justneedone
Newbie level 1
Trying make a high frequency peak detector, i have a couple of question.
hello all,
i am trying to make a peak detector using npn bjts as diodes and lm318 opamp. my input is a sinewave. so far my circuit works for frequency between 10k to 100k but as i start getting to higher frequency there is an voltage overshoot on the cap. i dont understand why there is an voltage overshoot, can somebody provide me with a solution. Note: my circuit has to go to 500KHz and the cap has must be discharging between the negative input wave.
this is at 2.5 V and 100k
this is at 2.5V and 200k
hello all,
i am trying to make a peak detector using npn bjts as diodes and lm318 opamp. my input is a sinewave. so far my circuit works for frequency between 10k to 100k but as i start getting to higher frequency there is an voltage overshoot on the cap. i dont understand why there is an voltage overshoot, can somebody provide me with a solution. Note: my circuit has to go to 500KHz and the cap has must be discharging between the negative input wave.
this is at 2.5 V and 100k
this is at 2.5V and 200k