Wiki

Below is the source of this page. To edit this source as well as other pages on the wiki, you must login.
======Multiply======
\\
[[resources:tools-software:sigmastudio:toolbox:basicdsp|Click here to return to the Basic DSP page]]
\\
There are four kinds of multiplication supported. 
    - Multiply(Real Signals)
    - Multiply(Complex Signals)
    - Multiply(Complex-Real Signals)
    - Multiply(Complex-Conjugate Complex Signals)
\\
=====Multiply (Real Signals) =====
{{ multiplypic1.png}}
The Multiply block multiplies two signals together. This can be used for modulation or other design situations where a multiply operation is needed. 

Right-click the block to add more pins by selecting **Add Algorithm > IC N > Multiplication**.

Care must be taken in using this block to avoid computational overflows, for example, putting in a value of 16 in 5.23 format, whose limit is 15.999999.

=====Multiply (Complex Signals) =====
This module can be used to multiply two complex signals in block schematic. 
\\
{{ :resources:tools-software:sigmastudio:toolbox:basicdsp:cmul.jpg?nolink |}}
\\
            (x+iy) * (u+iv) = (xu - yv) + i(xv + yu)
\\
Note:- The Context Menu "Input Source" option added to this module to select the algorithm for Complex FFT and Real FFT as shown below
//
{{ :resources:tools-software:sigmastudio:toolbox:basicdsp:cmplxmultcntxtmenu.png?nolink |}}
//
====Input Pins====
^Name^Format [int/dec] - [control/audio]^Function Description^
|Pin 0: Operand 1  |complex| Input complex signal 1|
|Pin 1: Operand 2  |complex| Input Complex signal 2|
\\
====Output Pins====
^Name^Format [int/dec] - [control/audio]^Function Description^
|Pin 0: Output Signal| Complex | Complex output signal|
\\
\\
====Grow Algorithm====
input pins can be grown up to 8 channels. 
 
\\

=====Multiply (Complex-Real Signals) =====
This module can be used to multiply one complex-one real signal in block schematic. 
\\
 {{ :resources:tools-software:sigmastudio:toolbox:basicdsp:complexrealmult.jpg?nolink |}}
\\
               (x+iy) * r = (xr) + i (yr) 
\\
====Input Pins====
^Name^Format [int/dec] - [control/audio]^Function Description^
|Pin 0: Complex Input |complex| Input complex signal|
|Pin 1: Real Input  |Dec| Input Real Signal|
\\
====Output Pins====
^Name^Format [int/dec] - [control/audio]^Function Description^
|Pin 2: Output Signal| Complex | Complex output signal|
\\
\\
====Grow Algorithm====
Grow Algorithm is not supported. 
Add Algorithm is supported.
\\

=====Multiply(Complex-Conjugate Complex Signals) =====
This module can be used to multiply one complex-one conjugate complex signal in block schematic. 
\\
{{ :resources:tools-software:sigmastudio:toolbox:basicdsp:compconjcompmult.jpg?nolink |}}
 \\
               (x+iy) * conj(u+iv) = (xu + yv) -i (xv - yu)
\\
Note:- The Context Menu "Input Source" option added to this module to select the algorithm for Complex FFT and Real FFT as shown below
//
{{ :resources:tools-software:sigmastudio:toolbox:basicdsp:cmplxmultcntxtmenu.png?nolink |}}
//

====Input Pins====
^Name^Format [int/dec] - [control/audio]^Function Description^
|Pin 0: Complex Input |complex| Input complex signal 1|
|Pin 1: Complex Input |Dec| Input Complex signal 2|
\\
====Output Pins====
^Name^Format [int/dec] - [control/audio]^Function Description^
|Pin 2: Output Signal| Complex | Complex output signal|
\\
\\
====Grow Algorithm====
Grow Algorithm is not supported. 
Add Algorithm is supported.
\\


\\
====Supported DSPs=====
ADAU145x (Block Schematic only)
\\
\\
====Example Usage=====
This can be used to multiply two signals' FFT results as shown below. 
{{ :resources:tools-software:sigmastudio:toolbox:basicdsp:cmul2.jpg?nolink |}}
Analog Devices Wiki

Page Tools
