A-LevelPhysicsD.C. circuitsOct/Nov 2020Paper 4 Q76 Marks
An ideal operational amplifier (op-amp) is to be used in a comparator circuit. Part of the comparator circuit is shown in Fig. 7.1. [Figure 7.1]. Three resistors, each of resistance 1000Ω, and a negative temperature coefficient thermistor are available to complete the circuit. The circuit is to be designed so that, at low temperatures, the output VOUT is –5.0V and at higher temperatures, the output VOUT is to be +5.0V.
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