Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Reexamination Certificate
2007-04-02
2010-11-02
Behm, Harry (Department: 2838)
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
C323S280000, C323S312000
Reexamination Certificate
active
07825644
ABSTRACT:
A system and method are disclosed for providing a pulsating current output having ultra fast rise and fall times. A linear constant current controller is provided that comprises an operational amplifier. A compensation capacitor is connected to an output of the operational amplifier through a switch circuit. The switch circuit closes to initially charge up the compensation capacitor. The switch circuit then opens to isolate the compensation capacitor when the output of the operational amplifier is connected to ground. A value of voltage is maintained on the compensation capacitor so that the compensation capacitor does not need to be recharged for each subsequent cycle of the pulsating current output. The linear constant current controller is capable of generating a pulsating output current that has rise and fall times in the tens of nanoseconds.
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Behm Harry
National Semiconductor Corporation
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