FACILITY TO SUSTAIN A C OPERATING CONDITION OF AMPLIFIER Russian patent published in 2003 - IPC

FIELD: fiber-optical communication lines, design of fast-action transmitting and receiving devices. SUBSTANCE: facility to sustain A C operating condition of differential amplifier 1 is first unit of device that has leads-out connected to common bus and supply source and three inputs ( input pulse signal is fed to first input during operation, output pulse signal flows through lead of first output during operation ). Facility incorporates three more units: second unit 2 fixes level of constant voltage of signal from differential stage, third unit 3 subtracts alternating pulse signal and adds up constant signal, fourth unit 4 is unit for comparison and control over operating condition. EFFECT: maintenance of stable operating condition of differential amplifier with amplification of pseudorandom pulse signal in wide frequency and dynamic ranges. 1 cl, 3 dwg