Low speed Clock and Data Recovery

[timedate]

Hi, all

I am designing a optical receiver with 2 Mbps.

However, I could not find an Clock and data recovery (CDR) in that speed, and also CDR consumes a lot of power.

Therefore, I am trying to find a clocked comparator to perform the function of the CDR, since the continues comparator will change the duty cycle of my output.

So, the question is
1 Is there some low power and low speed CDR in the market?
2 Should a clocked comparator work? (a comparator with latch?) where can I find it ?

I put my design in the attached, you can find that the continues comparator changes the duty cycle of the signal.

Thanks all

 

[KlausST]

Hi,

maybe it is possible to transmit UART styte. Then no clock recovery is needed, but known and fix baudrate.
Or transmit like IRDA ...

Klaus

 

[FvM]

Is it expecting too much if we ask for a readable document describing your problem?

 

[biff44]

have not played with this stuff for a while, but i remember doubling the data in frequency, and the clock was easily found then.