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. 04, 1987
Filed:
May. 17, 1985
James H Doyle, Orange, CA (US);
Other;
Abstract
An automatic equalizer for an electronic measuring instrument using a transducer to measure a physical quantity. A signal amplifier in the instrument has a positive feedback application point and a negative feedback application point. The automatic equalizer has a plurality of stages, each comprising an amplifier that draws its input from the compensated output of the signal amplifier. Each equalizer stage is biased to operate over a different range of output signal levels, and the amount of feedback supplied by each stage back to the positive and negative feedback application points is separately adjustable so as to equalize a different segment of the transducer response curve. The required bias signal level for each equalizer is independent of the response characteristics of the transducer and therefore can be determined solely with reference to the range of magnitudes of the output signal.