TRANSISTOR BANDPASS AMPLIFIERS OF WELL-DEFINED PERFORMANCE
Abstract
A discussion of basic stability and gain considerations in active two-port networks is followed by an analysis of the conditions under which the transducer gain may be well-defined, in the sense of being affected little by changes in active device parameters. Two methods of ACHIEVING WELL-DEFINED PERFORMANCE, INVOLVING MISMATCHING OR LOADING WITH LOSS ELEMENTS RESPECTIVELY AT THE PORTS, ARE TREATED, AND SHOWN TO LEAD TO SIMPLE DESIGN PROCEDURES FOR BOTH SINGLE AND TRANSFORMER-COUPLED CASCADED STAGES. It is also shown that by suitably loading the ports with dominant imaginary terminations the gain characteristic may be made well-defined and analytic in form over wide frequency range. Practical examples of transistor bandpass amplifiers illustrate the theory and show that common-base stages are particularly appropriate for amplifiers of the type considered. In the examples quoted the bandwidth is of the same order as the bandcenter frequency. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 12, 1961
- Accession Number
- AD0277370
Entities
People
- A.r. Boothroyd
Organizations
- University of California, Berkeley