use the LM567 as a PLL to demodulate FM???

[Electricman2K5]

Does anyone know how to use the LM567 as a PLL to receive and demodulate an FM signal of say 40khz?

I have the LM565 but it requires -ve voltage so its inconvenient.

Thannks for any help

 

[DJ_ReL@X!]

I wanted that too, but it is impossible. It only compares frequencies. I had to use LM565.

If you don't want to use two power supplies add an offset (half your power supply) to the input signal.

 

[FRIED]

**broken link removed**
The majority of the circuit examples here show how to bias the input for single supply.

 

[Sebi]

LM567 commonly used as modulator-demodulator in powerline intercoms.
Work fine.

 

[DJ_ReL@X!]

Of course it can be used as a demodulator, but only for digital signals. Electricman is talking about FM, not FSK. Am I right?

 

[Electricman2K5]

Lm567 as demodulator

Ive attactched my schematic Im not sure if it can be used or not i couldnt get the LM565 to work for some reason so Im trying the 567 . C\an I use the 567 instead of the 565 here ?????

 

[audioguru]

Its 1uF caps are way too high in value and will make it lock only to a 40Hz carrier.