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Results tagged with operational-amplifier
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user 16658
Questions relating to the construction and applications of operational amplifiers, which are DC-coupled, high-gain electronic voltage amplifiers with a differential input and, usually, a single-ended output.
1
vote
Accepted
Blending between exponential and linear control voltages
Consider this:
Provided the source impedance is low enough to not be disturbed by the load of the potentiometer R.
The input impedance of IC should be high compared to R. If not it will affect the li …
- 412
0
votes
Understanding analog frontend for PIR sensor
Agree - the diodes are clamping. May I add to what @Hedgehog writes that it is AC gain only. The principle of a PIR sensor is to have a sensor which is sensitive to infrared light but its sensitivity …
- 412
2
votes
Is it possible to make a high-impedance voltage follower using a fully-differential op amp?
Try this circuit:
Inspired by datasheet for LTC6362
If you have an existing circuit but with resistors, it is probably easy to test.
- 412
1
vote
Accepted
Don't understand this zero pole plot example
In the equation 5-10 put s=0 to get the dc-gain. It is ½ = -6dB. this fits perfect with figure 5-12
Figure 5-11 shows 4 different bode plots in the same diagram - one for each factor. I.e. one for x½, …
- 412