Re: [time-nuts] LTC6957 internal architecture

2015-07-08 Thread Magnus Danielson

Hi Bruce,

On 05/26/2015 01:39 AM, Bruce Griffiths wrote:

The following patent hints that the LTC6957 front end
probably consists of several cascaded long tailed pair
differential amplifier stages each with a selectable
bandwidth set by capacitors shunting the collector load
resistors. : US8319551
The input limiter is in effect a Collins style limiter with
selectable bandwidth for each stage to reduce the noise
with respect to a comparator which typically has several
high gain wide bandwidth cascaded differential amplifier
stages.


Interesting patent indeed.

Nothing new in principle for those following the Collins school, but 
interesting to see how it spreads.


Cheers,
Magnnus
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Re: [time-nuts] LTC6957 internal architecture

2015-05-26 Thread David C. Partridge
With all this talk of the LT6957 I'm wondering if there's interest in a re-spin 
of my frequency divider with one of these at the front end instead.

Regards,
David Partridge 
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Bruce Griffiths
Sent: 26 May 2015 00:40
To: time-nuts@febo.com
Subject: [time-nuts] LTC6957 internal architecture

The following patent hints that the LTC6957 front end probably consists of 
several cascaded long tailed pair differential amplifier stages each with a 
selectable bandwidth set by capacitors shunting the collector load resistors. : 
US8319551 The input limiter is in effect a Collins style limiter with 
selectable bandwidth for each stage to reduce the noise with respect to a 
comparator which typically has several high gain wide bandwidth cascaded 
differential amplifier stages.

Bruce


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[time-nuts] LTC6957 internal architecture

2015-05-25 Thread Bruce Griffiths
The following patent hints that the LTC6957 front end 
probably consists of several cascaded long tailed pair 
differential amplifier stages each with a selectable 
bandwidth set by capacitors shunting the collector load 
resistors. : US8319551
The input limiter is in effect a Collins style limiter with 
selectable bandwidth for each stage to reduce the noise 
with respect to a comparator which typically has several 
high gain wide bandwidth cascaded differential amplifier 
stages.

Bruce


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