Patent ID: 11877053
Assignee: OLYMPUS CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  A  G | IPC G  H

Claim 0:
1. A booster apparatus comprising
a voltage conversion control circuit configured to generate second power supply voltage having lower negative voltage than ground voltage, based on the ground voltage, first power supply voltage having higher voltage than the ground voltage, and a driving clock signal supplied from outside, the voltage conversion control circuit including:
a booster circuit configured to generate the second power supply voltage by boosting a predetermined level of voltage that is input from outside, at an absolute value level based on an input booster clock signal;
a clock buffer configured to maintain the second power supply voltage at a predetermined level, generate the booster clock signal based on the driving clock signal, and output the generated booster clock signal to the booster circuit; and

a voltage comparator that includes:
a first voltage generation circuit configured to generate a first signal with a first voltage level based on the first power supply voltage and the second power supply voltage;
a second voltage generation circuit configured to generate a second signal with a second voltage level based on the first power supply voltage and the ground voltage; and
a comparison circuit configured to compare the first voltage level and the second voltage level and control input of the driving clock signal to be supplied to the clock buffer based on a comparison result.