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Waveform selection output [Copy link]

I have three waveform inputs here, triangle wave, sine wave, and rectangular wave, and an external control voltage 0-10V

What kind of circuit or IC can select these three waveforms and output them separately at 0V 5V 10V?

Other voltage controls between 0-10V are waveforms of mixed outputs in pairs.

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The host did not make the request clear. First, "when 0V, 5V, and 10V are selected and output separately", are they the exact values of the three voltages? Or a certain voltage range? If the exact values must be given, the error range must also be given, otherwise there is no need to do it because it cannot be done. Second, "other voltages control the voltage between 0-10V and the waveforms are mixed and output by two combinations". What waveforms are produced in what voltage range? Is it mixed in a fixed ratio? Or is the mixing ratio related to the input voltage of 0 to 10V? If it is the former, it can be realized by using a comparator plus a logic circuit; if it is the latter, a multiplier or VGA should be used to control the ratio, and then op amps should be superimposed.   Details Published on 2020-11-14 20:41

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You can use a comparator to identify the voltage, and then control the analog switch through combinational logic, but this method is more troublesome, and it is easiest to control it with a cheap MCU with ADC. However, it should be noted that whether the signal source allows parallel output must be examined, and the original poster did not clearly state the amplitude and frequency of the three signals, nor the output amplitude and internal resistance requirements, so whether the above solution can be implemented still needs further consideration.

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The comparator is OK, but when other voltages are used, such as 0V, 5V, or 10V, there must be a mixed output of two or three waveforms.   Details Published on 2020-11-11 14:59
 
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chunyang published on 2020-11-11 14:54 You can use a comparator to identify the voltage, and then use combinational logic to control the selection of the analog switch, but this method is more troublesome. Using a cheap MCU with ADC to control the simplest...

The comparator is OK, but when other voltages are used, such as 0V, 5V, or 10V, there must be a mixed output of two or three waveforms.

This post is from Analog electronics

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Therefore, it cannot be controlled directly and requires combinational logic design, which is worse than using MCU.  Details Published on 2020-11-11 15:15
 
 
 
 

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fangfang120 posted on 2020-11-11 14:59 The comparator is OK, but when it comes to other voltages besides 0V 5V 10V, there must be a mixed output of two or three waveforms

Therefore, it cannot be controlled directly and requires combinational logic design, which is worse than using MCU.

This post is from Analog electronics
 
Personal signature上传了一些书籍资料,也许有你想要的:https://download.eeworld.com.cn/user/chunyang
 
 
 

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Using a microcontroller with ADC is the simplest and most convenient way.

It is still a question whether the three signal sources mentioned by the OP can be "mixed output in pairs". If they are voltage sources, they cannot be directly connected in parallel for mixed output.

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Curious, why is there such a strange request!

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The host did not make the request clear.

First, "when 0V, 5V, and 10V are selected and output separately", are they the exact values of the three voltages? Or a certain voltage range? If the exact values must be given, the error range must also be given, otherwise there is no need to do it because it cannot be done.

Second, "other voltages control the voltage between 0-10V and the waveforms are mixed and output by two combinations". What waveforms are produced in what voltage range? Is it mixed in a fixed ratio? Or is the mixing ratio related to the input voltage of 0 to 10V? If it is the former, it can be realized by using a comparator plus a logic circuit; if it is the latter, a multiplier or VGA should be used to control the ratio, and then op amps should be superimposed.

This post is from Analog electronics
 
 
 
 

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