Digital resolvers

Claim 1

A DIGITAL RESOLVER FOR RESOLVING DIGITAL INFORMATION AS REPRESENTED BY AN INCREMENTAL PULSE TRAIN INTO A RESOLVED SINE COMPONENT REPRESENTED BY A PULSE OUTPUT PROPORTIONAL IN ACCORDANCE WITH THE ANGULAR SETTING OF AN INPUT CONTROL MEMBER, SAID RESOLVER COMPRISING: AN INPUT AND AN OUTPUT, SAID INPUT BEING COUPLED TO RECEIVE SAID INCREMENTAL PULSE TRAIN; FIRST AND SECOND BINARY SCALING MEANS COUPLED TO SAID INPUT, EACH BINARY SCALING MEANS HAVING A FIRST STAGE FOR GIVING OUTPUT PULSES FOR EACH ALTERNATE INPUT PULSE AND A PLURALITY OF SERIALLY ARRANGED SUCCESSIVE STAGES FOR GIVING OUTPUT PULSES FROM EACH ALTERNATOR PULSE FROM THE PRECEDING STAGE; FIRST AND SECOND GATING MEANS COUPLED TO RECEIVE THE OUTPUTS FROM SAID FIRST AND SECOND BINARY SCALING MEANS; A FIRST ANGULAR ENCODER COUPLED TO SAID INPUT CONTROL MEMBER; SAID FIRST ANGULAR ENCODER HAVING A PLURALITY OF POSITIONS CORRESPONDING TO COARSE STEPS OF ANGLE WITHIN A QUADRANT; FLIP-FLOP MEANS COUPLED TO SAID RESOLVER INPUT AND FEEDING ALTERNATE INPUT PULSES TO SAID FIRST AND SECOND BINARY SCALING MEANS; DIODE MATRIX MEANS COUPLED TO SAID FIRST ANGULAR ENCODER AND CONDITIONING SAID FIRST GATING MEANS TO PASS TO SAID RESOLVER OUTPUT A PROPORTION OF THE NUMBER OF RECEIVED PULSES CORRESPONDING TO THE SINE OF A FIRST COARSE ANGULAR STEP NEXT BELOW SAID INPUT ANGLE AND CONDITIONING SAID SECOND GATING MEANS TO PASS A PROPORTION OF THE NUMBER OF RECEIVED PULSES CORRESPONDING TO THE DIFFERENCE BETWEEN THE SINES OF THE TWO COARSE ANGULAR STEPS ON EITHER SIDE OF SAID INPUT ANGLE, THE SINE OF SAID FIRST COARSE ANGULAR STEP BEING LESS THAN THAT OF SAID INPUT ANGLE; A SECOND ANGULAR ENCODER COUPLED TO SAID FIRST ANGULAR ENCODER; SAID SECOND ANGULAR ENCODER HAVING A PLURALITY OF POSITIONS CORRESPONDING TO FINE STEPS OF ANGLE WITHIN A COARSE STEP AS REPRESENTED BY SAID FIRST ANGULAR ENCODER, SAID FIRST AND SECOND ANGULAR ENCODERS BEING COUPLED TO SAID INPUT MEMBER SUCH THAT THE SUM OF THEIR ANGULAR INDICATIONS REPRESENTS SAID INPUT ANGLE; THIRD GATING MEANS COUPLED TO THE OUTPUT OF SAID SECOND GATING MEANS; FURTHER DIODE MATRIX MEANS COUPLED TO SAID SECOND ANGULAR ENCODER AND TO SAID THIRD GATING MEANS; SAID FURTHER DIODE MATRIX MEANS CONDITIONING SAID THIRD GATING MEANS TO PASS TO SAID OUTPUT A FRACTION OF THE PULSES FROM SAID SECOND GATING MEANS, SAID FRACTION BEING LINEARLY RELATED TO THE SETTING OF SAID SECOND ENCODER; WHEREBY THE NUMBER OF PULSES AT SAID OUTPUT IS PROPORTIONED, WITH RESPECT TO SAID INCREMENTAL PULSE TRAIN IN ACCORDANCE WITH THE SINE OF SAID INPUT ANGLE; POLARITY CONTROL MEANS COUPLED TO SAID RESOLVER OUTPUT; AND QUADRANT SENSING MEANS SENSING THE QUADRANT OF SAID INPUT ANGLE AND CONTROLLING SAID POLARITY CONTROL MEANS TO PROVIDE OUTPUT PULSES OF A SELECTED POLARITY CORRESPONDING TO THE SIGN OF THE SINE OF SAID INPUT ANGLE.