Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Synchronizing
Reexamination Certificate
2007-06-06
2008-12-16
Lam, Tuan T (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Synchronizing
C327S077000, C327S081000, C327S088000
Reexamination Certificate
active
07466172
ABSTRACT:
Supply voltage level detectors are disclosed. The supply voltage level detector comprises a voltage source divider dividing a voltage source to generate a detection voltage, a bandgap reference voltage generator, a comparator comparing the detection voltage with a bandgap reference voltage generated by the bandgap reference voltage generator to determine if the voltage source is ready, a control circuit, and a forcing circuit. To ensure reliability of the comparison result, the control circuit disables the comparing device until the bandgap reference voltage is available. The forcing circuit is coupled to the output terminal of the comparing device and is controlled by the control circuit. When the comparing device is disabled, the forcing circuit forces the voltage level of the output terminal of the comparing device to a specific value indicating the voltage source is unready.
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patent: 2008/0143395 (2008-06-01), Frulio et al.
Lam Tuan T
Nguyen Hiep
Thomas Kayden Horstemeyer & Risley
Via Technologies Inc.
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