LM1872 National Semiconductor, LM1872 Datasheet - Page 14

• Manufacturer Part Number: LM1872
• Description: Radio Control Receiver/Decoder
• Manufacturer: National Semiconductor

10 up to four independent single analog channel receivers
Applications
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
can be made to operate from a single transmitter (Figure
FIGURE 10 Deriving Four Analog Channels Through the Use of an Auxiliary Decoder (Continued)
(Continued)
c) Low-Cost Decoding of Four Analog Channels with DTL
b) Simple Decoding of Four Analog Channels with CMOS
14
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
TL H 7912 – 19
TL H 7912 – 20
See Text