tag:blogger.com,1999:blog-1592992209402300549.post4488662956058671708..comments2024-03-28T08:06:43.198-04:00Comments on The Silicon Graybeard: A Ham Radio Series 11 – Transmission Lines – Part IISiGraybeardhttp://www.blogger.com/profile/00280583031339062059noreply@blogger.comBlogger7125tag:blogger.com,1999:blog-1592992209402300549.post-91676908858592540052020-08-17T22:11:43.633-04:002020-08-17T22:11:43.633-04:00I should have expanded on that, it's digital v...I should have expanded on that, it's digital video, going to an LCD display and a memory card, overlaid with GPS, and speed and distance information. Ritchiehttps://www.blogger.com/profile/08075903551422300106noreply@blogger.comtag:blogger.com,1999:blog-1592992209402300549.post-75313774971772534882020-08-17T14:55:28.426-04:002020-08-17T14:55:28.426-04:00Signal Integrity, EMI, and EMC are all because the...Signal Integrity, EMI, and EMC are all because there is no such thing as digital. It's all Analog, and most of it is RF. We spend a lot of effort trying to get people to think in terms of rise time, not data rate when defining a signal as high speed.Clayton W.https://www.blogger.com/profile/09229588603043239939noreply@blogger.comtag:blogger.com,1999:blog-1592992209402300549.post-12684981435559303442020-08-17T01:56:32.684-04:002020-08-17T01:56:32.684-04:00This comment has been removed by a blog administrator.Packers and Movers in Mumbaihttps://packersmoversmumbaicity.in/noreply@blogger.comtag:blogger.com,1999:blog-1592992209402300549.post-2496052034334600902020-08-16T23:17:54.770-04:002020-08-16T23:17:54.770-04:00That's an easy way to do it in the analog worl...That's an easy way to do it in the analog world. In air, light goes about 11 inches in 1 nanosecond. On a pwb, divide by the square root of the dielectric constant, so around 5-1/2 inches if it's a G-10/FR-4 board. <br /><br />Digital guys use counters for that. <br />SiGraybeardhttps://www.blogger.com/profile/00280583031339062059noreply@blogger.comtag:blogger.com,1999:blog-1592992209402300549.post-24080099649075000272020-08-16T20:33:17.565-04:002020-08-16T20:33:17.565-04:00I note that a board I work on, that has video circ...I note that a board I work on, that has video circuits, has related traces with various degrees of back-and-forth bends. I'm told, as I suspected, that this is for timing purposes. Ritchiehttps://www.blogger.com/profile/08075903551422300106noreply@blogger.comtag:blogger.com,1999:blog-1592992209402300549.post-44080029260798938442020-08-16T19:00:32.101-04:002020-08-16T19:00:32.101-04:00BTDT! Things you can "get away with" at ...BTDT! Things you can "get away with" at 7MHz are pretty dicey at 400MHz, especially just running a wire, and calling it a "ground".<br /><br />I remember when Home Computers started getting pretty fast, and all the articles about how "all of a sudden" the guys designing CPU's and motherboards had to start learning about RF.drjimhttps://www.blogger.com/profile/05647484115197408897noreply@blogger.comtag:blogger.com,1999:blog-1592992209402300549.post-26626815046888646442020-08-16T18:24:19.298-04:002020-08-16T18:24:19.298-04:00Thank you for the (re)fresherThank you for the (re)fresherboronhttps://www.blogger.com/profile/05780356895910449471noreply@blogger.com