[sdiy] can someone explain latches?

Dan Snazelle subjectivity at hotmail.com
Thu May 7 01:27:17 CEST 2009

ok thanks 

i am going to buy that book and also get out the cmos cookbook

i want to be ready when these da/ad chips get here

check out various dan music at:


(updated monthly)



(or for techno) http://www.myspace.com/snazelle

ALSO check out Dan synth/Fx projects:





and soundtrack/design work:

NEW: check out Dan's sound design from the 1998 award winning film SAFARI by catherine chalmers


> Date: Wed, 6 May 2009 19:25:55 -0400
> From: harrybissell at wowway.com
> To: dixon at interchange.ubc.ca
> CC: subjectivity at hotmail.com; synth-diy at dropmix.xs4all.nl
> Subject: RE: [sdiy] can someone explain latches?
> A "type D register" is like a digital S/H
> The "transparent latch" is like a digital T/H (track / hold)
> H^) harry
> ----- Original Message -----
> From: David G. Dixon 
> To: 'Dan Snazelle' , synth-diy at dropmix.xs4all.nl
> Sent: Wed, 6 May 2009 18:21:38 -0400 (EDT)
> Subject: RE: [sdiy] can someone explain latches?
> Dan,
> A "latch" is really just a transparent flip-flop. Quoting Horowitz and
> Hill:
> The term "latch" is usually reserved for a special kind of register: one in
> which the outputs follow the inputs when enabled and hold the last value
> when disabled. Since the label "latch" has become ambiguous with use, the
> terms "transparent latch" and "type D register" are often used to
> distinguish these closely related devices."
> Hence, a latch will follow the data input whenever it is enabled. A
> register follows the data input only on the transition of a clock pulse.
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