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Take a look at Analog Devices' line of DDS chips. Pretty much a one-chip
(needs ucontroller to drive it) digital solution to turn your 10MHz clock into virtually any frequency below 5 MHz (in theory; below 4MHz in easy practicality). The AD9834 only consumes 20mw at 3.3 VDC. There are many other devices in the product line. Many have built-in comparators to produce square-wave output. Joe W3JDR "Mike W" wrote in message ... I have a need to produce an accurate 4Mhz 50% dutycycle TTL squarewave to use as a timebase. I have a 10Mhz IQD frequency standard of suitable accuracy. How can I divide this to produce the 50% duty cycle 4Mhz signal?. Is it even possible with logic alone?. I can see how to mix with either 6Mhz or 14Mhz, but this then detracts from the required accuracy. atb Mikw |
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