My application is a typical electro optical design where analog electric pulse from a photo diode is digitalised, Pulse Width=10ns, pulse repetetion rate= 20uS
my anlog pulse to digital conversion is like below, with a gain of 1K through TIA and pulse inversion using limiting amplifier and digital conversion through high speed comparator
as i am working with a pulse of rise time 2ns, my BW of operation would be <200MHz
when i have read the previous question and answers i have seen people suggested to go for a 0.1uF,0.01uF ceramic capacitor near to the power supply pins
i am clue less which capacitor to choose exactly for high frequency circuits which are working around 200MHz
to confuse me more i have seen a app note saying this idea of choosing 0.1uF is age old for high frequency circuits
when they say high frequencies do they mean really > 1Ghz ?
do i really have to worry ? or for my 200MHz i can choose the 0.1uF and 0.01uF in parallel proceed ?