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Hello all In dire need of UC1834 TI voltage regulator IC model..please do reply if anyone has one Thanks.

Hello Macy, LTspice accepts .model with and without brackets. .model 2N22222 NPN (Is=1e-16 BF=100) .model 2N22222 NPN Is=1e-16 BF=100 I recommend to use brackets, because it's more common and it will

found this old thing ...similar, somebody may want it. .model PN4250 PNP(Is=6.734f Xti=3 Eg=1.11 Vaf=45.7 Bf=388.2 Ne=1.806 + Ise=6.734f Ikf=.205 Xtb=1.5 Br=2.635 Nc=2 Isc=0 Ikr=0 Rc=1.67 + Cjc=6.2p

Thank you for your answer, it's very kind

The grandfather of all spice programs was a phd thesis in one of the California universities. it was even called spice which indicated a ( S? Program for Integrated Circuit Engineering.) it's primary

Hello Jean, The circuit had a lot of mistakes. I tried to correct them. Please watch all the circles and my other comments in the schematic. My files: Files > Temp > AmpJCA_1.zip I have used most of

In message <kseg1d+mptm@...>, dated Sat, 20 Jul 2013, legg@... writes: It's normally completely impossible to know when anything really started. I know that an ex-colleague was doing

The old W98 installation on this machine has files in the SWCAD directory, probably copied from an installation CD, that have 'modified' time stamps of Oct'99. This is likely when the CD contents

There is an extra square dot on the base of Q13, which looks odd. It implies there is an extra wire junction there. I think this is harmless (the Netlist looks OK). I mention it because it is part of

It is missing the symbol for "LF353". That is the error message I get when trying to load your file into LTspice. If your schematic uses any new symbols or models or subcircuits that didn't come with

In message <1374329454.5183.YahooMailNeo@...>, dated Sat, 20 Jul 2013, abeillé jean-claude <jean_claudeabeille@...> writes: It is missing the symbol LF353. It is always

Thank you for the tutorial, I wouldn't have found out in what folder - temp - to store the file. OK, it's done, file name is AmpJCA.asc. ________________________________ ??: LTspice@...

In message <kse0bg+gakv@...>, dated Sat, 20 Jul 2013, Helmut <helmutsennewald@...> writes: Thank you. I thought that the OP had limited his options too much. He can do it using the

Hello John, One would have to make a transformer based ob B-sources plus inductors. Google: ideal transformer spice Best regards, Helmut

Hello,Helmut, ? Thank you so much. my problem has soleved! ? Shukichi ________________________________ To: LTspice@... Sent: Saturday, July 20, 2013 6:26 PM Subject: [LTspice] Re:

In message <ksdlam+2tic@...>, dated Sat, 20 Jul 2013, Helmut <helmutsennewald@...> writes: But is there another way to change K at a specified time during a .tran simulation? -- OOO -

In message <MfjOdgDTQl6RFw$6@...>, dated Sat, 20 Jul 2013, John Woodgate <jmw@...> writes: They were stripped out by the server. The important one is:

Hello Bryan, The answer is no. Everything defined with .param will be evaluated at the beginning of a simulation and is then constant for the whole simulation. Best regards, Helmut

Hello Shukichi, Please take a look the examples from our Files-section. Files > Tut > MEASURE > AC http://tech.groups.yahoo.com/group/LTspice/files/%20Tut/MEASURE/AC/ Best regards, Helmut

Hello. Regarding to AC simulation. I want to know cut off frequency using ".measure" statements. In LT spice help, I found how to describe band-width but I don't know how to describe to find cut off