Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1982-09-17
1985-09-17
Miller, Charles D.
Communications: electrical
Audible indication
Percussion-type sound producer
307361, H03K 13175
Patent
active
045423709
ABSTRACT:
In an A/D converter in which a first comparator A/D converter for providing the most significant bits of a digital output and a second comparator A/D converter for providing the least significant bits of the digital output are cascaded, a switching circuit is provided between the first A/D converter and the second A/D converter. This switching circuit is responsive to the comparison between an analog input voltage and first comparison reference voltages in the first A/D converter to apply two adjacent first reference voltages between which the analog input voltages lies to both ends of a voltage dividing circuit network of the second A/D converter to thereby provide second comparison reference voltages. In the second A/D converter, the second comparison reference voltages are compared with the analog input voltage by comparators, to provide the least significant bits of a digital output.
REFERENCES:
patent: 3298014 (1967-01-01), Stephenson
patent: 3585631 (1971-06-01), McCown
patent: 3597761 (1971-08-01), Fraschilla et al.
patent: 4008468 (1977-02-01), Imhoff
Shimizu Shoichi
Yamada Hisashi
Miller Charles D.
Tokyo Shibaura Denki Kabushiki Kaisha
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