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:
Aug. 29, 2006
Filed:
Dec. 10, 2004
Zibing Yang, Natick, MA (US);
Todd A. Hinck, Arlington, MA (US);
Howard I. Cohen, Waltham, MA (US);
Allyn Hubbard, Medfield, MA (US);
Zibing Yang, Natick, MA (US);
Todd A. Hinck, Arlington, MA (US);
Howard I. Cohen, Waltham, MA (US);
Allyn Hubbard, Medfield, MA (US);
The Trustees of Boston University, Boston, MA (US);
Abstract
A tunable current mode integrator for low-frequency continuous-time filters that requires a reduced amount of area when implemented in an integrated circuit (IC). The integrator includes input and output transistors, and cross-coupled current mirrors, integration capacitors, and operational transconductance amplifiers (OTAs) that form a feedback structure with the input transistors. Input currents are converted to small current swings within the OTAs, and are subsequently integrated by the capacitors. Resulting integrated voltages are converted to output currents by the output transistors.