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Simulators >> Circuit Simulators >> PSRR cadence
https://designers-guide.org/forum/YaBB.pl?num=1442945278

Message started by pekachoo007 on Sep 22^nd, 2015, 11:07am

Title: PSRR cadence
Post by pekachoo007 on Sep 22^nd, 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 23^rd, 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 25^th, 2015, 9:57am

2 outputs 0.2 & 2 V.

Title: Re: PSRR cadence
Post by sheldon on Sep 28^th, 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 30^th, 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 5^th, 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.