Power on reset circuit
AssigneeWinbond Electronics Corp.
InventorsJyun-Yu Lai, Hsing-Yu Liu
Life of this patent
Estimating the term…
Abstract
A power on reset circuit includes a first inverting circuit, a second inverting circuit, a charging apparatus, an output buffer, a current drainer, and a first capacitor. The first inverting circuit and the second inverting circuit are coupled between a voltage detection end and a signal control end in opposite directions. The current drainer drains a current from the voltage detection end according to a power voltage and a voltage on the signal control end. The charging apparatus charges the voltage detection end according to the voltage on the signal control end. The output buffer generates a reset signal according to the voltage on the signal control end.
Claims13
A power on reset circuit, comprising:
- a first inverting circuit, having an input end coupled to a voltage detection end, an output end of the first inverting circuit coupled to a signal control end;
- a second inverting circuit, having an input end coupled to the signal control end, the second inverting circuit having an output end coupled to the voltage detection end;
- a current drainer, coupled to the voltage detection end, draining a current from the voltage detection end according to a power voltage and a voltage on the signal control end;
- a charging apparatus, coupled to the voltage detection end, charging the voltage detection end according the voltage on the signal control end;
- an output buffer, coupled to the signal control end, and generating a reset signal according to the voltage on the signal control end;
- and
- a first capacitor, coupled between the voltage detection end and the power voltage.
Dependencies are inferred from the claim text.