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US 11,309,885 B2Granted
Power-on reset signal generating device
AssigneeSK hynix Inc.
InventorHyun Chul Lee
Life of this patent
Estimating the term…
Abstract
A power-on reset signal generating device includes a reference voltage generator, a signal driver, and a stabilization circuit. The reference voltage generator generates a power-on reference voltage based on a voltage level of a power supply voltage. The signal driver drives the power-on reference voltage to generate a power-on reset signal. The stabilization circuit receives the power-on reset signal to keep a voltage level of the power-on reference voltage staying during a predetermined amount of time.
Claims10
A power-on reset signal generating device comprising:
- a reference voltage generator configured to change a voltage level of a power-on reference voltage to a first logic level when a power supply voltage rises to reach a target voltage level or higher voltage level, and configured to change a voltage level of the power-on reference voltage to a second logic level when the power supply voltage falls under the target voltage level;
- a signal driver configured to drive the power-on reference voltage to generate a power-on reset signal;
- a discharge control circuit configured to enable a discharge control signal during a predetermined amount of time when the power-on reset signal is enabled;
- a charge control circuit configured to enable a charge control signal during the predetermined amount of time when the power-on reset signal is disabled;
- and
- a voltage driver configured to drive the power-on reference voltage to a ground voltage based on the discharge control signal, and to drive the power-on reference voltage to the power supply voltage based on the charge control signal.
3 more elements
A power-on reset signal generating device comprising:
- a reference voltage generator configured to generate a power-on reference voltage based on a voltage level of a power supply voltage;
- a signal driver configured to drive the power-on reference voltage to generate a power-on reset signal;
- a discharge control circuit configured to enable a discharge control signal during a predetermined amount of time when the power-on reset signal is enabled;
- a charge control circuit configured to enable a charge control signal during the predetermined amount of time when the power-on reset signal is disabled;
- and
- a voltage driver configured to drive the power-on reference voltage to a ground voltage based on the discharge control signal, and to drive the power-on reference voltage to the power supply voltage based on the charge control signal.
3 more elements
Dependencies are inferred from the claim text.