Distributed amplifier circuit for perfecting linearity

A distributed amplifier and linearity technology, which is applied in the direction of improving the amplifier to reduce nonlinear distortion, amplification control, electrical components, etc., to achieve the effect of increasing the degree of freedom and improving the linearity

Active Publication Date: 2016-02-03
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In traditional distributed amplifiers, each gain unit must work under the same DC bias condition because the gain units of each stage are directly coupled.

Method used

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  • Distributed amplifier circuit for perfecting linearity
  • Distributed amplifier circuit for perfecting linearity
  • Distributed amplifier circuit for perfecting linearity

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Embodiment Construction

[0019] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0020] The distributed amplifier circuit structure of the present invention is as follows figure 2 shown, with figure 1 There are three improvements over the conventional distributed amplifier shown:

[0021] (1) There is an interstage matching capacitor before or after at least one input on-chip inductor, and L Gi together form a bandpass matching network, figure 2 The on-chip inductance L at each input Gi There is a capacitor C in front Gi , in fact C Gi Can also be placed in L Gi After; C Gi The quantity is [1,N];

[0022] (2) An independent bias structure R is used at the input end o...

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Abstract

The invention discloses a distributed amplifier circuit for perfecting linearity. The distributed amplifier circuit comprises a plurality of gain units, an input on-chip inductor connected to an input end of each gain unit, and an output on-chip inductor connected to an output end of each gain unit, wherein an interstage matching capacitor is arranged in front of or behind at least one input on-chip inductor, the input end of each gain unit is connected with a biasing resistor, and a bias voltage is applied from the other end of the biasing resistor. According to the distributed amplifier circuit for perfecting linearity disclosed by the invention, the gain units of different circuit structures are adopted, different bias voltages are applied to change the static working points of the gain units so as to change the linearity thereof, the interstage matching capacitor is introduced to offset and isolate direct current at the input ends of the gain units, so that different bias voltages can be applied to the input ends of the gain units, and then the degree of freedom of design and debugging is increased.

Description

technical field [0001] The invention belongs to the technical field of integrated circuits, in particular to a distributed amplifier circuit with improved linearity. Background technique [0002] The rapid development of wireless communication technology puts forward higher requirements on the data transmission rate and bandwidth of the communication system. Commonly used broadband amplifier design techniques include negative feedback, balanced amplifiers, resistor matching, and active matching, etc., but none of these techniques can effectively improve the gain-bandwidth product of the amplifier. Due to its structural characteristics, the distributed amplifier can break through the limitation of the gain-bandwidth product of the amplifier and realize wider-band signal amplification. It is obtained in the field of ultra-wideband MMIC (Monolithic Microwave Integrated Circuit, monolithic microwave integrated circuit) a wide range of applications. Various types of structures ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/32H03G3/20
Inventor 张瑛
Owner NANJING UNIV OF POSTS & TELECOMM
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