I found an application note that gives the input model of the TDA7000 and worked from there. My plot seem to agree with the one in the application note.
Zener_Diode said:thanks for helping....
I can't find aplication notes for TDA7000. does someone know where can I get it?
I read that this chip working on if=70MHz, is it right? how can I change it to other if???
Zener_Diode said:I understand, and if I need if=11-12Mhz with sensitivity 0.5uV, for 50ohm antena.
what chip do I need to use????
Zener_Diode said:thanks again for the help.
I want to transmit voice at NB at freq 30-80Mhz, when the freq I choose by digital way, with IF I want(10-12Mhz).
what chip can I use???
Zener_Diode said:Thanks for helping....
I choose mc3362.
I have some questions:
1. at page 4, there is LC connected to pins 21,22. the note saied it should be 10.7Mhz above or below the RF in. The LC tuned to 6.4MHZ below, why 6.4 and not 10.7?????
2. The varicap at pin 23, what dela F LO I can get with it????
3. How can I use PLL wuth this chip?
does someone can tell me a number of a RF amp chip???
why 6.41 and not 10.7?????