ROOM_MONITOR

Published:2009/6/23 3:17:00 Author:Jessie | From:SeekIC

The circuit uses Q1 to buffer the right-channel balance output while Q2 and Q3 form a VOX circuit. When the signal level from the microphone goes high, the output of the VOX also goes high and the multiplexer inside IC1 switches the high-gain left-channel output through to a following buffer stage. This signal is then ac-coupled via C3 into an RE mixer stage and thence to an RF amplifier, which is tuned by C2 and L2.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Power_Supply_Circuit/ROOM_MONITOR.html

Print this Page | Comments | Reading(3)