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High resoulustion comparator with dc blocking

Question asked by Eleci on Mar 10, 2013
Latest reply on Apr 4, 2013 by AnnaFeB

Dear all,


I have a signal with a DC voltage  around 2V ( as it's used in receiver side, the DC is determined by power detector output and is varying between 0.2 to 2 V) the freequency is 200kHz-10MHz and the AC voltage is 13-15mV . I want to retrieve the pulse using an ADC. I want to know which ADC (or comparator) can be used? The attachment you can find one example of my signal at the  output of RF front-end. In this example, the  signal at the input  RF front-end is a 200KHz pulse  with 50% duty cycle. The desired output would be  with VH=1.2V and VL=0 V. I tried to use AD8611 with dc bloc cap (1uF)  but It didn't work...


Thanks in advance,