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https://designers-guide.org/forum/YaBB.pl Measurements >> Other Measurements >> PSRR for biases https://designers-guide.org/forum/YaBB.pl?num=1223402911 Message started by Tlaloc on Oct 7th, 2008, 11:08am |
Title: PSRR for biases Post by Tlaloc on Oct 7th, 2008, 11:08am What is typically spec'ed for supply rejection for bias blocks providing currents? Without a signal path, can we even have a PSRR, or do people just report the transconductance gain from supply voltage to output current? Thanks. Adam |
Title: Re: PSRR for biases Post by rf-design on Oct 7th, 2008, 12:27pm A good practice id the define maxmium noise voltage of the bias current or noise voltage if the supply, ground or substrate is noisy. Over the common nets which does not have ZERO impedance noise is introduced. That gives also guidance for the noise generators. So a noise budget is a good way. |
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