Patent ID: 11955877
Assignee: STMICROELECTRONICS S.R.L.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 17:
18. A system to provide an adapted sampling frequency for sampling an output voltage of a DC-DC power converter in a low power burst mode, the system comprising:
an oscillator configured to produce a clock signal;
a frequency-adaptation circuit configured to receive the clock signal and output an adapted clock signal comprising the adapted sampling frequency, the adapted sampling frequency being determined by a frequency-selection signal; and
a tracking circuit configured to receive data indicating when a burst for the low power burst mode is initiated and output the frequency-selection signal depending on the data, the tracking circuit comprising:
an up counter in communication configured to be incremented when bursts are initiated and reset when bursts are not initiated; and
a saturating up-and-down counter configured to receive an overflow signal from the up counter and increment a count each time the up counter overflows, and configured to decrement the count when up counter is reset twice consecutively, the count be provided to the frequency-adaptation circuit as the frequency-selection signal.