AD converter

摘要

A high speed, accurate AD converter operable at low supply voltage, even with low gain amplifiers, particularly for a serial-parallel or pipelined AD converter, has a sub AD converter in each block of the second and subsequent stages provided with an adjuster for adjusting the full scale reference voltage in accordance with the gain of the error amplifier of the preceding stage. Analog switches are rendered immune to low operating voltage by being supplied separate voltage higher than the supply voltage of the other components in their circuit.