The phrase "a positive feedback circuit" is correct and usable in written English.
It can be used in contexts related to electronics, biology, or systems theory, where feedback loops amplify changes or effects.
Example: "In our experiment, we observed that the system operated more efficiently due to a positive feedback circuit that enhanced the output."
Alternatives: "an amplifying feedback loop" or "a reinforcing feedback mechanism".
This, in turn, would increase the cirrus cloud cover, effectively creating a positive feedback circuit.
Concluding from the above results, we hypothesize that there is a positive feedback circuit for neuronal-glial interaction under neuropathic pain states.
So astrocytic activation not only passively acts as the downstream of neuronal activation, but can also enhance the upstream neuronal activation, thus a positive feedback circuit probable exists between these two key elements in the spinal cord during pain states.
One recent paper reported a tight relationship between RIZ1 and p53 due to a positive feedback circuit [ 21].
HBx-NF-κB forms a positive feedback circuit, which might account for the HBV-related carcinogenesis [ 33].
As an example, linc-1552 is a WDR5-interacting lncRNA that acts in a positive feedback circuit for pluripotency.
This situation likely led to a positive-feedback circuit (the processes of 21 25 shown in Figure 5A), also activated by upstream Ca2+, to be more prevalent in the OT system.
Thus this circuit is an example of a global positive feedback circuit, with the feedback element being uniform and spread out everywhere.
Recently, Tan et al. [ 32] have proposed a new mechanism by which bistability arises from a noncooperative positive feedback circuit and circuit-induced growth retardation.
This switch involves a simple positive feedback circuit where the active form of a species activates the active form of another species Y which feeds back to enhance the production of X∗.
As exemplified by this study the lentiviral transduction of a synthetic positive feedback circuit proves useful.
