Hi Guys, If you've ever been interested in cascaded integrator-comb (CIC) filters, you might enjoy reading my blog about the history of those filters at: http://www.dsprelated.com/showarticle/160.php See Ya', [-Rick-]
CIC Filters: The Untold Story
Started by ●February 21, 2012
Reply by ●February 21, 20122012-02-21
On Tue, 21 Feb 2012 08:56:15 -0800, Rick Lyons <R.Lyons@_BOGUS_ieee.org> wrote:> > >Hi Guys, > If you've ever been interested in cascaded >integrator-comb (CIC) filters, you might enjoy >reading my blog about the history of >those filters at: > >http://www.dsprelated.com/showarticle/160.php > >See Ya', >[-Rick-]Cool! Thanks for that, Rick. Yet another example of a significant development where the full understanding and mathematical foundation came later, rather than earlier. Eric Jacobsen Anchor Hill Communications www.anchorhill.com
Reply by ●February 21, 20122012-02-21
On Feb 21, 11:56�am, Rick Lyons <R.Lyons@_BOGUS_ieee.org> wrote:> Hi Guys, > � �If you've ever been interested in cascaded > integrator-comb (CIC) filters, you might enjoy > reading my blog about the history of > those filters at: > > http://www.dsprelated.com/showarticle/160.php > > See Ya', > [-Rick-]1. You make it difficult to see (one buried "I") in the story , but you were there amidst the folks (see point 2) who developed this. 2. I infer from your story that you think Newbold deserved some recognition for this and, in part, your story is to put it down that he should not be forgotten in this story. 3. Newbold's new book is gonna suck eggs compared to your book :-)
Reply by ●February 21, 20122012-02-21
Hi Rick,>Hi Guys, > If you've ever been interested in cascaded >integrator-comb (CIC) filters, you might enjoy >reading my blog about the history of >those filters at: > >http://www.dsprelated.com/showarticle/160.phpI find it strange that in 1979 the guy didn't have access to some form of computer to run a model and produce some plots. Gee, I thought we were starved of resources at that time. :-) Its a pity you described the CIC in isolation from some of the related work on filtering in a world where transistors aren't cheap. The CIC isn't so different from a number of things which predate it. The late 70s was a fertile time for people driving the multipliers out of DSP algorithms. Regards, Steve
Reply by ●February 22, 20122012-02-22
On 2/21/2012 11:56 AM, Rick Lyons wrote:> > > Hi Guys, > If you've ever been interested in cascaded > integrator-comb (CIC) filters, you might enjoy > reading my blog about the history of > those filters at: > > http://www.dsprelated.com/showarticle/160.phpThat's a very nice writeup, especially reading between the lines. Incidentally, my HP-35 still works. When new, it cost $400. RCA generously paid half. Jerry -- Engineering is the art of making what you want from things you can get. �����������������������������������������������������������������������
Reply by ●February 22, 20122012-02-22
Hi Guys, I'm happy you enjoyed that little history of CIC filters. It's a shame that Hogenauer chose not tell me what events, or what problems he was working on, that led him to 'invent' the CIC filter. Such things are always interesting to me. See Ya', [-Rick-]
Reply by ●February 23, 20122012-02-23
On Feb 21, 11:56�am, Rick Lyons <R.Lyons@_BOGUS_ieee.org> wrote:> Hi Guys, > � �If you've ever been interested in cascaded > integrator-comb (CIC) filters, you might enjoy > reading my blog about the history of > those filters at: > > http://www.dsprelated.com/showarticle/160.php > > See Ya', > [-Rick-]I appreciate the history here. Too bad we won't know all of the details. Clay
Reply by ●February 23, 20122012-02-23
