Hello.Is it necessary to use a bandpass filter at pin 11 (RF out) of this IC. Many applications suggest to use GFMB3 **broken link removed** but i cant find this.?Does BH1415F haw spurius oscillations?
Yes, the BH1415, BH1416 and BH1417 stereo FM transmitter ICs produce harmonics at the output. The harmonics might cause communications interference or TV interference.
The Micromitter project and kit has this bandpass filter and attenuator at its outpurt: