Temperature stabilisation circuit for HF amplifier

摘要

The circuit receives a spectral signal which is fed via an input (1) through a transformer (4) to the output. The transformer is formed from windings (2,3) and a core. The losses in the transformer increase with frequency and are compensated for by a capacitor (6) positioned between the input and the output. As the temperature changes, the value of a resistance (7) changes and the voltage dropover of the winding is changed according to the frequency due to the resistance (8) and the capacitor. The magnitude of the signals on the winding (3) passed to the output (5) follow the complex thermal and spectral characteristics of the coil.