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50    ,  , . 8/2

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GSM

» , - , , , » » ( ) » ( )

( )


1:  1200 .
2:  1200 .

( )

, - (time sequencer), , .

  .. (LNA) c   , .

: 45 x 50

X 1 - + 12 ; 

X 2 – ; 

X 3 –GP 0 ( ) - 30 , 1A; 

X 4 –GP 1 ( ) - 30 , 1; 

X 5 - GP 2 ( ) - 30, 1 .

Microchip PIC12F509.

1. GP3 -

2. GP0,GP1,GP2 –

3. 4

4. GP4,GP5 –

R1 - 1,5k.

C1 R1 . , , GP3 , 50k.

C1 – 10n. .

R2,R3,R4 – 10k-20k, , 300,

25, .

2,5 – 5,5 .

- < 2 , SLEEP (,) < 1mka.

.

  GP3 1, GP0,GP1,GP2 0.    .                                                        

R1 “” . GP0 1, ~50 GP1 1, ~50 GP2 1.

“” R1.

“” , GP2 0. ~50 GP1 0,  

~50 GP0 0. ~200 .

 

 



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