The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 13, 2005
Filed:
Jun. 05, 2003
Gregory Alan Arlow, Southampton, NJ (US);
Gregory Alan Arlow, Southampton, NJ (US);
Lockhead Martin Corporation, Bethesda, MD (US);
Abstract
A current source modulator () provides power to radar transmitters. The modulator comprises a power supply () providing, when enabled, a known current to a storage capacitor (). A comparator circuit () provides a signal (V) when voltage (V) across the storage capacitor () falls a reference voltage, and an enable circuit () responds to the comparator signal (V) and an ON command signal to enable the power supply (). The modulator () further includes a network (N) associated with the comparator circuit () to retain the value of the signal (provide hysteresis) when the voltage across the storage capacitor is above the reference voltage. The modulator () may include a second network (N) associated with a second comparator circuit, operable to retain a second signal when capacitor () voltage Vis above a reference voltage. In this aspect, there is a rapid charge and a trickle charge that reduces any charging overshoot.