Process and arrangement for regulating the keying ratio of at le

Details Process and arrangement for regulating the keying ratio of at le Process and arrangement for regulating the keying ratio of at le

1986-04-07

1988-04-19

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307529, 328155, 328162, H03K 513, H03K 522

Patent

active

047391979

ABSTRACT:
A process and apparatus for use in digital length or angle measuring systems for regulating the keying ratio of at least one periodic electrical signal. A signal is produced, proportional to the desired keying ratio, and compared with the periodic electrical signal. A momentary difference signal is generated from the comparison. If the frequency of the periodic electrical signal is within a selectable frequency range, the momentary difference signal is applied to a correction circuit, which is circuited parallel to a storage unit. The correction circuit supplies a correction signal, based on the momentary difference signal, to a sum amplifier. The sum amplifier is operative to superpose the correction signal on the periodic electrical signal, thereby regulating the keying ratio of the periodic electrical signal. The storage unit is operative to store a signal proportional to the difference signal. If the frequency of the periodic electrical signal is outside the selectable frequency, the correction signal is derived from the contents of the storage unit.

REFERENCES:
patent: 4388596 (1983-06-01), Yamashita
patent: 4463272 (1984-07-01), Tucker
patent: 4599570 (1986-07-01), Cloke
patent: 4641087 (1987-02-01), Coffield

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