Temperature compensation circuit

摘要

Described is a temperature compensation circuit comprising a transistor, a device (to which compensated voltage is to be applied) connected to the collector, and a plurality of resistors forming a voltage divider. A node separates the resistors into two branches and is connected to the base, and a temperature sensor having a negative temperature coefficient of resistance is located in one of the branches. The branches are mutually adapted so that the ratio of the resistance of the branch containing the sensor to the sum of the resistances of both branches is a linear function of temperature. An application of this circuit to the control of the bias voltage supplied to an avalanche photodiode is specifically described.