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What are the pros and cons of larger vs smaller pull-up resistors for open-drain CMOS outputs or open-collector TTL outputs?
Wiki User
∙ 16y ago
== == As with most things, it simply comes down to money, and space. A larger PU resistor will guarantee a more solid output, but they cost more, take up more space, & waste more energy by creating more heat. So, if you have a small box with other heat producing devices, additional space and/or cooling may be needed.
A smaller PU resistor will be cheaper and use less space, but may not provide a solid, consistent output. Make sense??? Please 'Recommend Contributor' By the way, what is the application for these PUs?
Wiki User
∙ 16y ago
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How are parallel resistors connected?
If you need a resistor of a certain value, and you have no resistors with small enough values,you can create the one you need by connecting several of those you have in parallel.The effective net resistance of resistors in parallel is always less than the smallest individual.And the more resistors you add in parallel, the smaller the net effective resistance becomes.
Two resistors are connected to a 9 volt battery the larger one provides twice as many ohms as the small one the current through the circuit is 3 amps what is resistance of larger resistor?
If the two resistors are in series, then the larger one is 2 ohms.(The smaller one is 1 ohm. Their combined series total is 3 ohms. 9/3 = 3 amps.)If the two resistors are in parallel, then the larger one is 9 ohms.(The smaller one is 4.5 ohms. The combined parallel total is 3 ohms. 9/3 = 3 amps.)
When resistors are put in parallel with each otherwhat happen to their resistance?
Call the total effective resistance 'R'. If the values of the individual parallel resistors are 'A', 'B', 'C', 'D' etc., then 1/R = (1/A) + (1/B) + (1/C) + (1/D) etc. Or, R = 1 divided by { (1/A) + (1/B) + (1/C) + (1/D) } The more resistors there are in parallel, the SMALLER the effective resistance becomes.
Characteristics of resistor in series and parallel connection?
Resistors in series add resistance to an electrical circuit. For instance two 1 ohm resistors in series will have 2 ohms of resistance. Resistors in parallel divide the resistance between them. Thus two 2 ohm resistors in parallel will have 1 ohms total resistance. resistors of different sizes work the same way. a 4 ohm and 2 ohm resistor in series have 6 ohms resistance. While in parallel they will have .75 ohm resistance. resistance formulas: series: Req = r1+r2+r3....+rx parallel: Req = 1/r1 + 1/r2 + 1/r3 ..... +1/rx
How to measure resistance of series combination?
When connected in series, the overall effective resistance of a bunch of individual resistors is the sum of the individual resistances. It's always more than the resistance of any individual. When connected in parallel, the reciprocal of the overall resistance of a bunch of individual resistors is the sum of the reciprocals of the individual resistances. It's always less than the resistance of any individual. When two resistors are connected in parallel, the overall effective resistance of the pair is (the product of the two individual resistances) divided by (the sum of the two individual resistances). It's always less than the smaller individual resistance.
What are the main condition for resistors in parallel?
Two resistors wired in parallel means that both resistors are soldered together to equal the value of a smaller resistor value. Both resistors will be connected to the same line on the circuit board and then both will terminate on the same final line they are assigned to. Thus, a pair of 100k ohm resistors can take the place of one 50k ohm.
How do resistors act in parallel?
Parallel resistors act like a resistor smaller than the smallest parallel resistor. Calculate as 1/(1/R1+1/R2+1/R3...)
How are parallel resistors connected?
If you need a resistor of a certain value, and you have no resistors with small enough values,you can create the one you need by connecting several of those you have in parallel.The effective net resistance of resistors in parallel is always less than the smallest individual.And the more resistors you add in parallel, the smaller the net effective resistance becomes.
Two resistors are connected to a 9 volt battery the larger one provides twice as many ohms as the small one the current through the circuit is 3 amps what is resistance of larger resistor?
If the two resistors are in series, then the larger one is 2 ohms.(The smaller one is 1 ohm. Their combined series total is 3 ohms. 9/3 = 3 amps.)If the two resistors are in parallel, then the larger one is 9 ohms.(The smaller one is 4.5 ohms. The combined parallel total is 3 ohms. 9/3 = 3 amps.)
What is the name of the program that reads a string of text data and outputs a graphic where the more common words are larger and less common words are smaller?
It is called a word cloud.
When resistors are put in parallel with each otherwhat happen to their resistance?
Call the total effective resistance 'R'. If the values of the individual parallel resistors are 'A', 'B', 'C', 'D' etc., then 1/R = (1/A) + (1/B) + (1/C) + (1/D) etc. Or, R = 1 divided by { (1/A) + (1/B) + (1/C) + (1/D) } The more resistors there are in parallel, the SMALLER the effective resistance becomes.
Characteristics of resistor in series and parallel connection?
Resistors in series add resistance to an electrical circuit. For instance two 1 ohm resistors in series will have 2 ohms of resistance. Resistors in parallel divide the resistance between them. Thus two 2 ohm resistors in parallel will have 1 ohms total resistance. resistors of different sizes work the same way. a 4 ohm and 2 ohm resistor in series have 6 ohms resistance. While in parallel they will have .75 ohm resistance. resistance formulas: series: Req = r1+r2+r3....+rx parallel: Req = 1/r1 + 1/r2 + 1/r3 ..... +1/rx
Two resistors are connected in series to a 9 volt battery. The larger resistor provides twice as many ohms resistance as the smaller one. The current through the circuit is 3 amps. What is the resista?
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Why is it better to use the kilo ohm rather than an ohm rage of resistors?
For smaller values (eg below 1000), simply use ohm, for biggers (above 1000000) use megohm, between them use kilo-ohm.
How to measure resistance of series combination?
When connected in series, the overall effective resistance of a bunch of individual resistors is the sum of the individual resistances. It's always more than the resistance of any individual. When connected in parallel, the reciprocal of the overall resistance of a bunch of individual resistors is the sum of the reciprocals of the individual resistances. It's always less than the resistance of any individual. When two resistors are connected in parallel, the overall effective resistance of the pair is (the product of the two individual resistances) divided by (the sum of the two individual resistances). It's always less than the smaller individual resistance.
What is symbol for a resistors?
labeled R, a resistor looks like this in a diagram-----/\/\/\/\/\-----add a variable resistor has an arrow superimposed at an angle.The modern symbol is a thin rectangle, with the lead outs shown at the centre of the smaller ends.The old symbol was shown as a Zigzag.
How can computer chips be made smaller?
A computer chip is an assembly of a large number of individual transistors, which in turn are arranged as switches. The driving configuration of a switch consists of resistors and capacitors. In order to make these components smaller, they may be made to operate at a higher frequency. Since the actual quantity of energy used to change the state of a switch becomes smaller, this also has the serendipitous outcome of needing less cooling per switch. This necessarily demands that the manufacturing process become capable of even smaller and more dense layout.
