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Quadrature output low noise transconductance amplifier having differential input

A technology of transconductance amplification and low noise, applied in the field of low-noise transconductance amplifiers, which can solve the problems of increasing the cost of inductors and increasing the size of integrated circuits.

Inactive Publication Date: 2013-11-06
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inductors can add further cost as they can occupy a large amount of die area on an integrated circuit and may require additional tuning steps for proper operation
In addition, conventional LNTA designs can double the amplifier circuit to provide both in-phase and quadrature output signals, further increasing the size requirements of the integrated circuit

Method used

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  • Quadrature output low noise transconductance amplifier having differential input
  • Quadrature output low noise transconductance amplifier having differential input
  • Quadrature output low noise transconductance amplifier having differential input

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Embodiment Construction

[0015] Aspects of the present invention are disclosed in the following description and related drawings for specific embodiments of the present invention. Alternative embodiments may be devised without departing from the scope of the invention. In addition, the well-known elements of the present invention will not be described in detail or omitted so as not to obscure the relevant details of the present invention.

[0016] The word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any embodiment described herein as "exemplary" need not be construed as preferred or advantageous over other embodiments. Likewise, the term "embodiments of the invention" does not require that all embodiments of the invention include the discussed feature, advantage or mode of operation.

[0017] The terminology used herein is only for the purpose of describing specific embodiments and is not intended to limit the embodiments of the present invention. As used herei...

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Abstract

A device for providing low noise transconductance amplification is presented. The device includes a PMOS transconductance section configured to receive a differential RF input signal, a PMOS cascode section coupled to the PMOS transconductance section, an NMOS transconductance section configured to receive the RF differential input signal, and an NMOS cascode section coupled to the NMOS transconductance section, where the PMOS and NMOS cascode sections provide a differential quadrature output signal and a differential in-phase output signal. A method for amplifying an RF signal is also presented. The method includes receiving a differential RF input signal, converting the differential RF input signal into current signals, buffering the current signals to provide a differential quadrature output signal and a differential in-phase output signal.

Description

Technical field [0001] The embodiments of the present invention generally relate to amplifiers, and more specifically, to a low-noise transconductance capable of accepting differential RF input signals and providing amplified differential in-phase and quadrature (I / Q) output signals Amplifier (LNTA). Background technique [0002] The growing demand for low-cost, miniaturized, and power-efficient communication systems is driving the need for higher levels of functionality to be incorporated into integrated circuits. In order to minimize the area and associated costs of these integrated circuits, there is a great need for novel and innovative ways of providing low noise amplification in environments that may have high interference levels. However, these benefits should not be obtained at the expense of reduced performance requirements (eg, linearity and / or power consumption). Maintaining existing performance requirements is important because emerging communication standards have ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/18H03F3/45H03F1/26
CPCH03F3/45242
Inventor 鲁塞尔·法格
Owner QUALCOMM INC