THE EXTENSION OF DYNAMIC RANGE AND FREQUENCY COVERAGE IN SOLID-STATE AMPLIFIERS AND MIXERS

摘要

Investigations were made to increase the dynamic range and frequency coverage of solid-state VHF re¬ceivers. The following aspects are considered.nA theoretical and experimental comparison is made between a field-effect transistor and a conventional transistor amplifier in respect to intermediation distortion and noise figure. Balanced amplifiers with feedback are con¬sidered for improving dynamic range. The phase and amplitude criteria at the fre¬quency crossover of partitioned amplifiers are investigated. experimental data are presented on a doubly balanced mixer, a logarithmic amplifier, and a voltage-tuned filter covering from 650 to 900 Mc.