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Why should the input resistance of a instrumentation amplifier be as high as possible?
Wiki User
∙ 12y ago
Comment: If you are not sure about your facts, I see little point in offering an answer.
AnswerConnecting an amplifier to a transducer/sensor inevitably changes the conditions of the phenomena being measured. This is due, primarily, to the amplifier drawing, an albeit small, current from the transducer.The higher the amplfier's input impedance, the lower the current drawn, and hence the less the disturbance to the original conditions.
Wiki User
∙ 12y ago
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Why clipping should be accounted for in designing amplifier circuit?
A: If an amplifier can be subjected to either input or output overdrive then clipping of both is desirable to insure safety margin and insure amplifier recovery in a minimum time
What can be used as an amplifier?
Lots of things can be amplifiers. They can be as simple as a single transistor. Picking an amplifier requires a bit of system knowledge. What's the signal to be amplified? What is the output delivered to? Should the "DC" bias levels be decoupled? Here's an example: An audio amplifier is typically a voltage-in, power-out device. So, the input should have high impedance, while the output has low impedance. The device should be powerful enough to handle large currents and power levels. A radio-frequency amplifier is typically power-in, power-out (with impedances matched to 50 Ohms to avoid signal reflection). A typical blood glucose sensor typically has a current output. So, connecting it to a microcontroller and displaying the result would require a current-to-voltage amplifier. For most of these applications, it is possible to adapt an operational amplifier to create the desired amplification (trans-impedance, trans-conductance, etc.). Sometimes, when higher performance is required, it's necessary to build a circuit using OTA's (operational transconductance amplifiers) and transistors (common-source, common-emitter, common-base, mirrors, folded cascodes, etc). It's usually easier to find a special-purpose one to buy (e.g., buy an audio amp, or a RF amp, or an instrumentation amp, etc from Digikey). Hope this helps!
What reverse resistance reading should diodes have when under test with an ohmmeter?
Reverse resistance should be infinite.
What should be earhing resistance in house?
Earth ground resistance. There is not one standard ground resistance threshold that is recognized by all agencies. However, the NFPA and IEEE have recommended a ground resistance value of 5.0 ohms or less. The NEC has stated to "Make sure that system impedance to ground is less than 25 ohms specified in NEC 250.56. In facilities with sensitive equipment it should be 5.0 ohms or less." The Telecommunications industry has often used 5.0 ohms or less as their value for grounding and bonding. The goal in ground resistance is to achieve the lowest ground resistance value possible that makes sense economically and physically.
What is the maximum resistance you want to see across a switch?
The maximum resistance across a switch should be infinite.
Set up 2 4 ohm sub to 2 ohm?
If you are trying to pump a 2.4 ohm sub with a 2 ohm rated amplifier you should be fine. The rating on the amplifier is the least resistance it should have on its load. Anything less than 2 ohms would fry your amp.
Should all the materials that make up a circuit have high resistance?
No. There should be substantial resistance only where the circuit design needs it and wants it, and as little as possible everywhere else in the circuit.
Can one install themselves, or should they seek professional help?
You can install your own amplifier and you will save allot of money. To install an amplifier yourself you should get a How to Guide on how to install an amplifier.
How do you test speaker wire?
If you have access to a multi-meter, do a resistance check from end to end on each core while the cable is disconnected. You should have close to 0 ohms on both cores. Do a resistance check between the cores, while the cable is disconnected. You should have an open circuit between the two. Alternatively, connect one end to an amplifier, the other to a speaker and listen for sound. If nothing is heard, substitute the cable, then the speaker and finally the amplifier to establish where the fault is.
What precautions are associated with spinal instrumentation?
Since the hooks and rods of spinal instrumentation are anchored in the bones of the back, spinal instrumentation should not be performed on people with serious osteoporosis. To overcome this limitation, techniques are being explored.
What brand of amplifier should be avoided for lack of quality?
Neuhaus T-2 Amplifier is not so good.
Are there powered car speakers or do you absolutely need an amplifier?
You should get a amplifier if you want good sound quality out of your speakers.
What should a person look for when buying car speakers?
When purchasing car speakers you'll need to know what size you need, the amount of watts they speakers can handle and their resistance level. You'll also need to understand the resistance level and wattage output of either the stereo or amplifier that is sending the power the signal to the speakers.
Seminar topic on instrumentation measurement?
organisational unit
How do design a high voltage voltmeter?
Use a voltage divider and an standard high input impedance voltmeter connected to the low voltage output tap of the divider. Just check that: a) the voltage divider has enough resistance to minimize loading of the voltage source (The voltage divider resistance should be as high as possible). b) the voltmeter's input impedance is at least 10-20 times larger than the output resistance (impedance) of the divider. If necessary add a high-input impedance amplifier or a transducer between the divider output and the voltmeter. What is high voltage for you?
If you have two 1400 watt subwoofers that have a 700 watt RMS should you get an amplifier that has the watts of both of the subwoofers together 2800 or should you get an amplifier with only 1400 watts?
get the 2800
True or False Active resistance should be the immediate response to an active shooter incident?
False The first response should be to flee/evacuate If flight or evacuation is not possible, hiding or sheltering in place should be the next preferred response. Active resistance should be the last resort - but if undertaken it should be done immediately and fully committed to.
