Analog-to-digital conversion system

Details Analog-to-digital conversion system Analog-to-digital conversion system

H - Electricity

03

M

354/82

H03M 1/40 (2006.01)

Patent

CA 1338910

In an analog-to-digital conversion system, the system includes: a voltage conversion circuit having a plurality of switch contacts selectively obtaining at least three kinds of conversion voltages, i.e., a first conversion voltage which is double the input voltage, a second conversion voltage which is equal to a first conversion voltage minus a reference voltage and a third conversion voltage which is equal to the sum of the first conversion voltage and the reference voltage; a comparison circuit setting at least two decision level voltages and comparing the input voltage with each of the decision level voltages, then outputting a command signal as a result of a comparison to the voltage conversion circuit so that the voltage conversion circuit outputs one of the conversion voltages in response to the command signal; and a control circuit for changing the connections of switch contacts provided in the voltage conversion circuit in response to the result of a comparison by the comparison circuit to enable output of the appropriate conversion voltage.

516940

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