Patent ID: 7639290

Claim:
A data read circuit of a solid-state imaging device, comprising: a differential amplifier having a first input terminal to which a voltage of a noise signal of the solid-state imaging device is supplied and a second input terminal to which a voltage of a temporary data signal is supplied, and inverting an output signal in response to occurrence of an event that a magnitude relationship in voltage between the first and second input terminals becomes reverse, the temporary data signal being a signal having the noise signal superposed thereon; a switch which forms a connection between an output terminal of the differential amplifier and at least one of the first input terminal or the second input terminal, and operates in response to a supply of the voltage of the noise signal to the first input terminal and a supply of the voltage of the temporary data signal to the second input terminal; and a measurement circuit which measures an amount of variation in a voltage of one of the first and second input terminals from when the voltage of one of the input terminals begins to vary in a direction to reverse the magnitude relationship in voltage to when the output signal is inverted, and which outputs a result of the measurement as a digital value indicating a voltage of a real data signal obtained by removing the noise signal from the temporary data signal.