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DDS (direktna digitalna sinteza) signal generator baziran na AD9850 ic kolu.

Predvidjena za generisanje frekventnog opsega od 0 - 40MHz .

Ima dva izlaza sa sinusnim i dva sa pravougaonim signalom.
Modul zgodan za razne eksperimentalne sisteme, protoboarde itd. . .
Paralelni ili serijski ulaz podataka.
Dimenzije: 4.5cm x 2.6cm


Originalni opis:



Direct Digital Synthesizer (DDS) is actually a frequency divider: divide the system clock (SYSTEM CLOCK) by programming the frequency control word to generate the required frequency. DDS has two outstanding features. On the one hand, DDS works in the digital domain. Once the frequency control word is updated, the output frequency will change accordingly and its frequency hopping rate is high. Higher), high frequency resolution. The internal structure of DDS is mainly divided into 3 parts: phase accumulator, phase amplitude conversion, digital-to-analog converter (DAC).



Features: The module can output sine wave and square wave, 2 sine wave and 2 square wave output. AD9850: 0-40MHz After the frequency is 20-30MHz, the harmonic becomes larger and larger, and the waveform will become more and more unclean. Square wave: 0-1MHz Uses a 70MHz low-pass filter to make the waveform`s SN ratio better 10-bit DAC, 32-bit frequency control word The comparator`s reference input voltage is generated by a variable resistor. Adjusting this resistor can get different duty cycle square waves. Note: In the case of outputting a sine wave, connect to the IO port of the square wave output and directly adjust The blue potentiometer can output a square wave. AD9850 module uses 125MHz active crystal