Tone Detector

FX105A

© 1999 Consumer Microcircuits Limited

5

D/105A/5

1.4

External Components

See section 1.6

See section 1.6

See section 1.6

See section 1.6

See section 1.6

See section 1.6

See section 1.6

20kohm

±20%

See section 1.6

See section 1.6

See section 1.6

See section 1.6

See section 1.6

IN914 or similar

0.27µF

±20%

0.1µF

±20%

Note s:

1.

For improved performance C4 may be chosen to provide 30° phase shift at the VCO

loop filter input.

2.

3.

4.

not exceed the value given in section 1.7.1

Figure 2 Recommended External Components