EMRFD Message Archive 9768

Message Date From Subject
9768 2014-02-17 18:24:35 Jim Miller Squarer for Class E

I've been working some more on my Class E design for 630M and am now at the point where I need to convert the sine wave to CMOS levels while preserving symmetry. The symmetry is more important for Class E. This can be brute forced with a comparator of course but wonder if anyone has some links to some simpler approaches.

I've ordered parts to breadboard the design up to this point and one I get something showing on the scope I'll have a better idea of the challenge.

Ideas welcome!

jim ab3cv

9769 2014-02-18 02:45:17 jorschei Re: Squarer for Class E

Jim,
See the blogspot of K6JCA

http://k6jca.blogspot.nl/search/label/Class%20E%2FF%20Exciter

73'Joris PE1KTH

9770 2014-02-18 04:01:18 i7swx Re: Squarer for Class E

Hi Jim,
you may try a LVDS squarer. I will add it in Files as LVDS squarer. There was a +5V dual LVDS RX DS90C402 but I do not know if it is still available. All LVDS now are for 3V supply (3.0-3.6V). The LVDS squarer in my circuit diagram, which I use in the 3T and 2T H-Mode Mixer, uses a FIN1002 at 3.6V (absolute max voltage +4.6V). There are no adjustments, Out Rise Time 0.6nS and Out Fall Time 0.5nS typical, skew max 0.4nS.

Best 73
Gian
I7SWX

9768	2014-02-17 18:24:35	Jim Miller	Squarer for Class E
Message	Date	From	Subject
I've been working some more on my Class E design for 630M and am now at the point where I need to convert the sine wave to CMOS levels while preserving symmetry. The symmetry is more important for Class E. This can be brute forced with a comparator of course but wonder if anyone has some links to some simpler approaches. I've ordered parts to breadboard the design up to this point and one I get something showing on the scope I'll have a better idea of the challenge. Ideas welcome! jim ab3cv
9769	2014-02-18 02:45:17	jorschei	Re: Squarer for Class E
Jim, See the blogspot of K6JCA http://k6jca.blogspot.nl/search/label/Class%20E%2FF%20Exciter 73'Joris PE1KTH
9770	2014-02-18 04:01:18	i7swx	Re: Squarer for Class E
Hi Jim, you may try a LVDS squarer. I will add it in Files as LVDS squarer. There was a +5V dual LVDS RX DS90C402 but I do not know if it is still available. All LVDS now are for 3V supply (3.0-3.6V). The LVDS squarer in my circuit diagram, which I use in the 3T and 2T H-Mode Mixer, uses a FIN1002 at 3.6V (absolute max voltage +4.6V). There are no adjustments, Out Rise Time 0.6nS and Out Fall Time 0.5nS typical, skew max 0.4nS. Best 73 Gian I7SWX