Glad I could help. Dave
From: [email protected] [mailto:[email protected]] On Behalf Of Narayana Bhagirath T Sent: Wednesday, May 4, 2016 7:34 PM To: [email protected] Subject: Re: Doubt regarding a.c simulation in LT Spice Okay, thank you very much Dave. This clarifies the point that the simulated result is independent of what the power supply is. Thanks again for your time. Regards, Bhagirath On Wed, May 4, 2016 at 10:42 PM, David Cox <[email protected] <mailto:[email protected]> > wrote: Bhagirath: In the AC analysis for Spice the “gain” plot is really a voltage plot. If the input to the amplifier is 1 “volt” then the output would be the gain (in volts, even though the plot is not so labeled). The Spice model in AC is generated without the actual limits of power supplies, etc. included (assume a two-port with R’s, L’s, C’s and gain elements). Dave Cox From: [email protected] <mailto:[email protected]> [mailto:[email protected] <mailto:[email protected]> ] On Behalf Of Narayana Bhagirath T Sent: Tuesday, May 3, 2016 11:59 PM To: [email protected] <mailto:[email protected]> Subject: Doubt regarding a.c simulation in LT Spice Dear All, I am trying to simulate an amplifier circuit(Common-Source to be more specific) in LTSpice to obtain the frequency response. In the a.c analysis, I had to give a small signal amplitude of 1V to get the proper response. If I give 10 mV as the small signal amplitude, I don't get the gain properly, it shows negative values. I am unable to understand why this happens. Should we really give 1V as the small signal amplitude? Please kindly clarify. Thanks and Regards, Bhagirath -- You received this message because you are subscribed to the Google Groups "Electric VLSI Editor" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected] <mailto:[email protected]> . For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "Electric VLSI Editor" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected] <mailto:[email protected]> . For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "Electric VLSI Editor" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected] <mailto:[email protected]> . For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "Electric VLSI Editor" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
