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. 09, 1984
Filed:
Nov. 22, 1982
Applicant:
Inventors:
Daniel Gaudin, Paris, FR;
Philippe Le Gars, Paris, FR;
Assignee:
Thomson-CSF, Paris, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B / ; H04B / ; H03H / ;
U.S. Cl.
CPC ...
455115 ; 455129 ; 333 / ; 343860 ;
Abstract
A device for detecting the optimum anode load impedence of a transmitter tube in a high frequency transmission chain. A phase shift circuit phase shifts by k.pi./2 (with k being a positive or negative uneven integer) the phase difference between the input and output voltages of the tube. The phase shifted voltages are multiplying together in a circuit, and the mean value of the product is then calculated. Cancellation of this mean value corresponds to the anode load impedance passing through a purely resistive value. Thus, the circuit allows the phase matching detection to be made, which is independent of any modulus matching detection.