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Low Noise Variable Gain Amplifier


GooD of BaSS

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Ce rol are BIT0 din fig.1 ca nu-mi dau seama :limb: , nu cred ca se comporta bine cand se schimba BIT3, dar ma rog odata setat probabil merge bine.Iti propun altceva, folosesti in microcontroler cu 8pini, si 1 PGA(8pini) (programable gain amplifier), pga-urile deobicei au 8 nivele de amplificare. Masori cu ADC-ul intern de la MCU o tensiune si comanzi PGA-ul prin SPI.

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da si eu m-am intrebat acelasi lucru despre bit 0 ,dar ma gandesc ca nu cumva sa nu fie conectati pinul 17 si 19 ca in figura si sa fie pin 19 cu rezistenta si pin 17 la out ,daca nu cumva e sigur asa si bit 3 e cam dubios ....schema merita incercata e tare simplu de realizat, cat despre piese cele doua ci nu am idee cat costa dar sigur n-or fi vreo avere . o sa fac montajul si o sa postez rezultatele . astept in continuare pareri despre schema

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