LM567 National Semiconductor, LM567 Datasheet - Page 6

• Manufacturer Part Number: LM567
• Description: Tone Decoder
• Manufacturer: National Semiconductor

www.national.com
Typical Applications
Connect Pin 3 to 2.8V to Invert Output
AC Test Circuit
f
*
i
Note: Adjust for f
= 100 kHz + 5V
Oscillator with Quadrature Output
o
= 100 kHz.
(Continued)
Precision Oscillator Drive 100 mA Loads
DS006975-9
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6
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
C
i
2
Oscillator with Double Frequency Output
= Input voltage (volts rms), V
= Capacitance at Pin 2 (µF)
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i
200 mV
DS006975-7