Internal voltage generating circuit capable of controlling swing width of detection signal in semiconductor memory apparatus
AssigneeSK hynix Inc.
InventorMIN SEOK CHOI
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Abstract
An internal voltage generating circuit capable of controlling a swing width of a detection signal in a semiconductor memory apparatus is provided. The internal voltage generating circuit of a semiconductor memory apparatus includes an internal voltage level detecting unit configured to compare an internal voltage with a target voltage and then generate a detection signal, and an internal voltage level control unit configured to control the internal voltage based on a voltage level of the detection signal, wherein the internal voltage level detecting unit is configured to control a swing width of the detection signal based on a voltage difference between the internal voltage and the target voltage.
Claims4
An internal voltage generating circuit of a semiconductor memory apparatus comprising:
- a comparison unit configured to generate a preliminary detection signal by comparing an internal voltage with a reference voltage;
- an A/D converting unit configured to generate a code based on the internal voltage;
- a code voltage generating unit configured to output a code voltage corresponding to the code;
- a code detection unit configured to generate a control signal which is enabled when a value of the code is lower than a predetermined code value;
- a control-voltage-level controlling unit configured to output a control voltage which is at a ground voltage level when the control signal is enabled and to output the control voltage corresponding to the code voltage when the control signal is disabled;
- a driving unit configured to output a detection signal by receiving an external voltage and the control voltage as driving voltages and then driving the preliminary detection signal;
- and
- an internal voltage level control unit configured to increase the internal voltage as a voltage level of the detection signal is lowered.
Dependencies are inferred from the claim text.