4

SP8400

Fig.5 Typical application combining output to increase signal and retain low phase noise

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2

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5

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SP8400

10nF

10nF

1nF

1nF

2x330R

1nF

M

+5V

50R

CLOCK INPUT

INPUTS

A

INPUTS

10nF

330R

1k

+15V

2 x BF569

(or similar)

Available division ratio

All division ratios of 64 to 4103 (Definition 1) will return the

divider to the same internal state at the end of the count and

hence these are the only divisional ratios to be used for

fractional–N synthesiser application.

All division ratios of 56 to 4103 are available for general division

purposes. Additional division ratios available for general

division are:-

8,9

16, 17, 18

24, 25, 26, 27

32, 33, 34, 35, 36

40, 41, 42, 43, 44, 45

48, 49, 50, 51, 52, 53, 54