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The comparator hypothesis arose primarily in response to so-called “cue competition” effects. If for example in classical conditioning, two conditioned stimuli A and B are presented with an unconditioned stimulus, one may find on test that the subject responds to A or to B or to both or not very much to either.
Non-inverting circuit. The classic non-inverting Schmitt trigger can be turned into an inverting trigger by taking V out from the emitters instead of from a Q2 collector. In this configuration, the output voltage is equal to the dynamic threshold (the shared emitter voltage) and both the output levels stay away from the supply rails.
In psychology and cognitive science, a schema (pl.: schemata or schemas) describes a pattern of thought or behavior that organizes categories of information and the relationships among them. [ 1 ] [ 2 ] It can also be described as a mental structure of preconceived ideas, a framework representing some aspect of the world, or a system of ...
An op amp without negative feedback (a comparator) The amplifier's differential inputs consist of a non-inverting input (+) with voltage V + and an inverting input (−) with voltage V −; ideally the op amp amplifies only the difference in voltage between the two, which is called the differential input voltage.
A comparator system, or simply comparator, in the fields of biophysics, biology, and neurology is a particular organisation of neurons. [1] Comparators, as their name suggests, compare several inputs of internal or external information, and are important to the field of neural learning.
For example, it has been found that breast cancer patients made the majority of comparisons with patients less fortunate than themselves. [23] Ashby found similar results in his experiment showing, downward comparison in people subjected to distress from a physical illness such as heart disease or cancer.
When the inverting input is at a higher voltage than the non inverting input, the output of the comparator connects to the negative power supply. When the non inverting input is higher than the inverting input, the output is high impedance, so the output voltage in this state can be set by an external pull-up resistor to a different voltage supply.
This is because the non-inverting input is less than the inverting input, and as the output continues to decrease, the difference between the inputs gets more and more negative. Again, the inverting input approaches the comparator's output voltage asymptotically, and the cycle repeats itself once the non-inverting input is greater than the ...