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Low Noise Amplifier Design

Low Noise Amplifier Design

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In Chapter 8, we introduced noise and noise figure in mathematical terms. In this chapter, we will show how this information applies to transistor amplifiers. Two-port S-parameters and noise characteristics are published by microwave manufacturers to ensure that the transistor can be easily utilized in an amplifier design. We have introduced a mathematical representation of noise created by a two-port. The noise added by the two-port is characterized by a few quantities that are essential to the two-port and the input reflection coefficient. Some transistor data sheets show noise parameters for a particular transistor at several frequencies.

Chapter Contents:

  • 9.1 Introduction
  • 9.2 Constant Noise Figure Circles
  • 9.3 Cascaded Noise Figure
  • 9.4 Low Noise Bias and Dynamic Range
  • 9.5 Summary
  • 9.6 Problems
  • 9.7 Appendix

Inspec keywords: microwave amplifiers; low noise amplifiers; S-parameters

Other keywords: two-port S-parameters; mathematical representation; noise figure; noise characteristics; mathematical terms; low noise amplifier; information applies; microwave manufacturers; transistor amplifiers

Subjects: Amplifiers; Microwave circuits and devices

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