Oscillator for DC-DC converter
AssigneeLG Electronic Inc.
InventorJong-Hyug Bae
Life of this patent
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Abstract
An oscillator for a DC-DC converter, which is able to obtain constant frequency by using trans conductance value as a clock of the DC-DC converter to make an output insensitive for process changes, comprises: a trans conductance unit calculating trans conductance value according to input voltage, deciding and outputting current according to the input voltage; a capacitor charged by the current outputted from the trans conductance unit; and an amp-type Schmitt trigger comparing the voltage charged in the capacitor to threshold voltage, and outputting the compared value.
Claims16
An oscillator for a DC-DC converter comprising:
- a trans conductance unit calculating trans conductance value according to input voltage, deciding and outputting current according to the input voltage;
- a capacitor charged by the current outputted from the trans conductance unit;
- and
- an amp-type Schmitt trigger comparing the voltage charged in the capacitor to threshold voltage, and outputting the compared value.
An oscillator of a DC-DC converter comprising:
- a trans conductance unit for outputting positive current or negative current according to conductance value which is set in advance corresponding to input voltage;
- a capacitor charged by output current from the trans conductance unit;
- a comparing unit comparing the voltage inputted from the capacitor to threshold voltage and outputting current of corresponding level after inverting it;
- and
- an inverter for inverting the output signal of the comparing unit and outputting it into the trans conductance unit and to the DC-DC converter.
Dependencies are inferred from the claim text.