一种用于gnss接收机的放大、混频及滤波装置

Amplifying, mixing and filtering device for GNSS (global navigation satellite system) receiving set

Abstract

The invention relates to an amplifying, mixing and filtering device for a GNSS receiving set. The amplifying, mixing and filtering device comprises a high gain and gain controllable low noise amplifier, a passive orthogonal mixer assembly and a multi-phase filter which are sequentially connected. The device adopts the novel low noise amplifier which adopts a current source load, so that the gain is increased greatly, and the gain controllable function is realized. Simultaneously, compared with a conventional lower noise amplifier with an inductive load, the manufacturing cost is reduced substantially due to the fact that the low noise amplifier doesn't comprise a load inductor with a larger chip area. Due to the high gain of the low noise amplifier, the noise margin of a circuit to a post-module is increased, so that two later orthogonal demodulation mixers of the circuit can adopt the passive frequency mixer and the multi-phase filter which are free of current consumption, and the power consumption is reduced. By means of the high gain and gain adjustable function of the circuit, the design requirement of the post-module is reduced, and the overall power consumption is further reduced.
本发明涉及一种用于GNSS接收机的放大、混频及滤波装置,包含依次连接的一个高增益且增益可控的低噪声放大器、无源正交混频器组件和一个多相滤波器。本发明采用了一种新型的低噪声放大器。该低噪声放大器采用电流源负载,较大提高了增益,并且实现了增益可控功能。同时相比于传统电感负载的低噪声放大器,因为不包含芯片面积较大的负载电感,大幅减少了制造成本。低噪声放大器的高增益使电路对后级模块的噪声容限增加,使得电路后级的两路正交解调混频器得以采用无电流消耗的无源混频器和多相滤波器,减少了功耗。因为电路的高增益和增益可调功能,还使得后级模块的设计要求降低,进一步减小了整机功耗。

Claims

Description

Topics

Download Full PDF Version (Non-Commercial Use)

Patent Citations (3)

    Publication numberPublication dateAssigneeTitle
    CN-102096079-AJune 15, 2011杭州中科微电子有限公司Method for constructing radio frequency front end of multi-mode multi-band satellite navigation receiver and module thereof
    CN-1774868-AMay 17, 2006硅实验室股份有限公司Tuner for radio frequency receivers and associated method
    CN-203204156-USeptember 18, 2013武汉大学一种用于gnss接收机的放大、混频及滤波装置

NO-Patent Citations (1)

    Title
    马伟 等: "《用于低中频GPS接收机的高性能CMOS差分低噪声放大器设计(英文)》", 《东南大学学报(英文版)》, vol. 25, no. 1, 31 March 2009 (2009-03-31)

Cited By (1)

    Publication numberPublication dateAssigneeTitle
    CN-105162450-ADecember 16, 2015四川九洲电器集团有限责任公司Interface circuit matched with quadrature modulator