[time-nuts] noisy varactor diodes

lists at lazygranch.com lists at lazygranch.com
Wed Dec 19 23:18:11 UTC 2012

Paralleling devices reduces noise. Why do you think otherwise? Noise will be reduced by the square root of the number of devices you parallel.

-----Original Message-----
From: cdelect at juno.com
Sender: time-nuts-bounces at febo.com
Date: Wed, 19 Dec 2012 14:43:02 
To: <time-nuts at febo.com>
Reply-To: Discussion of precise time and frequency measurement
	<time-nuts at febo.com>
Subject: [time-nuts] noisy varactor diodes

The HP sceme in the patent refers to an array of series and parallel
diodes to reduce noise.

Just paralleling them does not reduce the noise!

The 4 paralleled in the 5065  are to give enough phase deviation for the
low modulation level applied.  (150mv)

The symptom was a fluctuating 2nd harmonic meter reading and coresponding
fluctuations at the A7 TP2 test point.

John I could not see the info you refered to?


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