[time-nuts] Need tiny 5MHz 10x amplifier

Charles Steinmetz csteinmetz at yandex.com
Sun Nov 29 08:05:41 EST 2015

I wrote:

>The LT1720** works on a 3.3v single supply, and has internal 
>hysteresis.  Just ground one input, ground the other through a 
>resistor, and attach your AC-coupled signal (best if you can use 
>equal resistors to ground on the two inputs, but if the signal 
>termination is 50 ohms the other input can be 0 ohms to ground; even 
>1k ohm would probably be OK).
>Note that the LT1720 is specified for inputs to 100mV below V- 
>(ground, in this case) and your 200mVpp signal pushes it right to 
>the limit.  A bit of attenuation is probably a good idea.
>**  The 1720 is a dual comparator, so you'd have an extra to use or 
>ignore.  Alternatively, the 1719 is a single with extra features 
>that you could ignore.  Either should work well in your application.

See attached schematic.

Best regards,


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