MULTISTAGE ALTERNATING CURRENT AMPLIFIER Russian patent published in 2012 - IPC H03F3/45 

FIELD: radio engineering.

SUBSTANCE: alternating current amplifier includes in-series connected current mirrors (1), (2), each of which has current input (3.1, 3.2), non-inverting (4.1, 4.2) and inverting (5.1, 5.2) current outputs; at that, each of current mirrors includes p-n junction (6.1, 6.2) connected between its current input (3.1, 3.2) and non-inverting current output (4.1, 4.2) and output transistor (7.1, 7.2) the base of which is connected to current input (3.1, 3.2) of current mirror. Correcting capacitor (8.1, 8.2) is connected in each of current mirrors 1 and 2 between emitter of output transistor (7.1, 7.2) and its non-inverting current output (4.1, 4.2), and emitter of output transistor (7.1, 7.2) is connected to current-stabilising bipole (9.1, 9.2).

EFFECT: enlarging functional capabilities owing to shaping the resonance amplitude-frequency response of transfer coefficients as to currents at rather low power consumption and high values of amplification coefficient K_i.

3 cl, 10 dwg