Oscillators – Ring oscillators
Reexamination Certificate
2010-03-25
2011-11-01
Pascal, Robert (Department: 2817)
Oscillators
Ring oscillators
C331S049000, C331S074000, C331S172000, C324S227000, C324S260000
Reexamination Certificate
active
08049570
ABSTRACT:
An electrical/magnetic current sensing system includes a first collection mechanism configured to convert an electric field into surface charge, a second collection mechanism comprising a magnetic reactive material, and a sensor coupled to the first and second collection mechanisms. The sensor comprises an odd number, greater than or equal to three, of unidirectionally-coupled non-linear over-damped bi-stable elements. Each element comprises a resistive load, an operational transconductance amplifier (OTA) with a bipolar junction transistor differential pair, a cross-coupled OTA, and a non-linear OTA. Each element may comprise fully differential inputs and outputs. The sensor may be contained in a microchip or on a printed circuit board. A resident time difference readout device may be connected to the sensor, and may be configured to perform a power spectral density calculation. The sensor may include a resistance to voltage circuit connected between the second collection mechanism and the elements.
REFERENCES:
patent: 6222423 (2001-04-01), Sudjian
patent: 6880400 (2005-04-01), Fogliatti et al.
patent: 7109918 (2006-09-01), Meadows et al.
patent: 7196590 (2007-03-01), In et al.
patent: 7420366 (2008-09-01), In et al.
patent: 7528606 (2009-05-01), In et al.
In, Visarath et al., Coupling-Induced Oscillations in Overdamped Bistable Systems, Physical Review E., 68, 045102 (R), 2003.
Bulsara, Adi et al., Emergent Oscillations in Unidirectionally Coupled Overdamped Bistable Systems, Physical Review E, 70, 036103, 2004.
In, Visarath et al., Complex Behavior in Driven Unidirectionally Coupled Overdamped Duffing Elements, Physical Review E, 73, 066121, 2006.
In, Visarath et al, Complex Dynamics in Unidirectionally Coupled Overdamped Bistable Systems Subject to a Time-Periodic External Signal, Physical Review E 72, 04510R, 2005.
Longhini, Patrick et al., Exploiting Dynamical Symmetry in Coupled Nonlinear Elements for Efficient Frequency Down-Conversion, Physical Review E, 76, 02620, 2007.
In Visarath
Kho Yong (Andy) An
Liu Norman
Longhini Patrick
Neff Joseph D.
Eppele Kyle
Friedl Ryan J.
Gannon Levi
Pascal Robert
The United States of America as represented by the Secretary of
LandOfFree
Coupled bi-stable microcircuit system for ultra-sensitive... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Coupled bi-stable microcircuit system for ultra-sensitive..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coupled bi-stable microcircuit system for ultra-sensitive... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4260740