Square wave signal generator

A square wave generator and signal generator technology, applied in the direction of pulse train generator, pulse generation, electric pulse generation, etc., can solve the problem of limited minimum duty cycle of low frequency signal, large edge time, large signal jitter, etc. problem, to achieve the effect of finely adjustable duty cycle, fast edge, and low jitter

Pending Publication Date: 2016-10-26
SHENZHEN CITY SIGLENT TECH
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  • Claims
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AI Technical Summary

Problems solved by technology

The disadvantage of the first type is that the signal jitter is large, the trigger position is unstable, the adjustable range of the edge is small and the adjustment is difficult, and the duty cycle adjustment accuracy is small
Another disadvantage is that the size of the edge is affected by the frequency of the square wave signal. The edge time is very large (millisecond level) at low frequencies, and fast edges (nanosecond level) cannot be set, and the duty cy

Method used

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Embodiment Construction

[0023] The present application will be described in further detail below through specific embodiments in conjunction with the accompanying drawings.

[0024] Such as figure 1 As shown, a square wave signal generator 1 provided in this application includes an input device 11 , a DDS module 2 , a control unit 3 , a waveform selection unit 41 , an adjustment unit 51 and a comparator 52 . The input device 11 is connected with the control unit 3, the DDS module 2 is connected with the waveform selection unit 41, and the waveform selection unit 41 is also connected with the comparator 52, and the control unit 3 is connected with the input device 11, the DDS module 2, the waveform selection unit 41 and the waveform selection unit 41. The regulating unit 51 is connected. in,

[0025] The input device 11 is connected with the control unit 3 and is used for receiving the parameters of the required square wave signal input by the user, and the parameters are converted into waveform par...

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Abstract

The present invention discloses a square wave signal generator. The square wave signal generator includes a direct digital synthesizer (DDS) module, a wave shape selecting unit and a comparator. The DDS module is connected with the wave shape selecting unit. The wave shape selecting unit is connected with the comparator. At low frequency and high frequency, the square wave signal generator separately selects different initial signals as initial wave shapes. At low frequency, a fast pulse signal is selected, and at high frequency, a basic wave shape signal is selected. Level comparison and shaping are performed by using a comparator circuit, so that a low frequency square wave that is faster, jitters lower, and has a fine and adjustable duty cycle is obtained, and a high frequency square wave that is faster and jitters lower is obtained. The square wave signal generator has the advantages of the fast pulse signal and the comparator circuit.

Description

technical field [0001] The present application relates to the field of electronic instruments, in particular to a square wave signal generator. Background technique [0002] DDS (Direct Digital Synthesizer) is a direct digital frequency synthesizer that can generate basic waveform signals. At present, there are two traditional methods for generating square wave signals: one is a comparator circuit built with discrete components, and the basic waveform generated by DDS The waveform signal is compared and shaped to obtain a square wave signal; the other is to fill the corresponding square wave data into the waveform data memory according to different needs, and then directly output the square wave signal in the form of DDS. The disadvantage of the first type is that the signal jitter is large, the trigger position is unstable, the adjustable range of the edge is small and the adjustment is difficult, and the duty cycle adjustment accuracy is small. Another disadvantage is tha...

Claims

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Application Information

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IPC IPC(8): H03K3/017H03K3/64
CPCH03K3/017H03K3/64
Inventor 蔡臻昱宋民梁振兴阮仲华
Owner SHENZHEN CITY SIGLENT TECH
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