DRS4 Forum
  DRS4 Discussion Forum  Not logged in ELOG logo
 Back  |  Find  |  Login  |  Help 
Entry  Wed Aug 1 17:42:32 2012, Mayank S. Rajguru, Calculation of loop filter parameters (R,C1and C1) for 1 GHz 
    Reply  Mon Aug 6 02:44:00 2012, Stefan Ritt, Calculation of loop filter parameters (R,C1and C1) for 1 GHz 
Message ID: 173     Entry time: Wed Aug 1 17:42:32 2012     Reply to this: 174
Author: Mayank S. Rajguru 
Subject: Calculation of loop filter parameters (R,C1and C1) for 1 GHz 

 Hi,

we are planning to use the DRS4 in our board for 1 GHz sampling and digitization.

I have seen in the data sheet that "For the PLL to work, an external loop filter is required. This filter ensures quick locking and stable operation at the desired sampling frequency".

What formula do you use to calculate the values of R, C1 and C2?

Can we use the same given value for different frequencies?

Thanks,

Mayak

ELOG V3.1.5-fe60aaf