at log kHz SolutionYou can have several problems 1 if you ar

Solution

You can have several problems:
1) if you are working with transistors sure you\'re not saturating.
2) if diodes are sure they are doing the right contact or try another.
3) Make sure your input source this good.
4) for me the most certain is that you are using an active elemnto and this is in court and why that image, check input sources, the currents that these manipulated are optimal for circuit elements you use or application you\'re doing.