Interpolation analog/digital converter

An interpolation analog-to-digital converter for converting an analog signal to a digital signal, said converter comprising:

• a plurality of input comparators for comparing said analog signal with reference signals, outputs of said input comparators being combined into groups;
• a plurality of interpolation means, each being connected to the corresponding group;
• encoding means connected to outputs of the interpolation means and input comparators for producing the digital signal;
• each input comparator including a first channel for receiving a reference signal, a second channel for receiving said analog signal and voltage shifting means connected between the channels;
• each channel including a first transistor and a second transistor;
• a base of the second transistor of each channel being connected to a junction point of transistors of the other channel through the voltage shifting means.

In an analog-to-digital converter having input comparator means for comparing an input analog signal with reference signals, interpolation means connected to a group of said comparator means for interpolating a combined output signal of the group in order to form a plurality of interpolated signals encoding means connected to outputs of the interpolation means and input comparators for producing the digital signal;

• the improvement comprising:
• each of said comparator means having a first circuit for receiving a reference signal, a second circuit for receiving said analog signal and voltage shifting means connected between said first and second circuits,
• each circuit including a first transistor and a second transistor,
• a base of the second transistor of each circuit being connected to a junction point of transistors of the other circuit through the voltage shifting means.