Project digitlnho USB vyslae project digitlnho FM vyslae for psmo 76 and 108 MHz with a USB interfa

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Project digitlnho USB vyslae project digitlnho FM vyslae for psmo 76 and 108 MHz with a USB interface. She left nevyaduje to use dnho Dalhem source crystal audio signle and napjen vyuv USB port.
FmStick the project digitlnho FM vyslaes USB ports (except sti VF) does dn analog blocks. Clem is create a small, easily portable and you easily pouiteln zazen, which looks like a classic USB Flash disk. Needless to say, this mylenka nen new, similar projects between the mon change napklad Griffi RocketFM or Keene USB FM Transmitter, which are available in internetovch stores. OVEM nsledujc design from SUCH zazen if pedevmtm, ev dn sti circuit does not work with analog audio signle, support RDS and dobrmvkonem.
The Base Features: Vyslac frequency: 76 ... 108 MHz Vyslac crystal effective treatment: -60 ... 20 dBm Audio Compression: Yes Limitations: Yes Supports men also audio signle Preemfze: 0/50/75 uS Support RDS, RDS and RDS RadioText Time Nevyaduje installing drivers Nevyaduje extern napjen
As of blokovho schm apparent FmStick came out with SKLD only two hlavnch circuit: TAS1020B and SI4711 crystal (front-end). According to the bites and then type 24LC64 EEPROM memory, which contains the firmware crystal and transversely-mounted configuration vyslae. Sound that is generovnpipojenm PC is via USB GUIs foaming to chip TAS1020B, where it is in the form digitlnho led to I2S interface circuit FM High lae type SI4711, crystal which contains a spit compression, limiter and preemfzi. Its input is vysokofrekvenn it, frekvenn modulated signle which is the zeslen urns for vysln.
Main Divide from konvennch een SPOVO first circuit SI4711, which contains the classic FM modulated osciltor (which usually vyuv kapacitnch diodes). The city nj there is implementovno modern I / Q-modulan schm where veker zen, check ifze FM modulation amplitude integrated DSP d j dro. Input signle is zesilovna to approx. +20 DBm (100 mW) circuit BFG541. Handy takovho systmu (which vyuv I / Q-modultor) in the first ad Vražné better quality transfer, which vnkter respects Pekon i komern crystal FM vyslae.
She left was the author testovns design crystal circuits SI4711-A20-GM/SI4711-A20-GMR. Ml-voltage circuits would work with a series SI4711-B30-GM/SI4711-B30-GMR SI4713-A20-GM/SI4713-A20-GMR or SI4713-B30-GM/SI4713-B30-GMR. OVEM ada podobnch circuit (SI4711-A-GM/SI4711-A-GMR i VECHNA version SI4710/SI4712) digitln does not sound so you can not pout. The only eenm would it ppad was their refill an external DAC, OVEM only from the outside kor sloitosti crystal celho zazen .
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