Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Looking for a high speed DDS [400 MHz]

Status
Not open for further replies.

No one

Full Member level 5
Full Member level 5
Joined
May 11, 2005
Messages
287
Helped
4
Reputation
8
Reaction score
2
Trophy points
1,298
Activity points
3,425
Hello everyone;
Please introduce me DDS with output frequency more than 400MHz.
 

mwmmboy

Full Member level 2
Full Member level 2
Joined
May 18, 2001
Messages
134
Helped
8
Reputation
16
Reaction score
2
Trophy points
1,298
Activity points
979
Re: High Speed DDS [hlp]

Never used at so high frequency.. try search on analog site

bye
 

No one

Full Member level 5
Full Member level 5
Joined
May 11, 2005
Messages
287
Helped
4
Reputation
8
Reaction score
2
Trophy points
1,298
Activity points
3,425
Re: High Speed DDS [hlp]

Hello mwmmboy;
In Analog website we find only DDSes up to about 400MHz.
 

Circuit_seller

Full Member level 5
Full Member level 5
Joined
Sep 23, 2002
Messages
300
Helped
17
Reputation
34
Reaction score
7
Trophy points
1,298
Activity points
2,350
Re: High Speed DDS [hlp]

Hi

Check this part: AD9858.
Its sampling rate is 1GHz.


Regards
 

No one

Full Member level 5
Full Member level 5
Joined
May 11, 2005
Messages
287
Helped
4
Reputation
8
Reaction score
2
Trophy points
1,298
Activity points
3,425
Re: High Speed DDS [hlp]

Hello Circuit_seller;
We saw it. We need a DDS with higher frequency output.
 

Circuit_seller

Full Member level 5
Full Member level 5
Joined
Sep 23, 2002
Messages
300
Helped
17
Reputation
34
Reaction score
7
Trophy points
1,298
Activity points
2,350
Re: High Speed DDS [hlp]

Hi

I have seen somewhere that there were DDSs with sampling frequency more than 1GHz which designed using GaAs.
Unfortunately i can not remeber where. Also remember that the drawback of that products was high price and low resolution of their DACs(e.g. 8-bit) which yields to worse SFDR than others.

Regards
 

    No one

    Points: 2
    Helpful Answer Positive Rating

No one

Full Member level 5
Full Member level 5
Joined
May 11, 2005
Messages
287
Helped
4
Reputation
8
Reaction score
2
Trophy points
1,298
Activity points
3,425
Re: High Speed DDS [hlp]

Hello Circuit_Seller;
Can you advise me any paper/article/link/book regarding this problem?
 

Circuit_seller

Full Member level 5
Full Member level 5
Joined
Sep 23, 2002
Messages
300
Helped
17
Reputation
34
Reaction score
7
Trophy points
1,298
Activity points
2,350
Re: High Speed DDS [hlp]

Hi

If your application is high frequency but fmax - fmin is less than 200MHz, you can simply use an Analog Devices DDS and mix its output with a fixed oscilator. but if in your application fmax - fmin is so high you can use mixed techniques such as hyprid PLL - DDS synthesizer. In this configuration output of an DDS is multiplyed with a PLL.
I think if you specify your design requirements we can help you more.

Regards
 

    No one

    Points: 2
    Helpful Answer Positive Rating

Doka

Junior Member level 3
Junior Member level 3
Joined
Nov 17, 2004
Messages
26
Helped
3
Reputation
6
Reaction score
0
Trophy points
1,281
Location
Russia
Activity points
265
Re: High Speed DDS [hlp]

No one said:
Hello everyone;
Please introduce me DDS with output frequency more than 400MHz.

Why just need DDS-method?
If you approach only DDS: try apply after DDS analog freqency-multiply

other way: DDS_sample_freqency - may be not equal to 2*Output_bandwidth
By DDS_sample_freqency=1Ghz is possible get output frequency higher 1 GHz
this method describe in more AD DDS datasheets
 

    No one

    Points: 2
    Helpful Answer Positive Rating
Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top