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. 18, 2001
Filed:
Jun. 22, 2000
John E. Carlson, Portland, OR (US);
Tektronix, Inc., Beaverton, OR (US);
Abstract
An output amplifier for a strobed sampling circuit has first and second operational amplifiers coupled to receive the sampled output from the sampling circuit. The operational amplifiers each have a RC circuit having a high ohmic value resistor that is coupled from its inverting input terminal to its output terminal. The non-inverting input terminals receive biasing voltages that are coupled to the sampling circuit. The gating strobes to the sampling circuit produces a DC current through the feedback resistor as a result of strobe pulses being integrated by the RC circuit. Respective electronic switches are coupled in parallel with the RC circuits of the operational amplifiers and are closed at a predetermined time interval after each strobe pulse to discharge the stored charge on the capacitors prior to the next strobe pulse. The output signals from the operational amplifiers are summed in a summing amplifier.