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Re: [time-nuts] sine to square wave circuits - performance data?

EP
Ed Palmer
Wed, Oct 4, 2017 3:19 AM

The "LPRO User's Guide & Integration Guidelines" includes phase noise
data for 4 different sine to square converters in Section 3.4.

http://www.ko4bb.com/manuals/207.47.238.85/Datum_LPRO_Users_guide1.pdf

I used a similar circuit, but to improve performance at 2.5 MHz and 5
MHz, I used 1000 pf for the input capacitor.  As expected, performance
improves with higher frequencies and input levels.

Ed

On 2017-10-03 7:17 PM, Attila Kinali attila@kinali.ch wrote:

Moin,

The last couple of days, I have been looking into sine to square
wave converters. There are a few proposed circuits[1-4] and there
is of course Collins' paper [5]. But I am unable to find actual
performance data of the different circuits. Does someone have
such data and would share it with me/us?

		Attila Kinali
The "LPRO User's Guide & Integration Guidelines" includes phase noise data for 4 different sine to square converters in Section 3.4. http://www.ko4bb.com/manuals/207.47.238.85/Datum_LPRO_Users_guide1.pdf I used a similar circuit, but to improve performance at 2.5 MHz and 5 MHz, I used 1000 pf for the input capacitor. As expected, performance improves with higher frequencies and input levels. Ed On 2017-10-03 7:17 PM, Attila Kinali <attila@kinali.ch> wrote: > Moin, > > The last couple of days, I have been looking into sine to square > wave converters. There are a few proposed circuits[1-4] and there > is of course Collins' paper [5]. But I am unable to find actual > performance data of the different circuits. Does someone have > such data and would share it with me/us? > > Attila Kinali
AK
Attila Kinali
Wed, Oct 4, 2017 7:44 AM

Moin,

Thanks everyone for the data!

On Tue, 3 Oct 2017 21:19:47 -0600
Ed Palmer ed_palmer@sasktel.net wrote:

The "LPRO User's Guide & Integration Guidelines" includes phase noise
data for 4 different sine to square converters in Section 3.4.

http://www.ko4bb.com/manuals/207.47.238.85/Datum_LPRO_Users_guide1.pdf

I find it interesting that a simple 74AC04 performs so well (given enough
input power) compared to even an LT1016.

			Attila Kinali

--
You know, the very powerful and the very stupid have one thing in common.
They don't alters their views to fit the facts, they alter the facts to
fit the views, which can be uncomfortable if you happen to be one of the
facts that needs altering.  -- The Doctor

Moin, Thanks everyone for the data! On Tue, 3 Oct 2017 21:19:47 -0600 Ed Palmer <ed_palmer@sasktel.net> wrote: > The "LPRO User's Guide & Integration Guidelines" includes phase noise > data for 4 different sine to square converters in Section 3.4. > > http://www.ko4bb.com/manuals/207.47.238.85/Datum_LPRO_Users_guide1.pdf I find it interesting that a simple 74AC04 performs so well (given enough input power) compared to even an LT1016. Attila Kinali -- You know, the very powerful and the very stupid have one thing in common. They don't alters their views to fit the facts, they alter the facts to fit the views, which can be uncomfortable if you happen to be one of the facts that needs altering. -- The Doctor