TA7641 wired interphone circuit

Published:2011/5/28 1:29:00 Author:chopper | Keyword: wired interphone | From:SeekIC

We can make a wired interphone easily by using a single chip IC TA7641 in AM radio.The interphone circuit is shown as follows.The interphone is formed by A and B.A is the host,and B is extension.Actually,B is a speaker B2.A and B is connected by twinax cable.When plug XP is inserted to socket XS,the interphone runs.Switch S is a talkback transfer switch.As the following picture,A is in speech state, and B is for obedient state.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Electrical_Equipment_Circuit/Telephone-Related_Circuit/TA7641_wired_interphone_circuit.html

Print this Page | Comments | Reading(3)