DEVICE FOR PRODUCING A SIGNAL HAVING A SUBSTANTIALLY TEMPERATURE-INDEPENDENT FREQUENCY

摘要

The invention concerns a device (1) comprising a mixer (4) producing a signal (S4) having a frequency (F4) equal to the difference between two frequencies (F2, F3) which are those of the two signals (S2, S3) each produced by a generator (2, 3) and which vary parabolically depending on the temperature (T) with quadratic coefficients ( beta 1, beta 2) different from each other. In order to make the frequency (F4) of the signal (S4) produced by the mixer (4) at least substantially independent of temperature (T), the generators (2, 3) are so designed that the relationship of the quadratic coefficients ( beta 1, beta 2) is equal to the inverse relationship of the values (F2r, F3r) which the corresponding frequencies (F2, F3) have at a predetermined temperature (Tr).