Hello,
I'm Aktham.
I'm designing a high speed half wave rectifier using the OPA699 with a voltage gain of 6V/V.
My design is almost the same as in figure 8 of the data sheet (see attached Tina TI simulation file). The input signal is of 0.25 V or 0.5 V.
However, in my design, several surprising results do not seem to meet the specifications of the datasheet:
- There is a large distortion of the rectifier output at the rising slop. This distortion starts at almost 1 MHz and it is becomes worst until several 10 MHz.
-This distortion is less important at higher frequencies (100 MHz), but the gain of 6 is not retained as in figure 9 of the datasheet.
Simulation results are almost identical to measurement results.
I'll be very thankfull if you could help.
have a nice day.
Aktham