Solutions Search - LT1462 - Dual/Quad Micropower, 260µW C-Load Picoampere Bias Current JFET Input Op Amps

Logging Photodiode JFET Amplifier with 1pA Input Bias Current

Jul 1st 1996
The 1pA input bias current contributes only 0.4fA/rtHz of current noise or 0.4nV/rtHz voltage noise with a 1Mohm source impedance. Photodiode current is converted to a voltage by the first op amp and D1 and amplified by the first, second and third logarithmic compression amplifiers. ...