Comparing device having hysteresis characteristics and voltage regulator using the same
AssigneeDongbu HiTek Co., Ltd.
InventorJae-Hyeak Son
Life of this patent
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Abstract
Embodiments include a comparing device having hysteresis characteristics and a voltage regulator using the same. The voltage regulator includes a comparator which compares a comparison voltage with a reference voltage and outputs a result of the comparison, a switching controller which generates a plurality of switching signals in response to the comparison result, resistors connected in the form of a string to divide the comparison voltage into a plurality of voltages, and a switching box which selects one of the plural voltages as the comparison voltage in response to the switching signals.
Claims20
A comparing device having hysteresis characteristics comprising:
- a comparator which compares a comparison voltage with a reference voltage and outputs a result of the comparison;
- a switching controller which generates a plurality of switching signals in response to the comparison result;
- resistors connected in the form of a string to divide the comparison voltage into a plurality of voltages;
- and
- a switching box which selects one of the plural voltages as the comparison voltage in response to the switching signals.
A voltage regulator using a comparing device having hysteresis characteristics, the voltage regulator comprising:
- an error amplifier which compares a reference voltage with a feedback voltage and outputs a result of the comparison as an error value;
- a pass transistor which passes an input voltage as an output voltage in response to the error value;
- a level adjuster which adjusts a level of the output voltage passed by the pass transistor and outputs the level-adjusted voltage as the feedback voltage;
- a comparator which compares the reference voltage with a comparison voltage corresponding to the feedback voltage output from the level adjuster;
- a switching controller which generates a plurality of switching signals in response to a result of the comparison executed by the comparator;
- resistors connected in the form of a string to divide the comparison voltage into a plurality of voltages;
- a switching box which selects one of the plural voltages as the comparison voltage in response to the switching signals;
- and
- a level shifter which shifts a level of a digital input control voltage received from an outside of the voltage regulator and outputs the level-shifted input control voltage to the switching controller.
Dependencies are inferred from the claim text.