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Ejaz484
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Join Date: Sep 2010
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Design of Automatic Peak Detector and Hold Circuit

09/29/2010 3:19 AM

can any one help me how can we design a circuit which will automatically hold the peak value for the specific period?
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nick name
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#1

Re: Design of automatic peak detector and hold circuit

09/29/2010 5:52 AM

Make a suggestion and it will be corrected if wrong. CR4 does NOT solve home work.
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user-deleted-1105
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#2

Re: Design of automatic peak detector and hold circuit

09/29/2010 6:34 AM

Read 'Operational Amplifiers' by GB Clayton.
It worked for me.
Or google 'peak hold op amp circuit'.
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JohnDG
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#3

Re: Design of automatic peak detector and hold circuit

09/29/2010 7:05 AM

How fast to you want it to operate (maximum dV/dt of input)? What is the maximum permissible droop rate? What is the maximum repeat rate/minimum reset period? How are you going to reset it? What is the range of input voltages? What accuracy do you need?

Have you thought this through?

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user-deleted-1105
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#4
In reply to #3

Re: Design of automatic peak detector and hold circuit

09/29/2010 7:18 AM

The droop rate is much quicker these days
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JohnDG
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#5
In reply to #4

Re: Design of automatic peak detector and hold circuit

09/29/2010 7:26 AM

You've noticed that too?

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Ejaz484
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#6
In reply to #3

Re: Design of automatic peak detector and hold circuit

09/29/2010 7:35 AM

i want to discharge it in 1microsec and the droop rate must be less
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user-deleted-1105
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#7
In reply to #6

Re: Design of automatic peak detector and hold circuit

09/29/2010 7:55 AM

Yeah but what is 'it'?
You need to give full information if you want helpful answers.
You have answered about 20% of John's questions.
If 'it' is from a source with a reasonable output impedance then an R and a C will do the job with maybe a transistor to dicharge the C, and a sprinkle of diodes...(cats like diodes).
Del

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Previous in Forum: How Can I Discharge a 5vp-p, 1khz in 1 Micro Sec   Next in Forum: Mat-Lab for Auto-Regressive Modeling?

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