Pulse or digital communications – Repeaters – Testing
Patent
1981-07-09
1983-09-06
Safourek, Benedict V.
Pulse or digital communications
Repeaters
Testing
307272A, 328164, H04L 2566
Patent
active
044033303
ABSTRACT:
A regenerative repeater provides amplitude and sequence control of an n-stage digital signal having a high transmission rate with at least one clock pulse driven D flip-flop and a differential amplifier arrangement having n-1 threshold voltages. The arrangement is characterized in that the threshold voltages of the differential amplifier arrangement are capable of being switched over by 1d (n-1) binary control signals and for this purpose a multi-emitter transistor having at least n-1 emitter terminals is provided and has a base terminal, connected with the signal input, and with a bias voltage source. In the case of three of more control signals, the common emitter terminals of the control signal differential amplifiers, activated by the latter, are connected with the collector terminals of the transistors of the next-lower control signal differential amplifier. The collector terminals of the n-1 control signal differential amplifiers, activated by the highest control signal, are respectively connected with the emitter terminals of the multi-emitter transistor.
REFERENCES:
patent: 4224534 (1980-09-01), Gordon
patent: 4289979 (1981-09-01), Muller
Safourek Benedict V.
Siemens Aktiengesellschaft
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