Digital buck-boost conversion circuit and method of operating the same

摘要

A digital buck-boost conversion circuit includes an analog-to-digital converter configured to convert an output voltage signal into a digital signal, a pulse period control block configured to output a pulse period control signal based on degrees of scattering at different frequencies of the digital signal, a pulse generation block configured to output a pulse based on the pulse period control signal, and a buck-boost converter configured to convert the pulse into the output voltage signal.

主权项

1. A digital buck-boost conversion circuit comprising:
an analog-to-digital converter configured to convert an output voltage signal into a digital signal; a pulse period control block configured to output a pulse period control signal based on degrees of scattering at different frequencies of the digital signal; a pulse generation block configured to output a pulse based on the pulse period control signal; and a buck-boost converter configured to convert the pulse into the output voltage signal, wherein the pulse period control block includes,
a first sensing circuit configured to measure voltage levels of the digital signal at each of the different frequencies and store the measured values in a memory;a calculation circuit configured to calculate the degrees of scattering at the different frequencies with the measured values stored in the memory; anda first control circuit configured to generate the pulse period control signal for controlling a period of the pulse based on the degrees of scattering.