SU17389A1 - Modify the telephone translation - Google Patents

Description

Patent No. 3226 describes a telephone translation based on a differential method using two amplifying lamps operating in two different directions and with two differential transformers connected to the anode transformers and the grid of amplifying lamps. An artificial line is included in the anode transformer circuit of one and the grid of another lamp.

.-, The proposed invention is a modification of the above translation, in which. The line is closed on the secondary winding of the differential transformer and is designed so that the feedback between the amplifying lamps is eliminated. -.

The drawing shows a diagram of this telephone translation,. in which HJIi or, respectively, IL2 artificial lines, closed to the corresponding secondary differential transformers 77 and MTz. Conversable liii JIi and, JIz with the help of one transformer (for each case) are connected with artificial lines, respectively, and I / 72 - N are connected between the middle points and

-; .-: ..: g,

transformers MT and MT and the middle points of the circuits of transformers AT2

and, respectively, CTz and -4Г, .h

Artificial with respect to

to the resistance of the current source, beside. gain is calculated so that

the possibility of feedback is eliminated

between amplifying lamps.

Current, PREVIOUS with any LIG:

SRI. amplified by a lamp and transmitted through a transformer to the second line), without affecting the grid transformer of another lamp, amplifying in another direction, due to which duplex action is possible,

The subject of the patent.

Modification of the telephone translation described in Co 3226, characterized in that the artificial HJIi line (or the corresponding //a) is closed to the secondary winding of the differential transformer MT / (or DGH) and so calculated with respect to the source impedance of the body to be amplified so that the feedback between the amplifying lamps, and the Jfi line (or