VOLTAGE DETECTION CIRCUIT

摘要

A voltage detection circuit includes a reference voltage and current supply configured to generate a reference voltage and a reference current; a switching element configured to shift from an off-state to an on-state when the reference voltage is higher than a predetermined threshold voltage; a current mirror circuit allowing a current corresponding to the reference current to flow through the switching element in the on-state; a capacitive element coupled in series to the current mirror circuit and charged with the current flowing through the switching element; and an inverter configured to output an enable signal activated based on a terminal voltage of the capacitive element.

主权项

1. A voltage detection circuit comprising:
a reference voltage and current supply configured to generate a reference voltage and a reference current; a switching element configured to shift from an off-state to an on-state when the reference voltage or a voltage generated by a voltage output circuit based on the reference voltage is higher than a predetermined threshold voltage; a current mirror circuit allowing a current corresponding to the reference current to flow through the switching element in the on-state; a capacitive element coupled in series to the current mirror circuit, and charged with the current flowing through the switching element; and an output circuit configured to output an enable signal activated based on a terminal voltage of the capacitive element.