[time-nuts] Low noise power supply

[David C. Partridge]

Hmmmm I wasn't impressed.  The 'scope screen shot of noise levels on the outputs used 20mV/division, and the thickness of the regulated traces told us precisely nothing.  Now if the author had measured 20uV noise over a BW of 10Hz to 100kHz (about 63nV/rtHz), or 3uV over the same BW (about 10nV/rtHz), I'd have started to get interested.  

However as no claims were made, I took the title of "Ultra-Low Noise" with a large shovel of salt.   


Regards,
David Partridge


-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On Behalf Of EWKehren at aol.com
Sent: 08 March 2011 21:41
To: time-nuts at febo.com
Subject: [time-nuts] Low noise power supply

There is an interesting article in the March 2011 Electronic Products magazine "design an ultra low noise supply for analog circuits. It is a combination of switcher and LDO's and written by P Hunter TI so it may also  be available on their site.
Bert Kehren
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