New Varactor Bridge Op Amps

Models 302, 303—Cost $110 Each; Feature 0.01 pA Current Noise and 0.05 pA/°C Current Drift

If you measure picoamps, work with multi-megohm sources, handle transducer output swings from picoamps to miliamps without range switching or need better integrator and differentiator accuracy or day-long time constants, Models 302 or 303 will probably solve your problem.These two varactor bridge units out perform electrometer tubes and FET's, and can upgrade circuit accuracy and sensitivity at reduced cost. Read full article