The problem with a broadband AGC is the strongest singnal into the broad input sets the attenuation for the whole input frequency range raising the system mds. This then reguces the dynamic range,
"[EMAIL PROTECTED]" <[EMAIL PROTECTED]> wrote: ZN414 IC 3 pin TO-92 and 8 pin DIP version. AM receiver on a chip. This is interesting because it has AGC built in. If used as a audio amp section after quadrature detection then some degree of AGC can be obtained in the receiver without allot of complexity. The specs mention that it is rated for use from 150 kHz to 3 MHz. Since there are no such things as tuned circuits in the chip I am confident that it may work all the way down into the audio range. Being the rating of 150 kHz is near to 96 kHz but derated dB wise. I have found no specs on the audio output responce and do not expect it will be flat across the spectrum. It should however pass some audio frequencies up to 96 kHz. One may not desire to use it if the specs are not correct for their application but I am sure some will try and it may suit their purposes. If you would like to have your SDR receiver double as a regular receiver with its own speaker then this simple chip will make that possible for AM. This then takes the complexity of circuity out of the design of receivers. Adding extra features in a simple manner. If used this way then the agc line may be sampled and used eslewhere in your scheme when used in SDR mode. __________________________________________________________ Call Anyone, Anytime, Anywhere in the World - FREE! Free Internet calling from NetZero Voice Visit http://www.netzerovoice.com today! [Non-text portions of this message have been removed] ------------------------ Yahoo! Groups Sponsor --------------------~--> Home is just a click away. Make Yahoo! your home page now. http://us.click.yahoo.com/DHchtC/3FxNAA/yQLSAA/ELTolB/TM --------------------------------------------------------------------~-> Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/soft_radio/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
