Patent ID: 6271721
Filing Date: 2001-08-07
Classification: H03F

Abstract:
An augmented common-base transistor amplifier circuit for amplifying an input signal and producing an output signal comprising:an input terminal for receiving, an input signal;an output terminal for providing an output signal;a common-base transistor having an input, a control, and an output, the input coupled to the input terminal of the augmented common-base transistor amplifier circuit, the output coupled to the output terminal of the augmented common-base transistor amplifier circuit, and further comprising a bipolar transistor having an emitter, a base, and a collector coupled to the input, control, and output, respectively, of the common-base transistor; andan augmentation circuit having an input and an output, the input coupled to the input of the common-base transistor and the output coupled to the control of the common-base transistor, wherein the purpose of the augmentation circuit is to receive a signal error voltage at the input of the common-base transistor, amplify and invert the received signal error voltage, and apply the amplified and inverted signal error voltage to the control of the common-base transistor, thereby reducing the input impedance of the common-base transistor and subsequently increasing the linearity of the augmented common-base transistor amplifier circuit.