Re: VHF low level to TTL converter

On Mon, 05 Dec 2005 10:20:47 +0800, budgie <me@xxxxxxxxxxx> wrote:

>On Sun, 04 Dec 2005 21:05:15 +0800, Richard Hosking <richardh@xxxxxxxxxxxx>
>wrote:
>
>>Dear all
>>I want to convert 0.8V P-P (50 ohms), centred on 0.4V DC to TTL logic
>>levels, from about 1 to 120 MHz.(input to a 74ACT163 binary counter)
>>Whats the best/cheapest way of doing this, preferably with a single +5V
>>supply and low current? Linearity is not critical
>>I thought of using a video amp, but it would need dual supplies.
>
>Synthesiser or frequency counter?
>
>Do you need full count output or can you survive on a submultiple of the VHF
>input e.g. /4 or /10?
>
>For counter preamp with speed, in the "good old days" we used the MC10216 triple
>line receiver as a limiting amp. Nowadays the 10116 seems still available, but
>as you'd appreciate that generation of ECL was thirsty.

Just AC couple into "AZ100ELT21" found at http://www.azmicrotek.com

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

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