The AD9850 sine wave generators are just that - sine wave generators. They quote a square wave up to 5MHz which is not good enough. On 12 October 2015 at 03:33, Bob Blick wrote: > Hi David, > > Have you looked the plethora of AD9850 DDS sinewave generators? They > have a comparator for squarewave output. I don't know what your spec is, > but you could put a toggling flip-flop on the comparator output if you > need better duty cycle accuracy than the comparator itself (if you can > lose the upper octave). > > Best regards, Bob > > On Sun, Oct 11, 2015, at 11:04 AM, David C Brown wrote: > > I am looking for a module to generate logic level square wave up to at > > least 20MHz (50 would be better) within a $100 budget. There are a > > number > > of items on eBay but none have them seem to have a proper spec. Any > > recommendations from experience? > > > > -- > > __________________________________________ > > David C Brown > > 43 Bings Road > > Whaley Bridge > > High Peak Phone: 01663 733236 > > Derbyshire eMail: dcb.home@gmail.com > > SK23 7ND web: www.bings-knowle.co.uk/dcb > > > > -- > http://www.fastmail.com - Does exactly what it says on the tin > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 __________________________________________ David C Brown 43 Bings Road Whaley Bridge High Peak Phone: 01663 733236 Derbyshire eMail: dcb.home@gmail.com SK23 7ND web: www.bings-knowle.co.uk/dcb --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .