DK-SI-5SGXEA7/ES Altera, DK-SI-5SGXEA7/ES Datasheet - Page 130
DK-SI-5SGXEA7/ES
Manufacturer Part Number
DK-SI-5SGXEA7/ES
Description
KIT DEV STRATIX V FPGA 5SGXEA7
Manufacturer
Altera
Series
Stratix® Vr
Type
FPGAr
Specifications of DK-SI-5SGXEA7/ES
Contents
Board
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
For Use With/related Products
Stratix® V 5SGXEA7
Other names
544-2724
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3–14
Figure 3–11. 18 x 18 Complex Multiplier with Two Variable Precision DSP Blocks for Stratix V Devices
Stratix V Device Handbook Volume 2: Device Interfaces and Integration
Independent Complex Multiplier Modes
c
b
d
a
d
b
c
a
The Stratix V variable precision DSP block provides the means for a complex
multiplication.
Equation 3–1. Complex Multiplication Equation
The Stratix V variable precision DSP block can support an 18 x 18 complex multiplier,
18 x 25 complex multiplier, or a 27 x 27 complex multiplier.
18 x 18 Complex Multiplier
For 18 x 18 complex multiplications, you require two variable precision DSP blocks to
perform this multiplication mode. You can implement the imaginary part [(a × d) +
(b × c)] in the first variable precision DSP block, and you can implement the real part
[(a × c) – (b × d)] in the second variable precision DSP block.
Figure 3–11
18 x 25 Complex Multiplier
Stratix V devices support an individual 18 x 25 complex multiplication mode. you
require three variable precision DSP blocks to implement an individual 18 x 25
complex multiplication mode. The pre-adder feature is automatically enabled for you
to implement an individual 18 x 25 complex multiplication mode efficiently.
18
18
18
18
18
18
18
18
Variable Precision DSP Block 1
Variable Precision DSP Block 2
shows an 18-bit complex multiplication.
(a + jb) × (c + jd) = [(a × c) - (b × d)] + j[(a × d) + (b × c)]
Equation 3–1
Mult_H
Mult_H
Mult_L
Mult_L
x
x
x
x
shows a complex multiplication that you can write.
Adder
Adder
+
+
Chapter 3: Variable Precision DSP Blocks in Stratix V Devices
37
37
(ac - bd )
Imaginary part
(ad + bc)
Real part
Operational Mode Descriptions
May 2011 Altera Corporation
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