I know that zener diods are generally do that but their saturation range (I am not sure if it is the accurate term) is like an exponential curve. For example, a 10v zener shows a very small resistance at exact 10v.
2 Answers
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Depending on what you are really after, it may need a whole circuit with multiple components to do what you want.
For example a comparator can be used to have an output depending on how two monitored voltages compare with each other. So it still needs a stable reference voltage to which your input voltage is compared with. It can be done with a zener but better components exist too. And you can make it adjustable.
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\$\begingroup\$ That one I know :) Of course voltage regulator chips etc. etc are so plentiful in the market these days and they are not very expensive either. My question is merely a learning objective. I just wanted to know if there is anything other than zeners that can do a more accurate job with quicker response. By "quick response" I mean becoming conductive ( and passing the max current that they can) within a range of 10 to 50 mv \$\endgroup\$– user273997Commented Nov 21 at 20:40
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\$\begingroup\$ @Sabrina what do you mean by quick? minutes? seconds? milliseconds? microseconds? \$\endgroup\$ Commented Nov 21 at 20:51
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\$\begingroup\$ @ Solar Mike no need for your sarcasm or answers. Just for your education, minutes and seconds ..... can be expressed in a fraction or decimal form of others. \$\endgroup\$– user273997Commented Nov 21 at 21:21
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Check out, for example, the LM185/285/385 family of fixed and adjustable pseudo-zener-diodes.
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2\$\begingroup\$ Can you expand this answer? \$\endgroup\$– Voltage Spike ♦Commented Nov 21 at 21:01
open? conducting or not conducting ... please do not use vague terms like open and closed \$\endgroup\$