[time-nuts] minimalist sine to square

jimlux jimlux at earthlink.net
Fri Jan 19 15:06:54 EST 2018

On 1/19/18 11:31 AM, Tom Van Baak wrote:
> John's TADD-2-mini [1] uses the Wenzel sine-to-square converter. It performs very well but requires +10 V.
> I'm looking for a solution that works at 5 V (e.g., USB powered) and also uses fewer parts. Wenzel also mentions using a differential line receiver [2]. That would be an ideal single-chip 5 V solution for me but the two parts he mentions, MC1489 [3] and SN55182 [4], don't appear fast enough for a 10 MHz input.

There are tons of LVDS that run on 3.3 or 5V, Maxim, TI both have parts.

The first Maxim part google turned up with "LVDS receiver" was a quad, 
esd protected unit good to 400 MHz, 2ns prop delay, 50mV hysteresis.

You do want to watch the common mode voltages - some of the parts are 
not good about having the signals swing near the rails (or beyond).

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