN206161701U - PCM signal generating device - Google Patents

Abstract

The utility model discloses a PCM signal generating device, including host computer, FPGA host system, USB communication interface module, output interface module and power module, power module links to each other, is used for to provide required power with FPGA host system and USB communication interface module respectively, the USB communication interface module respectively with host computer and FPGA host system link to each other, are used for receiving host machine's configuration information to erupt simultaneously to deliver to FPGA host system, FPGA host system with output interface module links to each other, is used for to receive the PCM signal that configuration information answered with the generating pair to export through output interface module. The utility model discloses a PCM signal generating device has simple structure and commonality advantage such as strong.

Description

A kind of PCM signal generating means

Technical field

The utility model relates generally to telemetry field, refers in particular to a kind of PCM signal generating means.

Background technology

Remote-measuring equipment is used as a kind of approach attention always for obtaining important information.Telemetered signal source is that one kind can be produced The electronic equipment of the various test signals of life, during various domain of telemetry have been widely used in.The modulation of telemetered signal is mainly handle The signal modulation of remote measurement to can by the microwave frequency band of eless channel communication, and can realize multiplex function.Sometimes Wait to more effectively be also needed to by the way of secondary modulation using frequency range, i.e., first to remote measurement modulates baseband signals to subcarrier On, then to carrier wave uniform modulation.The signal modulation mode for adopting at present have continuous wave modulation and impulse modulation both.Pulse is compiled The telemetry system of code modulation (PCM) becomes a kind of currently employed most commonly used remote measurement system due to the various advantages of its own System, but can realize that the general signal generator of general utility functions is also fewer, especially as being continuously increased for remote measurement task density, tradition Testing source can not meet the demand of people.

Utility model content

The technical problems to be solved in the utility model is that：For the technical problem that prior art is present, this practicality is new Type provides a kind of simple structure, the PCM signal generating means of highly versatile.

For solve above-mentioned technical problem, the utility model proposes technical scheme be：

A kind of PCM signal generating means, including host computer, FPGA main control modules, USB communication interface module, output interface Module and supply module, the supply module is connected respectively with FPGA main control modules and USB communication interface module, for providing Need power supply, the USB communication interface module is connected respectively with the host computer and FPGA main control modules, for receiving host computer Configuration information is simultaneously sent to FPGA main control modules, and the FPGA main control modules are connected with the output interface module, for receiving Configuration information is to generate corresponding PCM signal, and Jing output interface modules are exported.

As the further improvement of above-mentioned technical proposal：

The output interface module is connected with the host computer, for verifying to PCM signal.

The output interface module is Single-end output interface or difference output interface.

The supply module is included for being supplied to the 5V power supplys of FPGA main control modules, for being supplied to USB communication interface The 3.3V power supplys and 2.5V power supplys of module.

Compared with prior art, the utility model has the advantage of：

PCM signal generating means of the present utility model, is sent to FPGA main control modules by host computer by signal is configured, by FPGA is according to the almost institute such as the configuration corresponding PCM signal of signal generation, bit rate, pattern, PCM frame structure of this PCM signal There is parameter can arrange by FPGA programmings, and the scope that can be arranged is very big, thus versatility is very strong.

Description of the drawings

Fig. 1 is frame assumption diagram of the present utility model.

Fig. 2 is the circuit theory diagrams of USB communication interface module of the present utility model.

Fig. 3 is the circuit theory diagrams of supply module in the utility model.

Fig. 4 is the circuit theory diagrams of difference output interface in the utility model.

Fig. 5 is the circuit theory diagrams of Single-end output interface in the utility model.

Label is represented in figure：1st, host computer；2nd, USB communication interface module；3rd, FPGA main control modules；4th, output interface mould Block；5th, supply module.

Specific embodiment

The utility model is further described below in conjunction with Figure of description and specific embodiment.

As shown in Figures 1 to 5, the PCM signal generating means of the present embodiment, including host computer 1, FPGA main control modules 3, USB communication interface module 2, output interface module 4 and supply module 5, supply module 5 is logical with FPGA main control modules 3 and USB respectively Letter interface module 2 is connected, for providing required power supply, USB communication interface module 2 respectively with host computer 1 and FPGA main control modules 3 The connected, configuration information for receiving host computer 1 is simultaneously sent to FPGA main control modules 3, FPGA main control modules 3 and output interface mould Block 4 is connected, for receiving configuration information to generate corresponding PCM signal, and Jing output interface modules 4 are exported for miscellaneous equipment Use.Wherein configuration information includes bit rate, frame structure, pattern and waveform.PCM signal generating means of the present utility model, leads to Cross host computer 1 and send signal is configured to FPGA main control modules 3, by FPGA according to the corresponding PCM signal of configuration signal generation, Nearly all parameters such as bit rate, pattern, the PCM frame structure of this PCM signal can be arranged by FPGA programmings, and can be arranged Scope it is very big, thus versatility is very strong.

