Instead of trying to control nanosecond long crossover problems and skew in
driver chip propagation times, why not employ the Decca Tx approach of a
small value (damped) inductor between the top and bottom power devices to
'soak up' the high current short pulses.
It certainly works in my direct from mains Tx.
Andy G4JNT
-----Original Message-----
From: Rik Strobbe [mailto:[email protected]]
Sent: 2001-06-13 12:01
To: [email protected]
Subject: Re: LF: RE: 73kHz tests tonight
At 10:25 13/06/01 +0200, you wrote:
>Could TC4428 be keyed in G3YXM design? If so, it would
simplify the whole
>schematic.
>
>Petr, 'FIG
Petr,
That idea crossed my mind 2 years ago when building my TX
(variation on the
YXM design). But due to different delay times in the inverting and
non-inverting drivers (I measured abt. 25ns difference) I
didn't use the
4428 it.
If you don't wan't to use a flip-flop to get the
counter-phase signals you
can use a couple of CMOS XOR gates, with a CD4077 running on
15V I measured
less than 3ns difference between the inverting and non inverting gate.
73, Rik ON7YD
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