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https://designers-guide.org/forum/YaBB.pl Simulators >> Circuit Simulators >> PSRR cadence https://designers-guide.org/forum/YaBB.pl?num=1442945278 Message started by pekachoo007 on Sep 22nd, 2015, 11:07am |
Title: PSRR cadence Post by pekachoo007 on Sep 22nd, 2015, 11:07am how to find PSRR of a voltage reference circuit in cadence, which has one input and two outputs. |
Title: Re: PSRR cadence Post by sheldon on Sep 23rd, 2015, 9:14pm Is it two outputs like V1=1.25V and V2=2.5V or a differential output? |
Title: Re: PSRR cadence Post by pekachoo007 on Sep 25th, 2015, 9:57am 2 outputs 0.2 & 2 V. |
Title: Re: PSRR cadence Post by sheldon on Sep 28th, 2015, 9:17pm Typically I use transfer function analysis for PSRR. In your case, you run transfer function analysis twice, once for each output. The advantage of transfer function analysis is that you can use one analysis for VDD PSRR, GND PSRR, and CMRR, by properly defining the sources in the testbench. |
Title: Re: PSRR cadence Post by pekachoo007 on Sep 30th, 2015, 3:28am is transfer function analysis is xf analysis? what do you mean by properly defining the sources in the testbench. |
Title: Re: PSRR cadence Post by sheldon on Oct 5th, 2015, 7:56pm You will need to include a voltage supply between gnd! and the DUT, in order to capture, VSS PSRR. For the input, use the ideal_balun and define differential and common mode input sources. |
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