TRANSFORMER_COUPLED_BASE_MODULATION

Published:2009/7/22 1:19:00 Author:Jessie | From:SeekIC

Modulation is in series with r-f signal, so transistor operates in common-emitter con figuration for both r-f and audio. Waveform is good, but modulation power is only 0.7 mw into 900 ohms when audio bypass C is used. Without bypass, modulation power is 1 mw into 200 ohms.-B. Rheinfelder, Modulation Techniques for Transistorized A-M Transmitters, EEE, 11:7, p 54-57.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Control_Circuit/TRANSFORMER_COUPLED_BASE_MODULATION.html

Print this Page | Comments | Reading(3)