RADIO TERMINAL Russian patent published in 1998 - IPC

FIELD: radio engineering. SUBSTANCE: device has receiver and transmitter, which are connected by coaxial cable through antenna diode-capacitor switch to non-directed antenna. Goal of invention is achieved by amplifier, clock oscillator, converter of transmission channels, converter of receiving channels, digital-to-analog converter, unit of filters, ten remote terminals for radio operators. Converter of transmission channel has pulse counter, ten delay lines with zero-increment tuning for 10 ms, ten delay lines with step from 100 ms to 900 ms, nine flip-flops, OR gate, ten information pulse generators. Each information pulse generator has multivibrator, six AND gates, two memory registers, NOT gate, flip-flop, inverter, OR gate. Converter of receiving channels has nine flip-flops, nine NOT gates, ten AND gates and ten channel information generators. Each channel information generator has five AND gates, two univibrators, NOT gate, three flip-flops, two memory registers, three pulse counters and OR gate. Unit of filters has suppression filter, band-pass filter and two amplifiers in each of ten channels. EFFECT: possibility of simultaneous exchange of ten users in duplex mode at single frequency using single antenna by means of its switching to receiver and transmitter. 6 cl, 6 dwg