AD9786BSV datasheet(12/60 Pages) AD

Part #	AD9786BSV

Description	16-Bit, 200 MSPS/500 MSPS TxDAC with 2횞/4횞/8횞 Interpolation and Signal Processing

PDF	60 Pages

Scroll/Zoom	100%

Manufacturer	AD [Analog Devices]

Direct Link	http://www.analog.com

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12 / 60 page

AD9786

Rev. 0 | Page 12 of 60

Complex Modulation

The process of passing the real and imaginary components of a

signal through a complex modulator (transfer function = ejwt =

coswt + jsinwt) and realizing real and imaginary components

on the modulator output.

Hilbert Transform

A function with unity gain over all frequencies, but with a phase

shift of 90 degrees for negative frequencies, and a phase shift of

–90 degrees for positive frequencies. Although this function can

not be implemented ideally, it can be approximated with a short

FIR filter with enough accuracy to be very useful in single

sideband radio architectures.

Complex Image Rejection

In a traditional two part upconversion, two images are created

around the second IF frequency. These images are redundant

and have the effect of wasting transmitter power and system

bandwidth. By placing the real part of a second complex

modulator in series with the first complex modulator, either the

upper or lower frequency image near the second IF can be

rejected.

AD9786BSV Datasheet(PDF) 12 Page - Analog Devices