http://www.designers-guide.org/Forum/YaBB.pl - The Designer's Guide Community Forum en-us The Designer's Guide Community Forum Thu, 17 May 2012 19:37:58 +0000 http://blogs.law.harvard.edu/tech/rss 30 http://www.designers-guide.org/Forum/YaBB.pl?num=1337279818/0#0 The Designer's Guide Community Forum/Physical Verification, Extraction and Analysis http://www.designers-guide.org/Forum/YaBB.pl?num=1337279818/0#0 Can anybody have idea how to convert txt drawing layer to txt label layer while creatind calibreview for parasitic extraction http://www.designers-guide.org/Forum/YaBB.pl?num=1336536890/5#5 The Designer's Guide Community Forum/Analog Design http://www.designers-guide.org/Forum/YaBB.pl?num=1336536890/5#5 <b><a class="message" href="http://www.designers-guide.org/Forum/YaBB.pl?num=1336536890/0#3">ACWWong wrote</a> on May 10^th, 2012, 8:29pm:</b><br /><div class="quote" style="width: 90%">Hi Rob, I think you missed the *ft part of the FOM.<br /> </div><br /><br />I did miss that. Thanks. http://www.designers-guide.org/Forum/YaBB.pl?num=1337206131/1#1 The Designer's Guide Community Forum/RF Design http://www.designers-guide.org/Forum/YaBB.pl?num=1337206131/1#1 There are two good physical reasons for gain compression:<br /><br />1. A transistor can run out of current (cutoff on negative swings).<br />2. The output swing reaches the supply limit and cannot increase further.<br /><br />Once an amplifier waveform reaches either a current or voltage limit the output ceases to increase at the same rate the input increases.<br /><br />Now it is physically possible for k3 &gt; 0 (gain expansion) before the amplifier reaches a physical supply limit. This happens, by design, in class AB amplifiers where the DC current in the amplifier is a function of the input signal (DC current increases with increased input power), but eventually the supply limit takes over and the amplifier enters compression following the gain expansion.<br /> http://www.designers-guide.org/Forum/YaBB.pl?num=1336913688/10#10 The Designer's Guide Community Forum/AMS Simulators http://www.designers-guide.org/Forum/YaBB.pl?num=1336913688/10#10 Yeps got that. Just for the sake of checking a designs functionality how can I turn of these timing checks using -notimingcheck if I use ADE to perform ams simulations? http://www.designers-guide.org/Forum/YaBB.pl?num=1337157047/1#1 The Designer's Guide Community Forum/Entry Tools http://www.designers-guide.org/Forum/YaBB.pl?num=1337157047/1#1 Yawei,<br />Cadence SKILL help says:<br />&quot;Returns the ID of the object located at the coordinates given in l_list.&quot;<br /> <br />- B O E http://www.designers-guide.org/Forum/YaBB.pl?num=1337140970/3#3 The Designer's Guide Community Forum/Analog Design http://www.designers-guide.org/Forum/YaBB.pl?num=1337140970/3#3 hello,<br />When you a sample a signal with Fs sampling rate, frequency components above fs will be fold back into fs. Any real signal is symmetric around fs/2.<br /><br />Thanks,<br />Raj. http://www.designers-guide.org/Forum/YaBB.pl?num=1337175350/1#1 The Designer's Guide Community Forum/RF Design http://www.designers-guide.org/Forum/YaBB.pl?num=1337175350/1#1 hello,<br />what kind of signal you are going to delay? If it is a digital signal better go for gilbert mixer which gives variable phase shift, but it need I &amp;Q signals. If they pure analog i donno may be RC phase shifter with Controlled R<br /><br />Thanks,<br />raj. http://www.designers-guide.org/Forum/YaBB.pl?num=1337175256/0#0 The Designer's Guide Community Forum/Other Measurements http://www.designers-guide.org/Forum/YaBB.pl?num=1337175256/0#0 This Topic has been moved to <a href="http://www.designers-guide.org/Forum/YaBB.pl?num=1337175255/0">Circuit Simulators</a> by Forum Administrator. http://www.designers-guide.org/Forum/YaBB.pl?num=1337175255/0#0 The Designer's Guide Community Forum/Circuit Simulators http://www.designers-guide.org/Forum/YaBB.pl?num=1337175255/0#0 Hi,<br /><br />Has there anyone used hspice or hspicerf to measure the startup time of an oscillator? I have tried but, the oscillator waveform remains the same. Can anyone please help? Thanks <img src="http://www.designers-guide.org/Forum/Templates/Forum/default/smiley.gif" border="0" alt="Smiley" /> http://www.designers-guide.org/Forum/YaBB.pl?num=1336913838/5#5 The Designer's Guide Community Forum/Analog Design http://www.designers-guide.org/Forum/YaBB.pl?num=1336913838/5#5 The output voltages of OTA are out of the normal operating range of your two CMFB circuits.<br /><br />Yawei