If i direct a laser beam through a piece of a certain material of differing density onto a phototranistor, what would be the best way to amplify this signal?
i.e. through an op amp, or through a couple of transistors?
The output will be fed into a computer via "powerlab" and therefore needs to be in the range of 1mv to 1V.
With the voltage range you spec...you are looking at something that has a gain of around 1000...Op amp looks favourable...You may need to stage the gain...
With the voltage range you spec...you are looking at something that has a gain of around 1000...Op amp looks favourable...You may need to stage the gain...
An ordinary opamp has a gain of about 200,000 from dc to about 5Hz. Negative feedback can be added to reduce the gain and increase the cutoff frewquency.
Or additional opamp amplifier circuits can be used for a higher cutoff frequency with more gain.
An ordinary opamp has a gain of about 200,000 from dc to about 5Hz. Negative feedback can be added to reduce the gain and increase the cutoff frewquency.
Or additional opamp amplifier circuits can be used for a higher cutoff frequency with more gain.
An opamp only oscillates when it is built on a horrible breadboard with wires all over the place. On a properly designed pcb or Veroboard it works perfectly.