I wrote:
The LT1720** works on a 3.3v single supply, and has internal
hysteresis. Just ground one input, ground the other through a
resistor, and attach your AC-coupled signal (best if you can use
equal resistors to ground on the two inputs, but if the signal
termination is 50 ohms the other
>From the data sheet it looks like a megohm range bias resistor is needed (X1
>to X2) as well as the blocking / coupling cap.
Robert LaJeunesse
> Sent: Sunday, November 29, 2015 at 5:15 PM
> From: "Cash Olsen"
> To: time-nuts@febo.com
> Subject: Re: [time-nuts]
How about a part like a:
SN74LVC1GX04DCKR IC CRYSTAL OSC DRIVER SC70-6
With a DC blocking capacitor the part should be self-biasing and give logic
outputs.
--
S. Cash Olsen KD5SSJ
ARRL Technical Specialist
On Sat, Nov 28, 2015 at 7:35 PM, Poul-Henning Kamp
wrote:
> I need to convert a 5MHz 0.2
I wrote:
The LT1720** works on a 3.3v single supply, and has internal
hysteresis. Just ground one input, ground the other through a
resistor, and attach your AC-coupled signal (best if you can use
equal resistors to ground on the two inputs, but if the signal
termination is 50 ohms the other
Am 29.11.2015 um 01:35 schrieb Poul-Henning Kamp:
I need to convert a 5MHz 0.2Vpp AC coupled sine signal to a 3.3V
CMOS compatible logic signal.
The "default" comparator based circuit either requires a negative
supply or 4 resitors for biasing the input and setting the zero level.
(The hysteresi
Poul-Henning wrote:
I need to convert a 5MHz 0.2Vpp AC coupled sine signal to a 3.3V
CMOS compatible logic signal.
The "default" comparator based circuit either requires a negative
supply or 4 resitors for biasing the input and setting the zero level.
(The hysteresis resistor is the same in bot
On Sun, 29 Nov 2015 00:35:31 +
Poul-Henning Kamp wrote:
> Since space is a bit tight, I've been trying to find something like
> a "x10 self-biasing amplifier" but without luck.
BTW: How tight is your space? And what are you constraints regarding
soldering? I'm pretty sure an opamp in an SC-7
I would consider using a LVDS line receiver.
http://www.digikey.com/catalog/en/partgroup/lvds-differential-line-receivers/11820
They are available in SOT-23 package, and can have built-in hysteresis, and
3.3V
CMOS output.
--- Graham
==
On Sat, Nov 28, 2015 at 6:35 PM, Poul-Henning Kamp
wrote
Moin,
On Sun, 29 Nov 2015 00:35:31 +
Poul-Henning Kamp wrote:
> I need to convert a 5MHz 0.2Vpp AC coupled sine signal to a 3.3V
> CMOS compatible logic signal.
>
> The "default" comparator based circuit either requires a negative
> supply or 4 resitors for biasing the input and setting the
On Sunday, November 29, 2015 12:35:31 AM Poul-Henning Kamp wrote:
> I need to convert a 5MHz 0.2Vpp AC coupled sine signal to a 3.3V
> CMOS compatible logic signal.
>
> The "default" comparator based circuit either requires a negative
> supply or 4 resitors for biasing the input and setting the ze
The tl712cp works at 5 v and is self biased. Using one on the wwvb receiver
to convert a 10 Mhz sine wave to square. 5V to 3.3 is pretty easy to
convert.
Maybe they make a 3.3V version.
Paul
WB8TSL
On Sat, Nov 28, 2015 at 7:35 PM, Poul-Henning Kamp
wrote:
> I need to convert a 5MHz 0.2Vpp AC cou
I need to convert a 5MHz 0.2Vpp AC coupled sine signal to a 3.3V
CMOS compatible logic signal.
The "default" comparator based circuit either requires a negative
supply or 4 resitors for biasing the input and setting the zero level.
(The hysteresis resistor is the same in both cases).
Since space
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