Temperature regulation by means of proportional pulses - uses two operational amplifiers, with two feedback circuits and bridge network

摘要

The temperature regulator can be used on most heating systems. It transforms the heat regulator into a proportional regulator. This being obtained by means of pulses. The pulses and the distance between pulses being determined by a simple analyser digital computer. The regulator is composed of two operational circuits. The first circuit (1) receives data from a measuring bridge. The bridge consists of a negative temperature resistance (2), a fixed or variable resistance (3) and a potentiometer (4). The gain of the first amplifier determines the temperature difference necessary for a variation from minimum to maximum of the pulse durations or the gap between pulses. The second operational amplifier (5) is connected so that it forms a peak signal generator driven by the variable voltage delivered by the first amplifier. This result is achieved by two feedback circuits, one delayed and the other non-delayed.