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PMC tips software-programmable clock synthesizer

Posted: 04 Aug 2010 ?? ?Print Version ?Bookmark and Share

Keywords:programmable clock synthesizer? PMC? module?


Pentek Inc. expands its multi-frequency clock synthesizer offerings with a user-configurable programmable clock synthesizer PCI mezzanine card (PMC) module. The Model 7191 gives designers working with A/Ds and D/As a precise clock source and the flexibility of custom frequency generation under simple software control.

The Model 7191 uses low-noise VCXOs for the fundamental frequency generation. The VCXO output is followed by a clock synchronizer from Texas Instruments Inc. to allow synchronization with common frequency reference sources.

The PMC generates four different user-programmable VCXO frequencies, plus four divided versions (by 2, 4, 8 and 16) of each oscillator. Using provided software, users can freely route up to five different frequencies from this set of 20 choices to the board's eight buffered 50- outputs.

The user-programmability of the Model 7191 provides arbitrary frequencies to help speed development by providing immediate access to non-standard operating frequencies. Conventional crystal oscillators for custom frequencies often require extremely long lead times.

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