CONTROLLED SELECTIVE AMPLIFIER Russian patent published in 2013 - IPC H03F3/45 

FIELD: radio engineering, communication.

SUBSTANCE: controlled selective amplifier additionally comprises the second (8) source of reference current arranged in the form of a current amplification cascade according to a circuit with a common base, the input of which (16) is connected with a source of an input signal (1) via the first (13) frequency-setting capacitor, at the same time bases of the first (2) and second (7) input transistors are connected with a common bus of power supply sources (17), a collector of the second (7) input transistor is connected with a common bus of power supply sources (17) via serially connected second (14) and third (15) frequency-setting capacitors, the common unit of which is connected with the output of the device (18) and via an additional frequency-setting resistor (19) is connected with an emitter of the second (7) input transistor.

EFFECT: reduced total power consumption of crystal-based systems.

2 cl, 9 dwg