In voltage regulator with a power switch to alternately couple and decouple an input voltage source to an output terminal at a switching frequency, a current supply provides a current that is proportional to the input voltage, the capacitance of a ramp capacitor, and a switching frequency. To provide...http://www.google.com/patents/US5969513?utm_source=gb-gplus-sharePatent US5969513 - Switched capacitor current source for use in switching regulators
Switched capacitor current source for use in switching regulators
