[PEDA] RF footprints

2002-02-20 Thread Abd ul-Rahman Lomax
At 12:42 PM 2/20/2002 -0800, JaMi Smith wrote: >(Go ahead, ask Protel what >an RF Choke is, and how to make one in Protel). Printed components tend to not have fixed sizes, unless they have fixed values or functions. If one wanted to make an RF choke footprint, one would have to have a separat

Re: [PEDA] RF footprints

2002-02-20 Thread Ian Wilson
On 04:43 PM 20/02/2002 -0500, Abd ul-Rahman Lomax said: >At 12:42 PM 2/20/2002 -0800, JaMi Smith wrote: > >>(Go ahead, ask Protel what >>an RF Choke is, and how to make one in Protel). > >Printed components tend to not have fixed sizes, unless they have fixed >values or functions. If one wanted

Re: [PEDA] RF footprints

2002-02-20 Thread JaMi Smith
Abdul, Well ~ You're almost right . . . A typical RF Choke on a PCB is a certain length conductor (typically 1/4 wavelength), which is acting as an inductor, from one active part of an RF circuit (typically the Collector of an RF Transistor) to another part of the circuit, typically power (or s

Re: [PEDA] RF footprints

2002-02-20 Thread lloyd . good
Not all problems in design are solved by software tools, however finding an adequate work around is often easier than adding the functionality to the tool set. I have only had limited experience in RF layout and coincidentally it did involve an inductor supplying power to an RF transistor. In sc

Re: [PEDA] RF footprints

2002-02-20 Thread JaMi Smith
ssage- From: Ian Wilson [mailto:[EMAIL PROTECTED]] Sent: Wednesday, February 20, 2002 2:38 PM To: Protel EDA Forum Subject: Re: [PEDA] RF footprints On 04:43 PM 20/02/2002 -0500, Abd ul-Rahman Lomax said: >At 12:42 PM 2/20/2002 -0800, JaMi Smith wrote: > >>(Go ahead, ask Protel what &

Re: [PEDA] RF footprints

2002-02-20 Thread Ian Wilson
On 02:46 PM 20/02/2002 -0800, JaMi Smith said: >Abdul, > >Well ~ > >You're almost right . . . Rant On What the hell is your point - are you deliberately being prickly? My turn to be pedantic and pick up on your misconceptions. Am I peeved - yes. JaMi (I persist in this weird spelling since

Re: [PEDA] RF footprints

2002-02-20 Thread JaMi Smith
o produce errors, or minimally "Special Circumstances" which may not be understood by the next engineer or designer that works on the board. JaMi Smith -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Wednesday, February 20, 2002 3:21 PM To: Protel ED

Re: [PEDA] RF footprints

2002-02-20 Thread Ian Wilson
On 02:46 PM 20/02/2002 -0800, JaMi Smith said: >Abdul, > >Well ~ > >You're almost right . . . > >A typical RF Choke on a PCB is a certain length conductor (typically 1/4 >wavelength), which is acting as an inductor, from one active part of an >RF circuit (typically the Collector of an RF Transisto

Re: [PEDA] RF footprints

2002-02-20 Thread JaMi Smith
his issue to be presented to Protel. Really, not ranting, JaMi -Original Message- From: Ian Wilson [mailto:[EMAIL PROTECTED]] Sent: Wednesday, February 20, 2002 3:25 PM To: Protel EDA Forum Subject: Re: [PEDA] RF footprints On 02:46 PM 20/02/2002 -0800, JaMi Smith said: >Abdul, > &g

Re: [PEDA] RF footprints

2002-02-20 Thread Don Ingram
> > What the hell is your point - are you deliberately being prickly? My turn > to be pedantic and pick up on your misconceptions. Am I peeved - yes. JaMi > (I persist in this weird spelling since you do but I must admit that I > thought it was a typo when I first saw it) Might either be a tro

Re: [PEDA] RF footprints

2002-02-20 Thread Ian Wilson
On 04:25 PM 20/02/2002 -0800, JaMi Smith said: >In view of your understanding of the problem, I take it then that you >too agree that there is a need for this issue to be presented to Protel. > >Really, not ranting, > >JaMi No, but care must be taken with language - mine was carefully chosen to

Re: [PEDA] RF footprints

2002-02-20 Thread Andrew Jenkins

Re: [PEDA] RF footprints

2002-02-20 Thread Damon Kelly
ruary 2002 11:25 > To: Protel EDA Forum > Subject: Re: [PEDA] RF footprints > > > On 04:25 PM 20/02/2002 -0800, JaMi Smith said: > > >In view of your understanding of the problem, I take it then that you > >too agree that there is a need for this issue to be > p

Re: [PEDA] RF footprints

2002-02-20 Thread Mike Ingle
- From: Damon Kelly [mailto:[EMAIL PROTECTED]] Sent: Wednesday, February 20, 2002 5:51 PM To: Protel EDA Forum Subject: Re: [PEDA] RF footprints Yes, I would really like a "Tie Net" entity! Particularly (or most commonly) for the "analog ground" and "digital ground&qu

Re: [PEDA] RF footprints

2002-02-21 Thread Randol Mark-ryvw50
> A typical RF CHOKE is lossy (deliberately) and hence one > would not normally > use a relatively high-Q PCB track to implement a choke. Er, not necessarily. Having a lossy choke (series DC) is good in that it widens the bandwidth, but note that if you have a high power amplifier, drawing

Re: [PEDA] RF footprints

2002-02-21 Thread Darren Moore
Hi Randol, > > Brian G. and others wrote a spiral track generator for > > Protel. Use that. > > OOooo!! Where's that?! Does it lock the tracks together so > that they don't get independently pulled and the group can be > drug together? I've not tried to make a "footprint" like > this,

Re: [PEDA] RF footprints

2002-02-21 Thread Brian Guralnick
kbit.mp3 -1.4M - --- - Original Message - From: "Darren Moore" <[EMAIL PROTECTED]> To: "'Protel EDA Forum'" <[EMAIL PROTECTED]> Sent: Thursday, February 21, 2002 5:44 PM Subject: Re: [PEDA] RF footprints | | Hi Randol, |