SL6679 データシートの表示（PDF） - Mitel Networks

部品番号

コンポーネント説明

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SL6679

Direct Conversion FSK Data Receiver

Mitel Networks 

SL6679

SL6679

VCC

VREF15mV

CURRENT

SOURCE 1

−

30

−

100k

+

+

32

31

R13

C34

R17

C18

RDECAY

CTC

VREF

VREF

Fig.3 AGC schematic

RF

INPUT

VCC1

TO RF AMP

VOLTAGE

REFERENCE

AFC

DETECTION

CIRCUIT

SL6679

18

VCC2

0µA/5µA

19

5µA/0µA

24

CVREF

C15

CINT 1

R15

VCC1

R11 C21

25

C22

C30

CINT 2

320k

TO VCXO

VARACTOR

DIODE

Fig. 4 AFC schematic

Peak deviation

(kHz)

Baud rate

(bps)

Component (Fig. 4)

C22 C21 R11

3·5

512, 1200, 2400 750pF 2·0nF 15kΩ

4

512, 1200, 2400 560pF 1·5nF 15kΩ

4·5

512, 1200, 2400 510pF 1·3nF 15kΩ

5

512, 1200, 2400 470pF 1·2nF 15kΩ

5·5

512, 1200, 2400 430pF 1·1nF 15kΩ

Table 2 AFC defining components

10

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