Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2009-12-21
2011-10-25
Zweizig, Jeffrey (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
C327S143000
Reexamination Certificate
active
08044708
ABSTRACT:
A reference voltage generator includes: a reference voltage source1that generates a direct-current voltage that is used as a reference; a low-pass filter2that is connected to an output node of the reference voltage source; a first voltage buffer circuit10with an input terminal to which the output node of the reference voltage source is connected and an output terminal to which an output node of the low-pass filter is connected, which has a voltage gain of one time; and a hysteresis comparator11with one input terminal to which the output node of the reference voltage source is connected and an other input terminal to which the output node of the low-pass filter is connected. At start-up, during a time period in which a voltage difference between an output of the reference voltage source and an output of the low-pass filter exceeds a predetermined value, an output impedance of the first voltage buffer circuit is controlled based on an output signal of the hysteresis comparator. At start-up, the low-pass filter that reduces noise is charged with a low impedance rapidly, and thus an output voltage can be stabilized rapidly.
REFERENCES:
patent: 5859563 (1999-01-01), Yung et al.
patent: 5886565 (1999-03-01), Yasui et al.
patent: 5889392 (1999-03-01), Moore et al.
patent: 5892381 (1999-04-01), Koifman et al.
patent: 5959439 (1999-09-01), Shenai et al.
patent: 7362081 (2008-04-01), Huang
patent: 6-301429 (1994-10-01), None
patent: 8-272461 (1996-10-01), None
patent: 2002-023870 (2002-01-01), None
patent: 2005-346522 (2005-12-01), None
Hamre Schumann Mueller & Larson P.C.
Panasonic Corporation
Zweizig Jeffrey
LandOfFree
Reference voltage generator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Reference voltage generator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reference voltage generator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4255204