Dear time nuts,
Background:
I have built a GPS receiver based around the SE4120L front end IC [1].
I used a KT3225 TCXO [2] at 16.3676MHz driving the front end through
a 10nF series capacitor as in the example circuit in [1]. Inside the
front end, this oscillator is multiplied up to form a
Henry Hallam wrote:
Dear time nuts,
Background:
I have built a GPS receiver based around the SE4120L front end IC [1].
I used a KT3225 TCXO [2] at 16.3676MHz driving the front end through
a 10nF series capacitor as in the example circuit in [1]. Inside the
front end, this oscillator is
--
From: Henry Hallam he...@pericynthion.org
Sent: Wednesday, August 04, 2010 1:46 PM
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: [time-nuts] Buffer / distribution amplifier for TCXO
Dear time nuts,
Background:
I have built
On Wed, Aug 4, 2010 at 1:50 PM, Bruce Griffiths
bruce.griffi...@xtra.co.nz wrote:
The TCXO output waveform is presumably a clipped sinewave as required by the
SE4120L?
I posted the waveform at
http://www.pericynthion.org/stuff/KT3225_500mV_per_div.jpg
Does that count as clipped sine? If not,
receiver
after attenuating.
Bob
--
From: Henry Hallam he...@pericynthion.org
Sent: Wednesday, August 04, 2010 1:46 PM
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: [time-nuts] Buffer / distribution amplifier
Henry Hallam wrote:
On Wed, Aug 4, 2010 at 1:50 PM, Bruce Griffiths
bruce.griffi...@xtra.co.nz wrote:
The TCXO output waveform is presumably a clipped sinewave as required by the
SE4120L?
I posted the waveform at
http://www.pericynthion.org/stuff/KT3225_500mV_per_div.jpg
Does that
--
From: Henry Hallam he...@pericynthion.org
Sent: Wednesday, August 04, 2010 1:46 PM
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: [time-nuts] Buffer / distribution amplifier for TCXO
Dear time nuts,
Background:
I
measurementtime-nuts@febo.com
Subject: [time-nuts] Buffer / distribution amplifier for TCXO
Dear time nuts,
Background:
I have built a GPS receiver based around the SE4120L front end IC [1].
I used a KT3225 TCXO [2] at 16.3676MHz driving the front end through
a 10nF series capacitor
Bruce Griffiths wrote:
In which case a linear distribution amplifier is probably required.
With only a ~3V supply available, options for the distribution
amplifier topology are somewhat limited.
In principle you could use an emitter follower driving 4 other emitter
followers with a resistor
.
Bob
--
From: Henry Hallamhe...@pericynthion.org
Sent: Wednesday, August 04, 2010 1:46 PM
To: Discussion of precise time and frequency
measurementtime-nuts@febo.com
Subject: [time-nuts] Buffer / distribution amplifier for TCXO
Dear
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