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A multi-channel isolation function signal generator and signal generation method

A function signal and multi-channel technology, which is applied in the field of multi-channel isolated function signal generators, can solve problems such as bulky, inconvenient operation, and out-of-synchronization of parameter settings, and achieve the effect of wide application fields and improved technical indicators

Inactive Publication Date: 2016-09-28
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the time base of each multiple function generators is different, the parameter settings are not synchronized, which will also cause the time accumulation distortion of the series waveform signal, the longer the time, the greater the waveform distortion
Moreover, multiple function generators work at the same time, which is bulky and inconvenient to operate.

Method used

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  • A multi-channel isolation function signal generator and signal generation method
  • A multi-channel isolation function signal generator and signal generation method
  • A multi-channel isolation function signal generator and signal generation method

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Experimental program
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Embodiment 1

[0031] Combine figure 2 , Is the first preferred embodiment of the present invention. figure 2 The block diagram of the 24-channel isolated function signal generator, image 3 for figure 2 The principle block diagram of the control control unit shown, Figure 4 for figure 2 The principle block diagram of the analog unit shown, the working principle of each block diagram and the multiple application modes of the channel signal can be seen in the relevant discussion in the foregoing summary of the invention.

[0032] figure 2 The programmable logic device in the FPGA device EP2C8Q208; the external crystal clock frequency is 40MHz, the system clock Fsys is 280MHz after the phase-locked loop frequency is multiplied, and the base frequency clock FBAS is 140kHz.

[0033] in image 3 In the logic control unit, the amplitude word is 16bit, the frequency word is 40Bit, the phase word is 12Bit, and the pulse width word is 10Bit. The amplitude resolution is 0.01%, the frequency of sine an...

Embodiment 2

[0036] Combine Figure 5 , Is the second preferred embodiment of the present invention. The working principle is the same as that of the first embodiment, except that the parameters and function signal technical indicators of the used components are different.

[0037] in Figure 5 Among them, the programmable logic device uses the CPKD device EPM570T100; Fsys is an external crystal frequency of 50MHz, and Fsys is a 25kHz base frequency clock FBAS with even frequency division.

[0038] Figure 5 In the control logic unit, the amplitude word is 16bit, the frequency word is 36Bit, the phase word is 12Bit, and the pulse width word is 10Bit. The amplitude resolution is 0.01%, the frequency of sine and pulse signals can reach 20kHz, the frequency resolution is 1mHz, the phase resolution is 0.1 degree, and the pulse width resolution is 0.1%.

[0039] in Figure 5 Among them, the positive and negative 15V isolated power supply is generated by the conversion of the chip DCH010515D; the 4...

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Abstract

The invention provides a multi-channel isolation function signal generator and a signal generating method. The multi-channel isolated function signal generator includes a single-chip programmable logic device and an analog unit, and the programmable logic device is embedded with an interface circuit, a clock generation circuit and a logic control unit. The present invention can directly generate isolation function signals of several to dozens of channels; each channel function signal has three modes of DC, sine, and pulse; the amplitude, frequency, phase, and pulse width parameters of each channel signal can be set independently, and the amplitude up to 20V.

Description

Technical field [0001] The invention relates to a multi-channel isolation function signal generator, in particular to a multi-channel function signal generator that requires channel isolation, synchronization, multi-signal superposition, large signal voltage variation range and the like. Background technique [0002] The function signal generator is a kind of signal generator, because it can generate sine waves of different amplitudes, frequencies, and phases. It is usually used as an excitation source in scientific research and equipment testing in many fields. For excitation signal sources in non-communication fields, the signal frequency band does not need to be very high. In some occasions, it is necessary to provide several electrically isolated waveform signals as the excitation of different electrical equipment components, and sometimes these electrically isolated multi-channel signals are required to maintain a certain phase relationship and synchronization relationship b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K3/02
Inventor 童子权任丽军于晓洋姜月明马艳艳熊浩东
Owner HARBIN UNIV OF SCI & TECH
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