i'm built a circuit using mm74hc4046.
i'm connected 4.5 vdd.
r1=330k,r2=330k,c1=3.3nF for the VCO.
i got 15kHz for the VCO center frequency.
but when i change the input signal to what ever frequency.
the output still showing the same thing.
pls some one help me.
I think you need to use at least five negative resistors. Arrange them so they face north, east, south and west with the last one pointing upwards. It doesn't matter which way around you connect them as that only applies to resistors with positive values. Atmospheric turbulence and solar magnetic flux with then alter the frequency according to my cat's mood and all will be well.
Alternatively, give us a schematic so we can see what on Earth you are talking about.
I think you need to use at least five negative resistors. Arrange them so they face north, east, south and west with the last one pointing upwards. It doesn't matter which way around you connect them as that only applies to resistors with positive values. Atmospheric turbulence and solar magnetic flux with then alter the frequency according to my cat's mood and all will be well.
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