Architecture for VBUS pulsing in UDSM processes
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United States of America Patent
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Apr 22, 2014
Grant Date -
Jun 4, 2009
app pub date -
Nov 29, 2007
filing date -
Nov 29, 2007
priority date (Note) -
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Abstract
Architecture for VBUS pulsing in an Ultra Deep Sub Micron (UDSM) process for ensuring USB-OTG (On The Go) session request protocol, the architecture being of the type wherein at least a charging circuit is deployed, uses a diode-means connected in a forward path of the charging circuit. The architecture might include a diode-divider including nodes and connected from VBUS in said charging circuit. One embodiment uses both charging and discharging circuits comprising transistors. The charging circuit transistor might comprise a PMOS transistor and the discharging circuit transistor might comprise a NMOS transistor. The architecture might include a three resistance string of a total resistance value approximating 100K Ohms connected between said VBUS and ground, wherein the discharging circuit transistor might comprise a drain extended NMOS transistor. The charging and discharging circuit transistors have VDS and VGD of about 3.6V, whereby high VGS transistors are not needed.
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