Title:
光電変換回路
Document Type and Number:
Japanese Patent JP5186546
Kind Code:
B2
Abstract:
There are provided a photodiode 11, an inverting amplifier 12 which includes an operational amplifier 12a and a first resistor 12b, a second resistor 21 which has a smaller resistance value than the first resistor 12b and which is inserted between the positive side of a power supply and the photodiode 11, a differential amplifier 22 which outputs a voltage across both ends of the second resistor 21, and a diode 23 which is connected between a ground and a connection point between the photodiode 11 and an inverting input terminal of the operational amplifier 12a and which changes to a non-conductive state when the inverting amplifier 12 is not saturated and changes to a conductive state when the inverting amplifier 12 is saturated so that the output current of the photodiode 11 is bypassed.
Inventors:
Tatsuyuki Maki
Application Number:
JP2010253934A
Publication Date:
April 17, 2013
Filing Date:
November 12, 2010
Export Citation:
Assignee:
Anritsu Co., Ltd.
International Classes:
H03F3/08
Domestic Patent References:
| JP792075A | ||||
| JP62115902A | ||||
| JP2009105840A |
Attorney, Agent or Firm:
Seishi Hayakawa
Previous Patent: JPS5186545
Next Patent: POLYHYDROXYAROMATIC COMPOUND, EPOXY RESIN CONTAINING SAME, AND EPOXY RESIN COMPOSITION
Next Patent: POLYHYDROXYAROMATIC COMPOUND, EPOXY RESIN CONTAINING SAME, AND EPOXY RESIN COMPOSITION