| 摘要 |
PROBLEM TO BE SOLVED: To provide an analog/digital converter circuit having high noise immunity, and a recorder employing the circuit. SOLUTION: A 1st voltage conversion circuit amplifies an input signal level in a 1st region to be a prescribed voltage range, amplifies an input signal level of a 2nd region up to a maximum voltage. A 2nd voltage conversion circuit brings the input signal of the 1st region to zero voltage, amplifies the input signal level of the 2nd region to a prescribed voltage range, a 1st analog/digital converter circuit converts the voltage signal outputted from the 1st voltage conversion circuit into a digital signal, and a 2nd analog/digital converter converts a voltage signal outputted from the 2nd voltage conversion circuit into a digital signal. |
