Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1978-05-19
1981-04-14
Sloyan, Thomas J.
Communications: electrical
Audible indication
Percussion-type sound producer
340347M, 354 23D, H03K 13175
Patent
active
042622824
ABSTRACT:
An indicator arrangement includes comparators for parallel comparison of an analog input voltage with digitalizing standard voltages to digitalize the input voltage and an indicator for indicating digitalized output. The arrangement is provided with a controller periodically switched between a first control state and a second control state. The controller in the first control state allows the comparators to perform comparison in a first voltage range of the analog input voltage while in the second control state it allows the comparators to perform comparison in a second voltage range of the analog input voltage.
There is provided an encoder for coding the digitalized output of the comparators with a first coding mode in the first control state of the controller and coding the digitalized output of the comparators with a second coding mode in the second control state. The encoder is adapted to drive the indicator with a first or second mode according to the state of the controller.
REFERENCES:
patent: 3935569 (1976-01-01), Marcel et al.
patent: 3949170 (1976-04-01), Shionoya
patent: 3990799 (1976-11-01), Nanba et al.
Stephenson, Analog-Digital Conversion Handbook, 1964, Digital Equipment Corp., 1964, pp. 20-22.
Nippon Kogaku K.K.
Sloyan Thomas J.
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