| 摘要 |
A crystal-controlled oscillator whose frequency is regulated as a function of temperature and having a feedback loop with a capacitor whose capacitance is electrically variable, to which capacitor a variable electrical compensating signal varying in accordance with a third-degree law as a function of temperature, is applied. The compensating circuit in accordance with the invention produces a signal of this kind at its terminals by three units respectively comprising three thermistors RT1, RT2, RT3, each unit being specifically designed to create the signal corresponding to a given arcuate portion of the total graph function. The applications are in particular in the field of portable radio transmitters. |
