Abstract: A low-power, low-noise amplifier with a negative feedback loop is provided. A low noise amplifier (LNA) includes a common gate (CG) amplifier, a common source (CS) amplifier having a gate connected to a source of the CG amplifier, a differential current balancer (DCB) connected to an output end of the CG amplifier and an output end of the CS amplifier, a symmetric load connected to the DCB, and a current bleeding circuit with one end connected to the output end of the CS amplifier and another end connected to the symmetric load, the current bleeding circuit including an active element and a load corresponding to the symmetric load, and an output end of the active element is connected to a gate of the CG amplifier.

Abstract: A low-power, low-noise amplifier with a negative feedback loop is provided. A low noise amplifier (LNA) includes a common gate (CG) amplifier, a common source (CS) amplifier having a gate connected to a source of the CG amplifier, a differential current balancer (DCB) connected to an output end of the CG amplifier and an output end of the CS amplifier, a symmetric load connected to the DCB, and a current bleeding circuit with one end connected to the output end of the CS amplifier and another end connected to the symmetric load, the current bleeding circuit including an active element and a load corresponding to the symmetric load, and an output end of the active element is connected to a gate of the CG amplifier.

Abstract: Disclosed is a low noise amplifier including a current bleeding circuit. The low noise amplifier includes a common gate amplifier, a common source amplifier of which a gate is connected to a source of the common gate amplifier, a symmetric load connected to an output end of the common gate amplifier and an output end of the common source amplifier, and a current bleeding circuit of which one end is connected to the output end of the common source amplifier and another end is connected to the symmetric load, and including an active element and a load corresponding to the symmetric load.

Abstract: Disclosed is a low noise amplifier including a current bleeding circuit. The low noise amplifier includes a common gate amplifier, a common source amplifier of which a gate is connected to a source of the common gate amplifier, a symmetric load connected to an output end of the common gate amplifier and an output end of the common source amplifier, and a current bleeding circuit of which one end is connected to the output end of the common source amplifier and another end is connected to the symmetric load, and including an active element and a load corresponding to the symmetric load.

Abstract: A device and method for solving problems of the prior art in which channel information as well as a DC offset is removed when removing the DC offset using a feedback signal of a baseband amplifier is provided. The device includes a DC offset correcting unit for removing the DC offset using an HPF function and controlling a feedback path according to a control signal to stop the HPF function and a signal generator for generating the control signal for controlling the HPF function, wherein the control signal is a signal for controlling formation and cutting-off of the feedback path.

Abstract: A Radio Frequency (RF) amplifier in a communication system and a method for controlling the RF amplifier are provided. The RF amplifier includes an input unit for receiving an RF signal, a cascode unit for amplifying the RF signal according to a gain of the RF amplifier and for outputting the amplified RF signal, a load unit connected to the cascode unit, and a gain controller for controlling the gain by converting an impedance in a baseband to an impedance viewed from an RF band, the gain controller being connected in parallel to the load unit.

Abstract: A device and method for solving problems of the prior art in which channel information as well as a DC offset is removed when removing the DC offset using a feedback signal of a baseband amplifier is provided. The device includes a DC offset correcting unit for removing the DC offset using an HPF function and controlling a feedback path according to a control signal to stop the HPF function and a signal generator for generating the control signal for controlling the HPF function, wherein the control signal is a signal for controlling formation and cutting-off of the feedback path.

Abstract: A Radio Frequency (RF) amplifier in a communication system and a method for controlling the RF amplifier are provided. The RF amplifier includes an input unit for receiving an RF signal, a cascode unit for amplifying the RF signal according to a gain of the RF amplifier and for outputting the amplified RF signal, a load unit connected to the cascode unit, and a gain controller for controlling the gain by converting an impedance in a baseband to an impedance viewed from an RF band, the gain controller being connected in parallel to the load unit.