Analog to digital converter for providing the digital representa

Details Analog to digital converter for providing the digital representa Analog to digital converter for providing the digital representa

1977-09-14

1979-04-10

Ruggiero, Joseph F.

Boots, shoes, and leggings

340347NT, 340347SY, 364603, 364830, 340347AD, G06G 722, H03K 1302

Patent

active

041492609

ABSTRACT:
A system for determining the value of an angle represented by first and second analog signals having amplitudes which are a function of the SIN and COS of the angle. The SIN and COS signals are full wave demodulated in such a manner that the demodulated signals are always of opposite polarity and the smaller of the two signals is continuously integrated in an integrator while the larger of the two signals is sample data integrated in the integrator to maintain the output of the integrator within predefined upper and lower limits. Angle computation is then performed as a function of the ratio of the number of complete half cycles of the demodulated signals during a fixed time interval plus the change in the output of the integrator since the previous time interval.

REFERENCES:
patent: RE28833 (1976-05-01), Dorey
patent: 3839716 (1974-10-01), Reichnebacher
patent: 3896431 (1975-07-01), Dickinson
patent: 3930252 (1975-12-01), Storar
patent: 4024533 (1977-05-01), Neumann
patent: 4031533 (1977-06-01), Neumann

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