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:
Feb. 21, 1989
Filed:
Jun. 12, 1986
Seppo Pyhalammi, Helsinki, FI;
Oy Nokia Ab, , FI;
Abstract
A method for adjusting the balancing impedance of a hybrid junction for maximization of the hybrid attenuation within the range between two operating frequencies, an upper and a lower one, when using a balancing impedance formed by two series-connected resistors (R.sub.1, R.sub.2) and a capacitor (C.sub.1) connected in parallel with one of said resistors. For the achievement of an optimal matching of the balancing impedance with the impedance of the line wo which the hybrid junction is connected to when all components of the balancing impedance are adjusted, the method according to the invention is effected in such a manner that (a) the first resistor (R.sub.1) is adjusted for the maximization of the hybrid attenuation at the upper frequency, (b) the capacitor (C.sub.1) is adjusted for the maximization of the hybrid attenuation at the upper frequency, (c) the second resistor (R.sub.2) is adjusted for the maximization of the hybrid attenuation at the lower frequency, (d) the first resistor (R.sub.1) is readjusted for the maximization of the hybrid attenuation at the lower frequency, (e) the second resistor (R.sub.2) is readjusted for the maximization of the hybrid attenuation at the lower frequency, and (f) the capacitor (C.sub.1) is readjusted for the maximization of the hybrid attenutation within the whole range of operating frequencies, with an eventual weighing of certain frequencies. (FIG. 8)