Shakespeare Electronic SE500 Dokumentacja Pobierz pdf (Strona 34)

CC1000

SWRS048A Page 34 of 55

23. IF output

CC1000

has a built-in 10.7 MHz IF output

buffer. This buffer could be applied in

narrowband applications with

requirements on mirror image filtering.

The system is then built with

CC1000

, a

10.7 MHz ceramic filter and an external

10.7 MHz demodulator. The external

network for IF output operation is shown in

Figure 23. R281 = 470 Ω, C281 = 3.3nF.

The external network provides 330 Ω

source impedance for the 10.7 MHz

ceramic filter.

RSSI/IF

CC1000

R281

C281

To 10.7MHz filter

and demodulator

RSSI/IF

CC1000

R281

C281

To 10.7MHz filter

and demodulator

Figure 23. IF output circuit

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