CONTROLLED AMPLIFIER AND ANALOGUE MULTIPLIER OF SIGNALS ON ITS BASIS Russian patent published in 2010 - IPC H03G3/30 

FIELD: radio engineering.

SUBSTANCE: invention may be used in devices of automatic control of amplification, phase detectors and modulators, and also in systems of phase automatic tuning and multiplication of frequency or as amplifier, coefficient of transmission by voltage of which depends on the level of control signal. Analogue multiplier is the basic unit of modern systems for receiving and processing of signals of HF and SHF ranges, analogue computer and measurement equipment. Controlled amplifier comprises the first (1) input and the first (2) output transistors, bases of which are combined, the first current-stabilising dipole (3) connected to collector of the first (1) input transistor and connected to bases of the first (1) input and first (2) output transistors, load circuit (4) connected to collector of the first (2) output transistor, the first source of signal (5) connected to emitter of the first (1) input transistor, the first (6) source of amplification control signal. Circuit comprises the second (7) input transistor, emitter of which is connected to the first (6) source of amplification control signal, collector is connected to the first current-stabilising dipole (3), and base is connected to base of the first (1) input transistor.

EFFECT: reduced permissible voltage of power supply.

6 cl, 16 dwg