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:
Jul. 21, 1992
Filed:
Mar. 26, 1991
Klaus Danzeisen, Grafelfing, DE;
Abstract
In an analyzer for measuring the frequency characteristics of quadripoles, comprising an indicator circuit in which the output of the quadripole to be measured is converted to an intermediate frequency by a mixer and a frequency-variable local oscillator, and comprising a variable-frequency second local oscillator whose output frequency is mixed with another mixer and with the frequency of the local oscillator to be converted to an input signal for the quadripole to be measured, the output frequency of the variable frequency second local oscillator is adjusted to be offset by at least .+-.5 MHz relative to the intermediate frequency value of the indicator circuit.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile