A pipeline type A/D converter is capable of expanding an input range and increasing the number of bits of digital output signals, without increasing thermal noises or an open loop gain needed for an operational amplifier. The number of sample-hold capacitors is divided from M into N and the reference voltage is multiplied by N to increase the number of capacitors available to add to and subtract from the reference voltage. The input range is expanded and the number of bits of the digital output signals is increased. Because the analog signal is sampled by all the capacitors, thermal noise does not deteriorate. The open loop gain needed for the operational amplifier does not increase, since the ratio of the capacitors each used as a feedback element for amplifying the analog signal to the remaining capacitors is unchanged before and after the division of the capacitors.