Technical Reports


Design of a CMOS Clock with Synchronisation Cap ability

Castle, Rob
HP Laboratories


Keyword(s): Memory Spot, CMOS

Abstract: A Memory Spot is a very small integrated circuit containing non-volatile memory, a protocol processor to handle the communications and memory access, and a wireless interface. It has no battery or other external connections and receives its power from the device being used to communicate with it, via electromagnetic coupling. It is intended to be of a low enough cost to suit consumer applications. The combination of these features required a departure from the usual methods for providing a data synchronised clock, as they are either too large, take too long to achieve lock or require too much power. The design presented here comprises a compact oscillator circuit coupled with a digital control block to keep it synchronised, and it has been successfully fabricated and used in prototype Memory Spot chips.

7 Pages

External Posting Date: October 6, 2008 [Abstract Only]. Approved for External Publication - External Copyright Consideration
Internal Posting Date: October 6, 2008 [Fulltext]

Back to Index