Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Generating sawtooth or triangular output
Reexamination Certificate
2008-07-14
2010-06-29
Nguyen, Hai L (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Generating sawtooth or triangular output
C327S137000
Reexamination Certificate
active
07746130
ABSTRACT:
A triangular wave generating circuit includes: an integrating unit including a capacitor, the integrating unit having an output for providing a triangular wave signal; first and second constant current sources for charging and discharging the capacitor; a switch unit for coupling the first and second current sources to the integrating unit to charge and discharge the capacitor in response to an internal clock signal; a high/low level limiter including first and second comparing units for comparing the output of the integrating unit with upper and lower triangular wave peak limit reference voltages, respectively, and providing output signals indicating when the output of the integrating unit coincides with the peak limit reference voltages; a clock generator for providing the internal clock signal in response to the comparing unit output signals; and means for varying a peak-to-peak swing of the triangular wave signal over time to synchronize the internal clock signal with an externally supplied clock pulse.
REFERENCES:
patent: 4240036 (1980-12-01), Kohler
patent: 5077539 (1991-12-01), Howatt
patent: 6211728 (2001-04-01), Chen et al.
patent: 6262632 (2001-07-01), Corsi et al.
patent: 6545533 (2003-04-01), Karki et al.
patent: 6614297 (2003-09-01), Score et al.
patent: 6791405 (2004-09-01), Tsuji et al.
patent: 6847257 (2005-01-01), Edwards et al.
patent: 6956431 (2005-10-01), Maejima
patent: 7135922 (2006-11-01), Zepp
patent: 7161421 (2007-01-01), Honda
patent: 7183818 (2007-02-01), Tsuji
patent: 7279966 (2007-10-01), Krishnan et al.
patent: 7339425 (2008-03-01), Yang
patent: 7403049 (2008-07-01), Uchimoto et al.
patent: 7642820 (2010-01-01), Chen et al.
patent: 2004/0232978 (2004-11-01), Easson et al.
Duane Morris LLP
Elite Semiconductor Memory Technology Inc.
Nguyen Hai L
LandOfFree
Triangular wave generating circuit having synchronization... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Triangular wave generating circuit having synchronization..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Triangular wave generating circuit having synchronization... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4218732