| 摘要 |
The invention relates to a time base comprising two oscillators, the frequency of one of which is lower than the other, the latter being intermittently attenuated, generating a first time reference (REF) with the same intermittence, stable by difference between the frequencies of the two oscillators, a second permanent time reference (RTC) being obtained by division of the frequency of the oscillator with the lowest frequency and the factor for the division being a function of the pulses counted for the first oscillator (OSC1) during a time interval determined by the first stable time reference (REF). |
