| 摘要 |
PROBLEM TO BE SOLVED: To provide an amplifier circuit and a light receiving circuit, with which offset caused by the amplitude of an input signal is reduced. SOLUTION: An amplifier circuit 1 is provided with a transistor (FET 1) 10, a transistor (FET 2) 12, load 14, load 16, a current source 18 and a low-pass filter (LPF) 6. The load 14 is provided between the drain of the FET 1 and a reference potential line 20, and the load 16 is provided between the drain of the FET 2 and the reference potential line 20. The current source 18 is provided between the coupling node of the sources of the FET 1 and the FET 2 and a reference potential line VSS. The LPF 6 is provided between the gate of the FET 1 and the gate of the FET 2. The gate of the FET 1 receives a signal from an input and extracts an output from any one of the drains of the FET 1 and the FET 2.
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