Power-on-Reset and Supply Brown Out Detection Circuit with Programmability
AssigneeSTMicroelectronics International N.V.
InventorsPralay Mandal, Sajal Kumar Mandal
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Abstract
A low-power wideband Power-on-Reset (PoR) and supply brown out detection circuit is proposed, wherein a technique for accurately controlling the PoR trip points and hysteresis voltage is presented. The PoR circuit includes a CMOS circuit with asymmetric rise and fall delays for monitoring wideband supply voltage transients including supply brown out. Being a non-bandgap and non-comparator based circuit, it consumes a very small power and Si area.
Claims39
A low-power wideband Power-on-Reset (PoR) and supply brown out detection device comprising:
- a first circuit configured to set programmable trip points;
- and
- a second circuit configured to set a programmable hysteresis voltage.
The device as set forth in 9, wherein the upper trip point signal and the lower trip point signal provide negative feedback to produce the reference voltage when the active low internal reset signal remains stable at a low or a high state.
Dependencies are inferred from the claim text.