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ZeroCrossing Detector - 1.5G (Read 2526 times)

despap

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Posts: 18

ZeroCrossing Detector - 1.5G
Mar 09^th, 2012, 8:02pm

Hi all,

Problem Statement:
VCC = 1.8 - 2.0V
Process details: VT ~ 500mV nominal
Ft > 6GHz
Ibias varies +/-10% over and above Poly-Resistor variation.

I have a two single-ended fully differential signals,each 50mVPP, on common mode of VCC,max frequency of 1.5GHz.
This needs to be converted to CMOS levels. ( 0-VCC swing) with minimal affect on Duty cycle at the output.

Any suggestions please..

Thanks,
desPap

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loose-electron

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Posts: 1638
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Re: ZeroCrossing Detector - 1.5G
Reply #1 - Mar 10^th, 2012, 12:42pm

clarify the question

"two single ended fully differential signals"

does not make sense.

is that 4 wires and 2 signals?
is that 2 wires and one signal?

what is the max-F and min-F of the signal?
You give only one.

I think you need an AC coupled, auto zeroed comparator,
but need to understand what you are looking for first.

Jerry Twomey
www.effectiveelectrons.com
Read My Electronic Design Column Here
Contract IC-PCB-System Design - Analog, Mixed Signal, RF & Medical

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despap Junior Member Offline Posts: 18	Re: ZeroCrossing Detector - 1.5G Reply #2 - Mar 20^th, 2012, 2:57am Two signals: Both referred to Ground V1 = 25msin(wt) V2 = 25msin(wt+180) Frequency - 1G to 1.5G
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loose-electron Senior Fellow Offline Best Design Tool = Capable Designers Posts: 1638 San Diego California	Re: ZeroCrossing Detector - 1.5G Reply #3 - Mar 20^th, 2012, 7:24am Research: Differential Current Steering Logic At those frequencies this is probably where you want to go.
Back to top	Jerry Twomey www.effectiveelectrons.com Read My Electronic Design Column Here Contract IC-PCB-System Design - Analog, Mixed Signal, RF & Medical IP Logged

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