Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Synchronizing
Patent
1998-06-15
2000-04-04
Tran, Toan
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Synchronizing
327 77, 327 89, H03L 700, H03K 522
Patent
active
060466154
ABSTRACT:
A level detection circuit for monitoring the level of a power supply voltage and producing an output signal at power on for resetting various system elements powered by the supply voltage when the supply voltage reaches a predetermined level. The detection circuit, which is powered by the supply voltage includes a voltage reference circuit which produces a reference voltage having a magnitude which is relatively independent of the power supply voltage. A translator circuit functions to produce a translated voltage indicative of the supply voltage magnitudes and which is comparable in magnitude to the reference voltage when the supply voltage is at a suitable level such that the system will accept a power on reset pulse. A comparator circuit functions to compare the reference voltage with the translated voltage and cause an associated output circuit to issue the reset pulse. The reset circuit typically includes a one shot circuit, the output of which is logically ORed with the amplified comparator output. The amplified comparator output functions to hold the system elements in a reset state at very low supply voltages and the one shot output functions to reset the system elements once the supply voltage is at a sufficiently high level.
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Briner Michael S.
Chevallier Christophe J.
Roohparvar Frankie F.
Micro)n Technology, Inc.
Tran Toan
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