Patent
1975-10-06
1977-06-07
Claffy, Kathleen H.
H04B 336, H04B 316
Patent
active
040285057
ABSTRACT:
A negative impedance repeater for amplification in telephone lines operating at voice frequency comprises two converters, one of them stable with open terminals and the other stable with short-circuited terminals; each converter is loaded by a fixed network of passive impedances chosen according to the characteristic impedance of the line to be amplified, and provided with means, external to the network of passive impedances, for adjusting the feedback, and consequently the conversion ratio. The conversion ratios of the two converters may be varied independently from each other so that in the case of loaded lines their product may be kept always constant and this allows to adjust the repeater gain without modifying its impedance, while for unloaded lines it is possible to obtain that such product increases with a certain law by increasing gain, and this fact causes an equalization at the highest frequencies of the band, which is necessary for this type of lines.
REFERENCES:
patent: 2855575 (1958-10-01), Tamburelli
patent: 2998581 (1961-08-01), Dimmer
patent: 3024324 (1962-03-01), Dimmer
patent: 3042759 (1962-07-01), Bonner
patent: 3551838 (1970-12-01), Valfre
patent: 3684975 (1972-08-01), Valfre
patent: 3814866 (1974-06-01), Japenga
patent: 3860767 (1975-01-01), Boucher et al.
patent: 3867589 (1975-02-01), Junek
patent: 3927280 (1975-12-01), Gupta et al.
Claffy Kathleen H.
Myers Randall P.
LandOfFree
Negative impedance repeater for telephone lines does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Negative impedance repeater for telephone lines, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Negative impedance repeater for telephone lines will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1238121