| 摘要 |
An analog-to-digital converter for converting an analog input signal to a digital output signal with m upper bits and n lower bits includes 2m+n-1 resistors establishing 2m+n reference voltages for comparison with an amplitude of the analog input signal, 2m-1 voltage comparing circuits for comparing the analog input signal with 2n step-by-step reference voltages, a first encoder for encoding the output signals of the 2m-1 voltage comparing circuits for generating m upper bits of the digital output signal, a matrix circuit having 2m(2n-1) voltage comparators for comparing the analog input signal with the remaining reference voltages of the 2m+n references voltages, the other voltage comparing circuits being supplied output signals of the matrix circuit and a second encoder for encoding output signals of the other voltage comparing circuits for generating n lower bits of the digital output signal. |