In the present embodiment, output interface module 4 is connected with host computer 1, for verifying to PCM signal.

In the present embodiment, fpga chip of the FPGA main control modules 3 from the series of Xilinx companies of U.S. Spartan- II XC2S100-6PQ208, it belongs to medium scale SRAM techniques fpga chip, and cost is relatively low.

As shown in Fig. 2 in the present embodiment, USB communication interface module 2 adopts CY7C68013, common IO, Slave are supported Fifo mode, GPIO patterns these three interface modes, different pattern is all different in pin configuration, Slave fifo modes and GPIO pattern lower interface synchronised clocks are also in compliance with different patterns.In order to avoid receiving in equipment firmware procedure development in circuit design To limitation, the mode that the present invention takes is that all of I/O interfaces of CY7C68013 (PA, PB, PD, CTL, RDY, IFCLK) is drawn To on the port of FPGA.

As shown in figure 3, in the present embodiment, supply module 5 is included for being supplied to the 5V power supplys of FPGA main control modules 3, using In the 3.3V power supplys and 2.5V power supplys that are supplied to USB communication interface module 2.Power supply, as the power station of system, is the core of circuit The heart.System can safety and stability work depend primarily on power supply performance quality.The output voltage of supply module 5 have 5V, 3.3V and 2.5V.The port of FPGA and the normal working voltage of USB communication interface module 2 are 3.3V, and the input of external USB mouth is 5V voltages, using power conversion chip the conversion of 5V to 3.3V and 2.5V is realized.Power conversion chip is using TI companies TPS70358 chips.

As shown in Figure 4 and Figure 5, in the present embodiment, in order to meet versatility and diversified requirement, connect using Single-end output The mode of mouth or difference RS-422 output interface exports PCM signal.The Single-end output mode of wherein PCM signal adopts electronic circuit The light-coupled isolation commonly used in design, photoelectric coupled device is substantially the combination of light emitting diode and phototriode, in photoelectricity In amplifier circuit, used as the load of higher level, and the size variation of output current can directly affect luminous two to light emitting diode The power of pole pipe brightness.By optical coupling principle, the power of lumination of light emitting diode makes phototriode output current also send out Changing, Jing after rear class amplifying circuit amplifies, will export amplification signal.Because photoelectric coupling is by " electricity-light-electricity " Conversion reaches the purpose of interstage coupling, so input signal is in electric isolution state with output signal between two-stage.

PCM signal generating means of the present utility model is stable and reliable for performance, perfect in shape and function, small volume, small power consumption, operation dimension Repair conveniently, good environmental adaptability.The remote measurement PCM signal source output pattern has six kinds of NRZ-L/M/S, BI Ф-L/M/S, output code Rate scope is 1Mbps～13Mbps；Data word length is 8 or 16；Exportable data type is sine wave, triangular wave and sawtooth Ripple or fixed value.

Although the utility model is disclosed above with preferred embodiment, but it is not limited to the utility model.It is any Those of ordinary skill in the art, in the case of without departing from technical solutions of the utility model scope, all using the disclosure above Technology contents technical solutions of the utility model are made with many possible variations and modification, or be revised as the equivalent of equivalent variations Embodiment.Therefore, every content without departing from technical solutions of the utility model, it is real to more than according to the utility model technical spirit Any simple modification, equivalent variations and modification that example is made are applied, all should be fallen in the range of technical solutions of the utility model protection.

Claims (4)

1. a kind of PCM signal generating means, it is characterised in that connect including host computer (1), FPGA main control modules (3), usb communication Mouth mold block (2), output interface module (4) and supply module (5), the supply module (5) respectively with FPGA main control modules (3) and USB communication interface module (2) be connected, for providing required power supply, the USB communication interface module (2) is upper with described respectively Machine (1) is connected with FPGA main control modules (3), the configuration information for receiving host computer (1) and send to FPGA main control modules (3), the FPGA main control modules (3) are connected with the output interface module (4), corresponding to generate for receiving configuration information PCM signal, and Jing output interface modules (4) output.

2. PCM signal generating means according to claim 1, it is characterised in that the output interface module (4) with it is described Host computer (1) is connected, for verifying to PCM signal.

3. PCM signal generating means according to claim 1 and 2, it is characterised in that the output interface module (4) is Single-end output interface or difference output interface.

4. PCM signal generating means according to claim 1 and 2, it is characterised in that the supply module (5) includes using In being supplied to the 5V power supplys of FPGA main control modules (3), the 3.3V power supplys for being supplied to USB communication interface module (2) and 2.5V Power supply.