THEORY OF NOISE MEASUREMENTS ON PARAMETRIC SOLID-STATE AMPLIFIER OF TRANSMISSION CAVITY TYPE,
Abstract
This memo considers the case when a transformer is used between the parametric amplifier and the second stage allowing for variation of the input impedance of the second stage as seen at the parametric amplifier ter minals. It is shown that by a proper adjustment of the transformer ratio the optimum noise performance of the parametric amplifier can be achieved and the noise contributed by the second stage can be suppressed. This is accomplished at the sacrifice of the bandwidth obtainable with a circulator which, as has been shown elsewhere, accomplishes the optimum noise performance. However, the transformer scheme may well be used to determine the fundamental noise parameter of the amplifier if it turns out to be practicable experimentally.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 08, 1959
- Accession Number
- AD0606471
Entities
People
- Hermann A. Haus
Organizations
- Massachusetts Institute of Technology