SUPERHETERODYNE CONVERTORS and 1-F AMPLIFIERS
ELECTRONIC TECHNOLOGY SERIES SUPERHETERODYNE CONVERTORS and 1-F AMPLIFIERS ,#.,_. •~· .• :· :-,:·,' . ...~ ' ' ' . ' ,\,.. • · ,, . ,·;, . :; ~: ~, :· ,. ~: '.·· .. '. •'.~ ;·. '~ . ' . ., . :• a publication SUPERHETERODYNE CONVERTERS AND 1-F AMPLIFIERS Edited by Alexander Schure, Ph. D., Ed. D. JOHN F. RIDER PUBLISHER, INC., NEW YORK a division of HAYDEN PUBLISHING COMPANY, INC. Copyright IC 1963 JOHN F. RIDER PUBLISHER, INC. All rights reserved. This book or any parts there may not be reproduced in any form or in any language without permission. SECOND EDITION Library of Congress Catalog Number 6J-20JJ6 Printed in the United States of America PREFACE The utilization of heterodyning action in receiver design via local oscillator, mixer, or converter action marks one of the major steps in the advance of communications. Application of the basic prin ciples of superheterodyne operation solved many of the problems inherent in the earlier tuned radio frequency receivers. Such factors as receiver stability, gain, selectivity, and uniform bandpass over an entire band could be improved by using the superheterodyne receiver. The reasons for the enormous popularity of this design are apparent, as is the need for the technician to understand the theory and operation of superheterodyne converters and i-f ampli fiers. This book is organized to provide the student with an under standing of these fundamental principles, with emphasis on the descriptive treatment and analyses. Mathematical formulas or numerical examples are presented where pertinent and necessary to illustrate the discussion more fully. Specific attention has been given to the essential theory of mixers and converters; basic superheterodyne operation; arithmetic selec tivity; image frequency considerations; double conversion; conver sion efficiency; oscillator tracking; pulling and squegging; types of converters (both early and modern) ; functions and design factors of i-f amplifiers; choices of i-f frequencies; ave and davc; the Miller effect; and the consideration of alignment procedures.
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