Other computing elements include analog multipliers, nonlinear function generators, and analog comparators. Analog modules include ADCs, DACs, operational amplifiers, and analog comparators. Other uses include subtractors, comparators, and controlled inverters. High speed comparators use transistors with larger aspect ratios and hence also consume more power. These comparators make it possible to add a programmable hysteresis without feedback or complicated equations. Comparators can be used to create absolute value detectors. Open drain comparators are more suitable for mixed-voltage system design. Comparators can also be used as window detectors. The output of both comparators is fed through an AND gate. Voting comparators with a transmitter keying matrix are sometimes used to connect incompatible base stations. Two were considered "failed" trials, as comparators of established efficacy failed to differentiate from placebo. A flash converter requires formula 1 comparators for an "n"-bit conversion. These comparators are 32- or 64-bit-wide. It demonstrates this effect in a dose-dependent manner, with 10-fold potency to three comparators. A sorting network consists of two types of items&colon; comparators and wires.