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Frequency-conversion phase-modulating signal instrument

A technology of signal meter and frequency conversion circuit, which is applied in the field of physical experimental instruments, can solve the problems of Lissajous's graphics instability, affect the experimental effect, cannot guarantee the constant phase difference, etc., and achieve the effect of overcoming the graphics instability and improving the experimental effect.

Inactive Publication Date: 2012-07-25
JIANGNAN UNIV
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Problems solved by technology

Since the two independent signal sources cannot guarantee the constant phase difference of the two signals participating in the synthesis, it will be observed that the Lissajous figure is unstable and constantly changing, which will affect the experimental results

Method used

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  • Frequency-conversion phase-modulating signal instrument
  • Frequency-conversion phase-modulating signal instrument
  • Frequency-conversion phase-modulating signal instrument

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Embodiment Construction

[0011] Such as figure 1 , figure 2 As shown, a frequency conversion phase modulation signal instrument 1 of the present invention is composed of a signal input interface 2, a signal output interface 3, a signal output interface 4, a frequency conversion circuit module 5, and a phase modulation circuit module 6. The signal output interface 3 is directly connected to The signal input interface 2 is connected, and the signal output interface 4 is respectively connected to the phase modulation circuit module 6 and the frequency conversion circuit module 5 through wires and then connected to the signal input interface 2. The frequency modulation knob 7 is connected to the frequency conversion circuit module 5 for adjusting the frequency of the signal output to the signal output interface 4, the phase modulation knob 8 is connected to the phase modulation circuit module 6 for adjusting the signal phase output to the signal output interface 4, and the digital display 9 is used for Di...

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Abstract

The invention discloses a frequency-conversion phase-modulating signal instrument, comprising a signal input interface, two signal output interfaces, a frequency-conversion circuit module and a phase-modulating circuit module and the like, wherein one signal output interface is directly connected with the signal input interface, and the other signal output interface is connected with the signal input interface after being connected with the phase-modulating circuit module and the frequency-conversion circuit module respectively. The frequency-conversion phase-modulating signal instrument is characterized in that the frequency ratio and the phase difference of two output signals of the frequency-conversion phase-modulating signal instrument can be adjusted, stable lissajous figures at different frequency ratios and different phase differences can be observed from an oscilloscope. The frequency-conversion phase-modulating signal instrument has the advantages that the defect of unstable lissajous figures in the original experiment is overcome, the effect of the experiment is improved, and the more practical and convenient effects are achieved.

Description

Technical field [0001] The invention belongs to the field of physical experiment instruments, and relates to an experiment signal instrument, in particular a frequency conversion phase modulation signal instrument. Background technique [0002] When observing the synthesis of two mutually vertical simple harmonic motions on an oscilloscope, two audio signal generators are usually connected to the x and y inputs of the oscilloscope respectively. When the frequency of the two signals is a simple integer ratio, it can be observed on the oscilloscope The synthesized Lissajous is shown in the picture. The shape of the Lissajous figure is closely related to the phase difference of the two signals. When the frequency ratio is the same but the phase difference is different, the Lissajous figure is obviously different. Since two independent signal sources cannot guarantee a constant phase difference between the two signals participating in the synthesis, it will be observed that the Liss...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K3/02
Inventor 陈健陈康
Owner JIANGNAN UNIV
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