Voltage comparison apparatus

A voltage comparison apparatus comprising:

• an input unit which has first and second switch means being complementarily ON/OFF controlled, whose one ends are connected together with each other, and whose other ends are supplied with a first voltage and a second voltage to be compared respectively, and
• an amplifier unit having a plurality of amplifier circuits each of whose input terminal is each one end of a coupling capacitor and each of whose other end is connected to each one end of parallel circuits of an inverting amplifier and a feed back route switch means, and each of whose output terminal is each other end of said parallel circuits, in which an input terminal of the first amplifier circuit of said plurality of amplifier circuits is connected to said one end of said input unit, each input terminal of the other amplifier circuits is connected in cascade to output terminals of the amplifier circuits which are located more adjacent said input unit, and the feedback route switch means of at least one of the amplifier circuits is adapted to be ON/OFF controlled in complementary relation to the feedback route switch means of the other amplifier circuits,
• whereby the feedback route switch means of said at least one amplifier circuit is so controlled that the timing for said switch means is turned on (or off) in advance of the timing of turning off (or on) of the feedback route switch means of the amplifier circuit located more adjacent said input unit.