Title :
Low-noise photodiode-amplifier circuit
Author :
Hyyppä, Kalevi ; Ericson, Klas
Author_Institution :
Lulea Univ. of Technol., Sweden
fDate :
3/1/1994 12:00:00 AM
Abstract :
A photodiode-amplifier circuit with the photodiode in the feedback path is presented. It is named the PIF-circuit. No resistor is needed at the amplifier input to provide a path to ground for the signal and leakage currents from the photodiode and the amplifier input bias current. Therefore, one potentially dominating noise source is eliminated. At frequencies below 10 kHz, the implemented PIF-circuit has an NEP≈3 fW/√Hz
Keywords :
amplifiers; equivalent circuits; feedback; frequency response; network analysis; noise; photodetectors; photodiodes; transfer functions; 10 kHz; amplifier input bias current; feedback path; low-noise circuit; noise source; photodiode-amplifier circuit; Circuit noise; Feedback circuits; Frequency; Leakage current; Operational amplifiers; Photoconductivity; Photodiodes; Resistors; Transfer functions; Voltage;
Journal_Title :
Solid-State Circuits, IEEE Journal of
