Page 147 - CITS - Electronic Mechanic - TT - 2024

ELECTRONICS MECHANIC - CITS

In addition to a precision dual slope converter, both circuits contain BCD to seven segment decoders, display
drivers, a clock and a reference.
Key Features of IC L7106 and L7107:
1 High impedance.
2 Low noise (<15 µV).

3 Clock and reference on clip.
4 No’ external circuitry required.
For signal transmission accuracy, multiplexing is the best technique. It is also used in TV transmission so we must
know about it.
Multiplexing
To combine multiple signals (analog or digital) for transmission over a single line or media, a common type of
multiplexing combines several low-speed signals for transmission over a single high-speed connection.

Multiplexing is done by using a device called multiplexer (MUX) that combines input lines to generate one output
line te, many to one. Therefore, multiplexer has several inputs and one output.
At the receiving end, a device called demultiplexer (DEMUX) is used that separates signals into their component
A9 DEMUX has one input and several outputs.
Transmission of Signal Using Multiplexing:
As shown in the figure, multiplexer takes four-input lines and diverts them to single output line. The signal from
four different devices is combined and carried by this single line.

At the receiving side, a demultiplexer takes this signal from a single line and breaks it into the original signals and
passes them to the four different receivers.

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CITS : E & H - Electronics Mechanic - Lesson 77 - 83