| поискавой системы для электроныых деталей |
|
AD9773AST датащи(PDF) 18 Page - Analog Devices |
|
|
|||||||||||||||||||||||||||||
AD9773AST датащи(HTML) 18 Page - Analog Devices |
|
18 / 19 page ![]() AD9773 18 PRELIMINARY TECHNICAL DATA Figure 15. Complex Representation of Two Stage Upconversion output = r eal × 1 com plex baseband signal ej(ω 1+ω 2)t dc fr equency 1/2 1/2 −ω1-ω2 ω1+ω2 = r eal Figure 14. Two Stage Upconversion and Resulting Image Rejection r ea l cha nnel (in) im a gina r y cha nnel (in) dc dc a b rea l im a gina r y com plex m odula tor out qua dra ture m odula tor r ea l cha nnel (out) im a gina r y cha nnel (out) a/2 a/2 fC -fC* - + fC -fC b/2j - b/2j b/2 b/2 fC -fC fC -fC a/2j - a /2j to qua dr a tur e m odula tor a /4+b/4j a /4- b/4j a /4- b/4j -fQ* -fQ fQ fQ -f Q +f C -f Q -f C f Q +f C f Q -f C - a /4- b/4j a /4+b/4j - a /4+b/4j = -fQ fQ a /2- b/2j r ejected im a ges *fC = com plex m odulation frequency a /4+b/4j - a /4- b/4j *fQ = quadrature m odulation frequency a /2+b/2j In purely complex terms, figure 15 represents the two stage upconversion from complex baseband to carrier. In this example, ω1 and ω2 represent the modulation frequencies of the digital complex modulator and the quadrature modulator. REV. PrA |
|
|
ссылки URL |
| Вашему бизинису помогли Аллдатащит? [ DONATE ] |
Что такое Аллдатащит | реклама | контакт | Конфиденциальность | Ссылка на техническое описание | обмен ссыками | поиск по производителю All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |