LNA低噪声放大器设计

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LNA Design Using SpectreRF

MMSIM 13.1

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LNA Design Using SpectreRF............................................................................................ 3

LNA Measurements and Design Specifications ................................................................. 7

Example Measurements Using SpectreRF........................................................................ 14

Conclusion ........................................................................................................................ 62

References ......................................................................................................................... 62

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specific design might require procedures that are slightly different from those described here.

Purpose

This workshop describes how to use new hb analysis in the Virtuoso Analog Design

Environment (ADE) to measure parameters that are important in design verification of low

noise amplifiers (LNAs).

The hb analysis is one new GUI for the harmonic balance analysis, and provides a simple,

usable periodic steady-state analysis for the users. In the hb analysis, one tone or multi-tones

Users of SpectreRF in the Virtuoso Analog Design Environment.

Overview

This workshop describes a basic set of the most useful measurements for LNAs.

The first stage of a receiver is typically a low-noise amplifier (LNA), whose main function is

quite sensitive to the quality of the termination.

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The LNA measurements described in this workshop are calculated using SpectreRF in ADE.

The design investigated is the differential low noise amplifier shown below:

The following table lists typically acceptable values for the performance metrics of LNAs

used in heterodyne architectures.

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Testbench

Figure 1-2 shows a generic two-port amplifier model. Its input and output are each

terminated by a resistive port, like an amplifier measurement using a network analyzer.

(1-1)

where

and

are the reflected waves from the input and output of the LNA,

and