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:
Oct. 08, 1985
Filed:
Jul. 05, 1983
Thomas P Coursolle, St. Paul, MN (US);
Rosemount Inc., Eden Prairie, MN (US);
Abstract
An electrical circuit provides an output signal having a frequency representative of an input signal which has a fundamental frequency responsive to a parameter. The circuit has an amplifier having an adjustable amplitude response with an input coupled to the input signal and an output for providing the output signal as a function of the input signal. A filter is coupled to the amplifier and to the output signal for at least partially determining the amplitude response of the amplifier. The filter has an adjustable rolloff frequency characteristic. An adjustable impedance is coupled to the filter to adjust the amplitude response of the amplifier and adjust the rolloff frequency characteristic of the filter as a function of the input signal. A controller is coupled to the output signal and provides a control signal for adjusting the adjustable impedance and hence the amplitude response of the amplifier and the rolloff frequency characteristic of the filter as a function of the output signal.