To provide a circuit and a system for ramping a voltage across a load (506).
This circuit and the system include a charging circuit (500) for charging a capacitor (501) to generate a ramp-up waveform. A circuit (511) selectively decouples a first driver (510) from the load (506) during a ramp up mode and couples the first driver (510) to the load (506) during a normal operation mode. A ramp-up driver (507a) is selectively coupled to the load (506) during the ramp-up mode for ramping up the voltage across the load (506) in response to the ramp-up waveform generated by the charging circuit (500). A discharging circuit (503d, 514a, b) discharges the capacitor (501) to generate a power-down waveform. The circuit (511) selectively decouples the first driver (501) from the output load (506) during the ramp-down of the voltage across the output load (506).
COPYRIGHT: (C)2007,JPO&INPIT
WELSER JOSEPH JASON
SUBRAMANIAM KRISHNAN
Hajime Asamura
Hayashi Zouzo
Kuniaki Shimizu