Analog-to-digital conversion system

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

1986-09-02

1988-05-31

Shoop, Jr., William M.

Communications: electrical

Audible indication

Percussion-type sound producer

H03M 100

Patent

active

047484403

ABSTRACT:
In an analog-to-digital conversion system, the system includes: a voltage conversion circuit 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 subtracts a reference voltage from the first conversion voltage, and a third conversion voltage which adds the reference voltage to the first conversion voltage; a comparison circuit using at least two decision level voltages and comparing the input voltage with each of the decision level voltages, then outputting the command signal as a result of a comparisons 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 the comparisons by the comparison circuit.

REFERENCES:
patent: 3308284 (1967-03-01), Grubb
patent: 3842413 (1974-10-01), Lagarde

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