LM1872

Manufacturer Part NumberLM1872
DescriptionRadio Control Receiver/Decoder
ManufacturerNational Semiconductor
LM1872 datasheet
 


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Applications
(Continued)
b) Simple Decoding of Four Analog Channels with CMOS
c) Low-Cost Decoding of Four Analog Channels with DTL
FIGURE 10 Deriving Four Analog Channels Through the Use of an Auxiliary Decoder (Continued)
FOUR SINGLE CHANNEL RECEIVERS
DRIVEN FROM A SINGLE TRANSMITTER
When it is desired to control more than two vehicles or re-
mote stations with the analog information from a single
transmitter the LM1872 can be put to the task By utilizing
the frame splitting technique previously described in Figure
10 up to four independent single analog channel receivers
can be made to operate from a single transmitter (Figure
TL H 7912 – 19
11) Toggling digital channel A either directly or through an
inversion is used to suppress a given receiver’s analog out-
put when the undesired analog channels are transmitted In
this manner only the desired analog channel is outputted at
each receiver The amount of external circuitry required to
do this is minimal two receivers require a single transistor
apiece while the other two receivers need no extra parts at
all
14
See Text
TL H 7912 – 20