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Re: New package MathTools [message #51674 is a reply to message #51666]

Wed, 24 April 2019 13:29

peterh is currently offline

peterh
Messages: 108
Registered: November 2018
Location: Germany

Experienced Member

Results of stress-test:

1||0 = 0
0||0 Error Division by zero
-1||0 Error Division by zero
-1 || -1 Error Division by zero
1||1 = 0.5

If (arg1 * arg2) = 0 then the result is 0, else the result is arg1*arg2/(arg1+arg2). Rolling Eyes

Rolling Eyes

And yes, there are negative resistors.

A negative resistor produces energy and gets cold when it does so. Very Happy

Very Happy

Unfortunately it is not available as discrete component. It stops working when it gets cold, that is the technological problem and causes resistor noise. Very Happy

Very Happy

Very Happy

I am kidding Very Happy

Very Happy

To be serious:
For example the input impedance of an amplifier with positive feedback can be negative.

Negative resistors can exist in active circuits only as a mathemathik intermediate result.
This means only two complementary resistor values should lead to division by zero e.g. -1||1 = infinite resistance = division by zero.

[Updated on: Wed, 24 April 2019 17:59]

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[Message index]

		New package MathTools By: koldo on Sun, 27 December 2015 11:38
		Re: New package MathTools By: deep on Sun, 27 December 2015 14:22
		Re: New package MathTools By: koldo on Sun, 27 December 2015 20:54
		Re: New package MathTools By: peterh on Mon, 22 April 2019 12:19
		Re: New package MathTools By: koldo on Tue, 23 April 2019 09:35
		Re: New package MathTools By: peterh on Tue, 23 April 2019 10:47
		Re: New package MathTools By: koldo on Tue, 23 April 2019 11:43
		Re: New package MathTools By: peterh on Tue, 23 April 2019 12:11
		Re: New package MathTools By: koldo on Wed, 24 April 2019 07:29
		Re: New package MathTools By: peterh on Wed, 24 April 2019 10:31
		Re: New package MathTools By: peterh on Wed, 24 April 2019 13:29
		Re: New package MathTools By: peterh on Sat, 27 April 2019 18:35
		Re: New package MathTools By: koldo on Sat, 27 April 2019 22:12
		Re: New package MathTools By: peterh on Mon, 29 April 2019 08:46

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