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https://designers-guide.org/forum/YaBB.pl Design >> Analog Design >> Differential Amplifier simulation using Synopsys Hspice https://designers-guide.org/forum/YaBB.pl?num=1506399337 Message started by ehsanaiman on Sep 25th, 2017, 9:15pm |
Title: Differential Amplifier simulation using Synopsys Hspice Post by ehsanaiman on Sep 25th, 2017, 9:15pm Hello, I want to ask some questions on this differential amplifier circuit that I referred in article "Design of CMOS Two-stage Operational Amplifier for ECG Monitoring System Using 90nm Technology by Moulahcene F Bouguechal N Benacer I Hanfoug S". 1. Can somebody explain to me about current mirror operation in simpler words? 2. If I want to build and simulate the schematic, do I need to add dc current source Iref in my schematic? 3. Iref is input current or current produced by current mirror? Im using Hspice with 90nm technology. Thank you. |
Title: Re: Differential Amplifier simulation using Synopsys Hspice Post by jdp on Oct 28th, 2017, 11:24pm 1. current mirror operation - read any textbook (e.g., CMOS book of RJ Baker, Wiley pub.) 2 & 3. You can start with an ideal idc source for initial simulations, but for practical implementation, you need a current sink (which can be a current mirrored from a current ref. ckt, see RJ Baker's book for example). |
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