If the temperature is below setpoint, the output will be on longer; if the temperature is too high, the output will be off longer. The third controller type provides proportional with integral and derivative control, or PID.
Amplifier figures of merit. In electronics, the figures of merit of an amplifier are numerical measures that characterize its properties and performance. Figures of merit can be given as a list of specifications that include properties such as gain, bandwidth, noise and linearity, among others listed in this article. Figures of merit are important for determining the suitability of a particular amplifier for an intended use.
This means that if you are firing a rifle that produces 140 dB and the hearing protection that you have on has an NRR 33 dB, the level of noise exposure is not reduced to 103 dB. To determine how much noise exposure is reduce, deduct 7 from the NRR on the device and divide the result by two.