I'm working on a project where I will be attempting to detect a change in current (of the order of pico-amps) at ~100 KHz between a capacitor (dielectric is simply a vacuum). I'm looking for any pointers anyone may have in circuit design for measuring such low signals at high frequencies. I have modelled the system and have a strong idea of the signals I'm looking for but have little background in amplifying circuits.
Thanks in advance,
Will
Thanks in advance,
Will