AD converter, multi-channel AD converter, X-rays sensor modules and their control method

摘要

PPROBLEM TO BE SOLVED: To suppress the influence of a substrate noise and to enable a signal to be accurately and rapidly read. PSOLUTION: An analog-to-digital conversion apparatus includes a sample-and-hold circuit 6 for sampling an output signal level from a charge detector circuit 10, and an oversampling analog-to-digital converter 7 of an analog-to-digital converter circuit for sampling the output signal of the sample-and-hold circuit sampled by the circuit 6 for the analog-to-digital conversion within a predetermined period (T3) obtained by removing a stable reading period (T4) from a charge reading period for reading a signal charge from an external charge generator circuit 8 by the detector circuit 10 and analog-to-digital converting the output signal level. PCOPYRIGHT: (C)2004,JPO