Re: I think I got d down...I think
posted on
Jun 18, 2007 06:47AM
"The command input control source or an external crystal/clock
generator can be used IMO to be used as a reference for clocks farther
down the line on the chip, relating to delay (clock skew), but not as
the generator of the source."
I'm not sure whether this is still a big deal for you but the statement from the claim construction, IMO, says that a clock from a crystal cannot directly control the VCO (a ring oscillator is a type of VCO), and neither can a set of command signals. From the link that I posted, it can be seen that it is indeed the case. The clock from the crystal goes into a phase frequency detector. A clock from a crystal can be fed into a clock generator ie a design that divides down a clock but for a VCO the clock cannot be fed directly into it. Also the VCO simply uses either a voltage reference as its guide and not a control signal.
So your statement further down the chip is not correct unless i misunderstood what you said. The reference/control signal is used to guide the vco but not used directly.
hope that helps.
