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:
May. 09, 2006
Filed:
Mar. 21, 2005
Gabriele Manganaro, Boxborough, MA (US);
Gabriele Manganaro, Boxborough, MA (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
A current source cell includes a current source providing a first current where the first current can be calibrated, first and second switches coupled to steer the first current to respective first and second output terminals in response to respective first and second control signals, and a latch circuit generating the first and second control signals. The latch circuit drives the first and second control signals to a first logical state to cause the first and second switches to open. The first current is then calibrated. After calibration, the latch circuit drives the first and second control signals to have logical states that correspond to a data signal as triggered by a clock signal where the first and second control signals have inverse logical states. One of the first and second switches is closed to steer the first current to a respective one of the first and second output terminals.