ANALOGUE VOLTAGE MULTIPLIER Russian patent published in 2010 - IPC G06G7/12 

FIELD: physics; radio.

SUBSTANCE: invention relates to radio engineering and communication and can be used in automatic gain control devices, phase detectors and modulators, as well as in phase-locked loop systems and frequency multiplication systems or as an amplifier whose voltage transfer ratio depends on the control signal level. To achieve the result, the analogue voltage multiplier has a first differential stage (1), which has current outputs (2) and (3), potential inputs (4) and (5) and a current input (6), a second differential stage (7) having current outputs (8) and (9), potential inputs (10) and (11) and a current input (12). The second (5) potential input of the first (1) differential stage is connected to the first (10) potential input of the second differential stage (7) and the first input (13) of the first multiplication channel X. The first (4) potential input of the first differential stage (1) is connected to the second (11) potential input of the second differential stage (7) and the second input (14) of the first multiplication channel Y. The analogue voltage multiplier also has a first (15) controlled reference current source, and a second (16) controlled reference current source. The circuit also includes a first additional composite transistor (17) whose base is the first (18) input of the multiplication channel Y, the collector (emitter) is connected to the current input (12) in the common emitter circuit of the second (7) differential stage, and the emitter (collector) is connected to the current input (6) in the common emitter circuit of the first (1) differential stage.

EFFECT: provision for working capacity of the analogue voltage multiplier at power voltage of ±1,5 V and provision for high linearity of multiplication on channel Y, including during considerable asymmetry of control signals u_c and .

6 cl, 17 dwg