Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Particular stable state circuit
Reexamination Certificate
2005-07-19
2005-07-19
Tra, Quan (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Particular stable state circuit
C327S143000
Reexamination Certificate
active
06919747
ABSTRACT:
A circuit for use with a pulse width modulated integrated circuit having a soft-start reset function comprising a diode having a first terminal connected to a soft-start reset terminal of the integrated circuit, a voltage divider coupled between a voltage reference and a common terminal for the integrated circuit, the diode having a second terminal coupled to a tap of the voltage divider and a soft-start capacitor coupled between the second terminal of the diode and the common terminal whereby upon power startup of the integrated circuit, the soft-start capacitor is charged by the tap of the voltage divider and wherein in the event of a single event upset condition, when the soft-start reset terminal of the integrated circuit is reduced to a level at or near the level of the common terminal of the integrated circuit, the diode prevents the soft-start capacitor from discharging through the integrated circuit.
REFERENCES:
patent: 4321554 (1982-03-01), Quilter
patent: 4686616 (1987-08-01), Williamson
International Rectifier Corporation
Ostrolenk Faber Gerb & Soffen, LLP
Tra Quan
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