DIFFERENTIAL AMPLIFIER Russian patent published in 2005 - IPC

FIELD: radio engineering; high-linearity voltage-current converters designed for active operation in wide range.

SUBSTANCE: proposed differential amplifier is designed for operation in miscellaneous analog integrated circuits (for instance, in high-speed operational amplifiers, analog signal multipliers, and the like), within a wide range of 50 to 60 mV up to units of Volts in nonlinear modes limited by final speed of differential amplifier. Speed of the latter rises due to dynamic growth of recharge currents through correcting capacitor at maximal rate of output voltage rise comparable with its speed in linear modes. Differential amplifier has input transistors 1, 3, reference current supplies 2, 4, auxiliary resistor 5 inserted between emitters of transistors 1, 3, and load circuit connected to collectors of transistors 1, 3. Newly introduced are transistors 8, 9 of different structure whose emitters are connected through additional resistors 10, 11 to emitters of transistors 3 and 1, respectively. Bases of transistors 8, 9 are connected to those of transistors 3, 1, respectively.

EFFECT: enlarged active operating range of differential amplifier.

4 cl, 5 dwg