The phrase "a comparator is" is correct and usable in written English.
You can use it when defining or explaining what a comparator is in a technical or descriptive context.
Example: "In electronics, a comparator is a device that compares two voltages and outputs a digital signal indicating which is larger."
Alternatives: "a comparison device is" or "a comparison tool is".
Evaluations that are not comparative and do not consider both costs and consequences, and/or a comparator is classified as a partial evaluation (e.g., 1A, 1B, 2).
Another possibility for a comparator is 'do nothing', if no eligible standard care for comparison is available.
18 We recognise that the use of an expectantly managed group as a comparator is not without difficulty.
The importance of a comparator is also evident when one describes measurements of tracheomalacia, bronchomalacia and or airway stenoses.
To achieve this, a comparator is required which represents non-cancer tissue, that is, primary cell culture or an immortalised 'normal' cell line (usually achieved by hTERT overexpression).
As use of a pure placebo control as a comparator is now considered unethical, new therapies are introduced into the clinic superimposed upon background therapy, typically methotrexate.
Mechanisms for reducing delay based on look-ahead logic within individual comparators and mechanisms based on multiplexor architectures of a comparator are compared for both propagation delay and area.
We found that decreases in SNR due to leakage and thermal noise in a comparator were independent of the sampling frequency.
MMX mesalazine users not matched to a comparator were excluded from the propensity-matched set.
A comparator was successfully identified for 4,364 users (the remaining 440 metformin users for whom comparators could not be found were excluded).
Use of physician diagnosis as a comparator was therefore a limitation as individual physicians appeared to use a different set of criteria to diagnose VAP.
