Internal voltage generator
AssigneeHynix Semiconductor Inc.
InventorChang-Ho Do
Life of this patent
Estimating the term…
Abstract
An internal voltage generator includes a pull-up driver to pull-up drive a supply terminal of an internal voltage, a pull-down driver to pull-down drive the supply terminal of the internal voltage, a pull-up driving control unit to turn on the pull-up driver when a first feedback voltage corresponding to the internal voltage becomes lower than a reference voltage, and a pull-down driving control unit to turn on the pull-down driver when a second feedback voltage becomes higher than the reference voltage, the second feedback voltage having a voltage level corresponding to that of the internal voltage and lower than that of the first feedback voltage.
Claims16
An internal voltage generator, comprising:
- a pull-up driver to pull-up drive a supply terminal of an internal voltage;
- a pull-down driver to pull-down drive the supply terminal of the internal voltage;
- a pull-up driving control means to turn on the pull-up driver when a first feedback voltage corresponding to the internal voltage is lower than a reference voltage;
- and
- a pull-down driving control means including:
- a test unit to generate selection signals, the test unit including a signal generating unit to generate a plurality of test signals and a decoding unit to enable one of the selection signals by decoding the plurality of test signals, the signal generating unit including first to Nth signal generating units to either enable a corresponding test signal by sensing an address input in a test mode, or to enable the corresponding test signal regardless of inputs when a fuse option is set up;
- a feedback unit to transfer a voltage level selected from a plurality of voltage levels corresponding to the internal voltage to a second feedback voltage in response to the selection signals;
- and
- a control signal generating unit to turn on the pull-down driver when the second feedback voltage level is higher than that of the reference voltage.
An internal voltage generator, comprising:
- a pull-up driving control circuit configured to control a pull-up driver to perform a pull-up operation when a first feedback voltage corresponding to an internal voltage is lower than a reference voltage;
- and
- a pull-down driving control circuit comprising:
- a test unit to generate selection signals;
- a feedback unit to transfer one voltage level selected from a plurality of voltage levels generated by dividing the internal voltage as a second feedback voltage in response to the selection signals when a driving off signal is disabled;
- and
- a control signal generating unit configured to control a pull-down driver to perform a pull-down operation when a level of the second feedback voltage is higher than that of the reference voltage,
- wherein the driving off signal is disabled by becoming synchronized by a command including an active command which causes a high level of internal voltage power consumption, and enabled by becoming synchronized by a command including a pre-charge command which causes a substantially low level of internal voltage power consumption.
Dependencies are inferred from the claim text.