On Feb 23, 3:26�pm, Clay <c...@claysturner.com> wrote:> On Feb 21, 11:56�am, Rick Lyons <R.Lyons@_BOGUS_ieee.org> wrote: > > > Hi Guys, > > � �If you've ever been interested in cascaded > > integrator-comb (CIC) filters, you might enjoy > > reading my blog about the history of > > those filters at: > > >http://www.dsprelated.com/showarticle/160.php > > > See Ya', > > [-Rick-] > > I appreciate the history here. Too bad we won't know all of the > details. > > ClayIncredible work was done at ESL. Some public info is available on wikipedia. http://en.wikipedia.org/wiki/ESL_Incorporated
Reply by ●February 23, 20122012-02-23
On Thu, 23 Feb 2012 14:09:21 -0800 (PST), John <sampson164@gmail.com> wrote:>On Feb 23, 3:26�pm, Clay <c...@claysturner.com> wrote: >> On Feb 21, 11:56�am, Rick Lyons <R.Lyons@_BOGUS_ieee.org> wrote: >> >> > Hi Guys, >> > � �If you've ever been interested in cascaded >> > integrator-comb (CIC) filters, you might enjoy >> > reading my blog about the history of >> > those filters at: >> >> >http://www.dsprelated.com/showarticle/160.php >> >> > See Ya', >> > [-Rick-] >> >> I appreciate the history here. Too bad we won't know all of the >> details. >> >> Clay > >Incredible work was done at ESL. Some public info is available on >wikipedia. > >http://en.wikipedia.org/wiki/ESL_IncorporatedHi John, Ah ha. I didn't know about that wiki web page. Thanks. That web page mentioned the 9188 killings at ESL. As for the murdering software engineer, I didn't know him but my office was right next door to the office of the manager that fired Farley for his incessant stalking of the female employee Laura Black. Luckily for me Farley wanted to kill the woman rather than the guy who fired him. Farley shot Laura Black in the arm. Hollywood movies portray people who are shot in the arm as being OK, NO problem really. An aquaintence of mine who knows Laura Black told me that she never regained the use of that arm. When Farley went into the building shooting people at random, someone called the Sunnyvale Police who showed up pretty quickly. But then the Police commander-on-the-scene forbid his sharpshooters from 'nailing' Farley though a window. According to an ESL technician friend of mine who was hiding behind Police cars, a sharp-shooter told the commander "I have him in my sights!" The commander, afraid of making a command decision that might endanger his career said, "That may not be the shooter. That may be an employee wearing the shooter's clothes." How F---ing insane! Sooooo, ...the Police waited in the parking lot for over three hours, while wounded people were bleeding to death, and the commander received no criticism after it was all over. Why did the Police send sharpshooters to ESL if they weren't permitted to shoot(!!)? Some time after Farley decided to stop killing people, the Police finally lured him into surrendering by offering him a sandwich from the Togo's Sandwich Shop across the street from the ESL building. About 2 weeks after the incident we employees were allowed to go into the building where the shootings took place. I'll never forget: in a hallway office wall I saw a bullet hole. I followed that hole. It went through the hallway wall, through three end-to-end metal bookcases, and out the opposing wall. So much for hiding behind things when some bastard is shooting a rifle. (I've never been in military combat.) There was a made-for-TV about the whole incident. Of all people, the movie producers chose Richard Thomas (the sweet guy who played John Boy on the popular 'Waltons' TV show) to portray Farley. OK, enough of my ranting here. Remind your families--tell them, "Be happy when I come home from work today. Some people never come home from work." See Ya', [-Rick-]
Reply by ●February 23, 20122012-02-23
On Feb 23, 7:22�pm, Rick Lyons <R.Lyons@_BOGUS_ieee.org> wrote:> On Thu, 23 Feb 2012 14:09:21 -0800 (PST), John <sampson...@gmail.com>> OK, enough of my ranting here. �Remind your > families--tell them, "Be happy when I come > home from work today. Some people never come > home from work." >Listen to the last lines of the wreck of the Ole' 97: http://www.youtube.com/watch?v=FHKxk719AMc&feature=related> See Ya', > [-Rick-]
