| Patent Number |
Title Of Patent |
Date Issued |
| 4464661 |
System monitor circuit having first and second phase-sensitive demodulator circuits coupled to f |
August 7, 1984 |
| A pair of simple phase-sensitive full-wave high-gain demodulator circuits generate an output for both halves of an AC reference cycle. One of the demodulator circuits is utilized as an amplifier to drive, for example, the steering system servo valve in an aircraft steering system and the |
| 4238716 |
Miniature vehicle dispenser spin-up speed control system |
December 9, 1980 |
| A precision motor speed control system where a reference generator produces pulses for each revolution of a dispenser shaft, the time between pulses is measured and compared to a preselected standard, a time greater than standard will generate a pulse causing a transistor circuit to appl |
| 4006391 |
Linearized pulse width modulator |
February 1, 1977 |
| A typical alternating current two phase servomotor has two windings displaced 90.degree.; these windings are normally identified as the reference winding and the control winding. Rotational direction and speed of the motor may be controlled by applying AC voltages of the proper wavef |
