Patent ID: 8101900
Filing Date: 2012-01-24
Classification: G01J,H03F,H03K

Abstract:
1. A circuit for outputting an output current based on a photo current of a photo diode, the circuit comprising: a terminal connectable to the photodiode; a resistance device configured to generate a voltage drop based on the photocurrent of the photodiode; a control loop connectable to the resistance device and configured to generate the output current based on the photocurrent; and a switching means connectable to the terminal having a first switch position for a first operating mode for operating the photodiode in reversed bias and having a second switch position for a second operating mode for operating the photodiode in a photovoltaic mode, wherein, in the first operating mode in the first switch position of the switch, the resistance device and the control loop are by-passed and/or are not connected, and wherein, in the second operating mode in the second switch position of the switch, the terminal is connected to the resistance device.