G - Physics – 06 – G
Patent
G - Physics
06
G
328/22
G06G 7/28 (2006.01) G01D 5/22 (2006.01) G06F 1/03 (2006.01) G06J 1/00 (2006.01)
Patent
CA 1214830
ABSTRACT OF THE DISCLOSURE A sine wave generator which utilizes a PROM for storing a predetermined bit pattern which is converted to a corresponding pulse waveform generated in response to a very accurate and stable clock pulse. The pulse waveform is shifted to a very exacting voltage level and is fil- tered by a band-pass filter to derive the desired funda- mental frequency sine wave. The amplitude and frequency stable sine wave may be utilized in linear variable dif- ferential transformer (LVDT) apparatus for measuring the position of a controlled object such as a turbine valve. The arrangement may also be utilized for generating addi- tional sine waves bearing some predetermined phase rela- tionship with respect to one another for other control or signal processing applications.
456561
Ottobre Louis G.
Shung Wu-Shi
Szabo Andras I.
Oldham And Company
Westinghouse Electric Corporation
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