LM567_03 datasheet(8/12 Pages) NSC

Part #	LM567

Description	Tone Decoder

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Manufacturer	NSC [National Semiconductor (TI)]

Direct Link	http://www.national.com

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AC Test Circuit

00697509

fi = 100 kHz + 5V

*Note: Adjust for fo = 100 kHz.

Applications Information

The center frequency of the tone decoder is equal to the free

running frequency of the VCO. This is given by

The bandwidth of the filter may be found from the approxi-

mation

Where:

V

i = Input voltage (volts rms), Vi

≤ 200mV

C

2 = Capacitance at Pin 2(µF)

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