Communications: electrical – Continuously variable indicating – Using a particular modulation
Patent
1991-09-30
1995-07-18
Peng, John K.
Communications: electrical
Continuously variable indicating
Using a particular modulation
341123, 327100, H04Q 900
Patent
active
054345642
ABSTRACT:
Pulses are produced in accordance with physical quantity changes in order to express the amount of change by count of the pulses produced. The changes are input to a convertor which converts them to corresponding electrical output values which are made available to a sample and hold circuit and to a first input of a comparator. An output value accepted from the convertor is held, as a held value, in the sample and hold circuit and provided therefrom to a second input of the comparator. The comparator produces an output pulse, so as ultimately to provide a trigger pulse and to be counted, only when the first input of the comparator differs from the second input thereof by a preset reference amount. At each trigger pulse, the sample and hold circuit accepts the next available electrical output value from the convertor as the value to be hold and provided to the comparator. In a preferred embodiment involving the movement of an instrument over a long distance to reach an objective point, it is possible to freely change the reference amount and, thus, the pulse density, or resolution, during use of the instrument. In so doing, movement over most of the distance is effected with the pulse density set at a high value to improve speed of movement and, as the objective point is nearly attained, the pulse density is reduced and the instrument finally locates the objective point with a low pulse density to improve the smoothness of movement.
REFERENCES:
patent: 3753133 (1973-08-01), Shumate, Jr.
patent: 4007357 (1977-02-01), Yanagishima
patent: 4158195 (1979-06-01), Abe
patent: 4194180 (1980-03-01), Noren et al.
patent: 4297680 (1981-10-01), Koeman
patent: 4363976 (1982-12-01), Minor
patent: 4370643 (1983-01-01), Kitamura
patent: 4390844 (1983-06-01), Ting
patent: 4393371 (1983-07-01), Morgan-Smith
patent: 4897647 (1990-01-01), Sakamoto et al.
Owen, "PCM and Digital Transmission Systems", 1982, McGraw Hill, USA, pp. 87-89.
Hill Andrew
Koga Electronics Co., Ltd.
Peng John K.
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