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. 10, 2002
Filed:
Mar. 01, 2001
Michael F. Taylor, Mpls, MN (US);
Teck-Shiun Lim, Brooklyn Park, MN (US);
Teradyne, Inc., Boston, MA (US);
Abstract
A high-accuracy linear amplifier is disclosed for sinking or sourcing current to or from a load. The linear amplifier includes input circuitry for receiving a predetermined input signal and rectifier circuitry. The rectifier circuitry is disposed at the output of the input circuitry and is operative in response to the input signal to generate a source/sink command signal. Output stage circuitry is coupled to the rectifier circuitry and includes a current sink transistor and a current source transistor. The output stage circuitry is responsive to the command signal to sink or source current through one of the respective transistors. The amplifier further includes feedback circuitry coupled between the output of the output stage circuitry and the input circuitry to provide an error signal for modifying the input signal. Bias circuitry maintains the non-conducting transistor in an on state during the sourcing or sinking of current.