View Single Post
  #27   Report Post  
Posted to sci.electronics.design,alt.binaries.schematics.electronic,sci.electronics.basics
Phil Hobbs Phil Hobbs is offline
external usenet poster
 
Posts: 635
Default "Random" Circuit Needed.

On 4/2/2015 4:51 PM, Jasen Betts wrote:
On 2015-04-02, rickman wrote:
On 4/2/2015 6:48 AM, Jasen Betts wrote:
On 2015-04-01, rickman wrote:
On 4/1/2015 6:31 PM, Jim Thompson wrote:

Do a search on the Xilinx web site for app notes on LFSR. Peter Alfke
published one which adds a few gates to specifically inject the zero
state....

yeah, but no LFSR visits all states.


You haven't seen the app note. Why can't it include the zero state with
modification?


I think there's something about linear feedback that requires the
cycle length to be odd.


Maximum length sequences of even order are perfectly possible, but they
require more feedback taps.

Cheers

Phil Hobbs



--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics

160 North State Road #203
Briarcliff Manor NY 10510

hobbs at electrooptical dot net
http://electrooptical.net