[time-nuts] Low noise power supply

[ehydra]

For me, this looks like a advertisement campaign only. Not very 
sophisticated or ingenious. Read that you don't need LC-filters at the 
output because of the LDOs. *lol* If the designer ever heard of corner 
frequency??
And the ISL9000A is the same.


- Henry

-- 
ehydra.dyndns.info


David C. Partridge schrieb:
> 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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