[sdiy] can someone explain latches?

[Dan Snazelle]

thanks guys
but i think  i worded my question wrong. 
i am trying to find out better when to use a latch. and how to set it up.
i know in theory that a latch is something to store a value but i do not understand how to implement it
or recognize it in a circuit.

maybe this is too general a question





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----------------------------------------
> Date: Wed, 6 May 2009 15:21:38 -0700
> From: dixon at interchange.ubc.ca
> Subject: RE: [sdiy] can someone explain latches?
> To: subjectivity at hotmail.com; synth-diy at dropmix.xs4all.nl
>
> 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.
>
>