LM567

Manufacturer Part NumberLM567
DescriptionTone Decoder
ManufacturerNational Semiconductor
LM567 datasheet
 


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Typical Applications
(Continued)
Oscillator with Quadrature Output
Connect Pin 3 to 2.8V to Invert Output
AC Test Circuit
= 100 kHz + 5V
f
i
= 100 kHz.
*
Note: Adjust for f
o
www.national.com
Oscillator with Double Frequency Output
DS006975-6
Precision Oscillator Drive 100 mA Loads
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:
= Input voltage (volts rms), V
V
i
= Capacitance at Pin 2 (µF)
C
2
DS006975-9
6
DS006975-7
DS006975-8
200 mV
i