!00 Mhz sine to (TTL or lock signal) translator Device?

[LOC]

Hi all,
I am looking for a device to translate 100Mhz sineusoidal waveform, -
2 dBm, load 50 ohm (it meams 0.5V peak to peak, DC offset 0 Volt) to
TTL level. The supply is -/+5 Volt. I know using a comparator can do
the work, but it is not fast device for 100Mhz to TTL. Please help,
what device or any way recommended will be appreciated.
Loc

 

[Hal Murray]

I am looking for a device to translate 100Mhz sineusoidal waveform, -
2 dBm, load 50 ohm (it meams 0.5V peak to peak, DC offset 0 Volt) to
TTL level. The supply is -/+5 Volt. I know using a comparator can do
the work, but it is not fast device for 100Mhz to TTL. Please help,
what device or any way recommended will be appreciated.

Do you want a one-shot solution, or a cheap but rock solid
design for a huge production run?

100 MHz isn't all that fast for modern logic.

My first try would be a high speed CMOS inverter. TI has
several families. So do many other vendors.

Couple your signal in through a cap and bias the input
through a 1 meg (or 100K) resistor from the output. I
don't know if 1/2 V p-p is enough. Going through another
gate might help to clean it up.

You could also try using a ECL/PECL to TTL converter chip.
1/2 V would be plenty of swing for that.

They do make fast comparators. Most of them have ECL outputs.
It's probably worth a scan through various manufacturers
web sites. TI, National, Linear Technology, Maxim, ...

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[LOC]

Winfield Hill <Winfield_member@newsguy.com> wrote in message news:<cl96o002npq@drn.newsguy.com>...

LOC wrote...

I am looking for a device to translate 100Mhz sineusoidal waveform, -
2 dBm, load 50 ohm (it meams 0.5V peak to peak, DC offset 0 Volt) to
TTL level. The supply is -/+5 Volt. I know using a comparator can
do the work, but it is not fast device for 100Mhz to TTL.

What are you going to drive with the resulting "TTL" signal?
Output signal will drive CPLD (requires minimum High i/p Voltage = 2V,

Max Low i/p V =0.8 V) 3.3 V supply

 

[LOC]

hmurray@suespammers.org (Hal Murray) wrote in message news:<JaadnaN_C4GX8OXcRVn-sg@megapath.net>...

I am looking for a device to translate 100Mhz sineusoidal waveform, -
2 dBm, load 50 ohm (it meams 0.5V peak to peak, DC offset 0 Volt) to
TTL level. The supply is -/+5 Volt. I know using a comparator can do
the work, but it is not fast device for 100Mhz to TTL. Please help,
what device or any way recommended will be appreciated.

Do you want a one-shot solution, or a cheap but rock solid
design for a huge production run?

100 MHz isn't all that fast for modern logic.
You are right. they are fast today. I looked at my old data book, ECL

to TTL delay 9.6ns from High to Low. Now is max 6.2 ns delay for High
to Low or (Low to High). min 1.6 ns delay for Low to High. It is o.k

My first try would be a high speed CMOS inverter. TI has
several families. So do many other vendors.


Couple your signal in through a cap and bias the input
through a 1 meg (or 100K) resistor from the output. I
don't know if 1/2 V p-p is enough. Going through another
gate might help to clean it up.

You could also try using a ECL/PECL to TTL converter chip.
1/2 V would be plenty of swing for that.
1/2V is not good for Input Level requirement of ECL side

Anyway, thanks for advice.

They do make fast comparators. Most of them have ECL outputs.
It's probably worth a scan through various manufacturers
web sites. TI, National, Linear Technology, Maxim, ...