RF Teeb liab Generator 100 KHz-600 MHZ ntawm DDS AD9910 Arduino Shield: 5 Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:25

Yuav ua li cas thiaj tsis muaj suab nrov, ua kom raug siab, ruaj khov RF lub tshuab hluav taws xob (nrog AM, FM Modulation) ntawm Arduino.

Khoom siv

1. Arduino Mega 2560

2. OLED Qhia 0.96"

3. DDS AD9910 Arduino Shield

Kauj Ruam 1: Kev Kho Vajtse

Muab tso ua ke

1. Arduino Mega 2560

2. OLED Qhia 0.96"

3. DDS AD9910 Arduino Shield

gra-afch.com/catalog/arduino/dds-ad9910-arduino-shield/

Kauj ruam 2: Txhim Kho Software

Peb coj cov firmware los ntawm no thiab suav sau hauv arduino IDE

github.com/afch/DDS-AD9910-Arduino-Shield/…

Kauj Ruam 3: Kev hloov kho

Lub tshuab hluav taws xob 40 MHz tau siv rau ntawm peb lub rooj tsavxwm, yog li peb ua cov teeb tsa zoo li no

Kauj Ruam 4: Peb Tau Txais Qhov Zoo Tshaj Plaws Zoo Tshaj Plaws Los Ntawm Tuam Tshoj

Peb tau txais txiaj ntsig zoo dua li ntawm lub nkoj los ntawm Tuam Tshoj!

Muaj ntau qhov sib haum xeeb thiab tsis zoo ntawm lub vijtsam ntawm lub rooj tsavxwm, thiab lawv qib mus txog -25 dBm! Thiab qhov no yog txawm tias qhov tseeb tias raws li cov ntaub ntawv los ntawm Analog Devices rau AD9910 qib kev sib haum xeeb yuav tsum tsis pub tshaj -60 dBm. Tab sis ntawm lub rooj sib tham no sib haum xeeb ib puag ncig -60 dBm! Qhov no yog qhov txiaj ntsig zoo!

Theem nrov nrov

Qhov ntsuas no tseem ceeb heev thiab txaus siab rau cov uas yuav DDS. Txij li lub suab nrov hauv theem ntawm DDS pom tseeb tsawg dua li ntawm PLL cov tshuab hluav taws xob, tus nqi kawg yog nyob ntawm qhov chaw moos. Txhawm rau kom ua tiav cov txiaj ntsig tau teev tseg hauv cov ntawv teev npe ntawm AD9910, thaum tsim peb DDS AD9910 Arduino Shield, peb nruj ua raws txhua qhov kev pom zoo los ntawm Cov Khoom Siv Sib Xws: PCB teeb tsa hauv 4 txheej, cais cov khoom siv hluav taws xob ntawm txhua 4 kab hluav taws xob (3.3 V digital, 3.3 V analog, 1.8 V digital, thiab 1.8 V analog). Yog li, thaum yuav peb DDS AD9910 Arduino Shield, Koj tuaj yeem tsom mus rau cov ntaub ntawv los ntawm cov ntawv teev npe ntawm AD9910.

Daim duab 16 qhia txog qib suab nrov thaum siv PLL built-in hauv DDS. PLL sib tshooj ntau zaus ntawm 50 MHz lub tshuab hluav taws xob los ntawm 20 zaug. Peb siv cov zaus sib xws - 40 MHz (x25 Multiplier) lossis 50 MHz (x20 Multiplier) los ntawm TCXO uas ua rau muaj kev ruaj ntseg ntau dua.

Thiab daim duab 15 qhia txog qib suab nrov thaum siv lub moos siv sab nraud 1 GHZ, nrog rau PLL tawm.

Sib piv ob lub tswv yim no, piv txwv li, rau Fout = 201.1 MHz thiab sab hauv PLL qhib ntawm 10 kHz tus xa xov xa tawm, theem suab nrov yog -130 dBc @ 10 kHz. Thiab nrog PLL tawm thiab siv lub moos sab nraud, theem suab nrov yog 145 dBc @ 10kHz. Ntawd yog, thaum siv lub moos sab nraud theem suab nrov los ntawm 15 dBc zoo dua (qis dua).

Rau tib qhov zaus Fout = 201.1 MHz, thiab sab hauv PLL qhib ntawm 1 MHz cov neeg xa khoom tawm, theem suab nrov yog -124 dBc @ 1 MHz. Thiab nrog PLL tawm thiab siv lub moos sab nraud, theem suab nrov yog 158 dBc @ 1 MHz. Ntawd yog, thaum siv lub moos sab nraud theem suab nrov los ntawm 34 dBc zoo dua (qis dua).

Xaus: thaum siv lub moos sab nraud, Koj tuaj yeem tau txais lub suab qis qis dua li siv PLL-built-in. Tab sis tsis txhob hnov qab tias txhawm rau ua tiav cov txiaj ntsig ntawd, cov kev xav tau nce ntxiv tau muab tso rau pem hauv ntej rau lub tshuab hluav taws xob sab nraud.

Kauj Ruam 5: Cov phiaj xwm

Cov phiaj xwm nrog Phase Noise