TDA7021T

If you look in the product sheet of the TDA7021T ic circuit there are som numbers missing. Here's the data sheet:

http://www.ortodoxism.ro/datasheets/philips/TDA7021T_CNV_2.pdf

If you scroll down to page 9 you will a schematic of an FM radio. But look at the top of the schematic. At pin 5 there is a capasitor that doen't say how many Farrads it's supposed to have. I know you're supposed to calculate it depending on what frequenicies you want to recieve. But how? For exemple if i want it to recieve between 88-108 MHz. How do you calculate that?

Reply to
negs
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search google about formula to calculate parallel LC tank circuit oscillating frequency. You have to consider also approx. 7pF of internal IC LO capacitance (to the "ground") at those pins too!

-- Regards , SPAJKY ® mail addr. @ my site @

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Spajky

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