Patent ID: 7102674

Claim:
A charge transfer device having a source follower amplification circuit, wherein the source follower amplification circuit comprises: an amplification transistor which receives, at a gate, a voltage signal from an output section and outputs, from a source, an output signal corresponding to a change in the voltage signal; a load transistor connected between the amplification transistor and a first power source for causing a constant current to flow from the amplification transistor to the side of the first power source, so as to function as a constant current source; a control transistor connected between the amplification transistor and a second power source, wherein the control transistor controls a current flowing from the second power source to the amplification transistor according to a control signal, to thereby control the current flowing from the amplification transistor to the side of the first power source; and an output control circuit, connected to a gate of the control transistor, for outputting the control signal for reducing a current flowing from the second power source to the amplification transistor during a period in which a pixel signal, is not read.