Digital to synchro converter

Claim 1

AN ARRANGEMENT FOR CONVERTING A BINARY DIGITAL INTPUT CORRESPONDING TO AN ANGLE INTO A SINUSOIDAL FUNCTION OF THE ANGLE COMPRISING IN COMBINATION: LOGIC MEANS RECEIVING SAID INPUT, DETERMINING THE PARTICULAR QUADRANT OF THE ANGLE; A REGISTER COUPLED TO THE LOGIC MEANS INCLUDING A PLURALITY OF FLIP-FLOPS THEREIN WHICH WILL BE SEPARATELY ACTUATED TO THEIR ONE OR OTHER FLIP-FLOP POSITION DEPENDING ON THE SIGNAL FROM THE LOGIC MEANS; A PARALLEL BASE RESISTOR NETWORK INCLUDING A LADDER OF A PLURALITY OF BASE BINARY RESISTORS WITH SWITCH MEANS RESPONSIVE TO SAID REGISTER SO AS TO INSERT ANY ONE OR MORE OF SAID BASE RESISTORS INTO THE NETWORK SO AS TO SUPPLY BASE SINUSOIDAL VALUES IN RESPONSE TO FLIP-FLOP SIGNALS FROM THE REGISTER; A CORRECTION NETWORK RESPONSIVE TO SAID BASE RESISTOR NETWORK OUTPUT, SAID CORRECTION NETWORK INCLUDING A PLURALITY OF PARALLEL CORRECTION RESISTORS AND A PLURALITY OF GATING CIRCUITS CONTROLLING WHICH OF SAID CORRECTION RESISTORS IS IN THE NETWORK IN RESPONSE TO INPUTS FROM SAID REGISTER, SAID CORRECTION RESISTORS ADJUSTING THE SINUSOIDAL VALVE SUPPLIED TO THE TRUE VALVE WHEN MORE THAN ONE BASE RESISTOR IS IN THE NETWORK; A FINE RESISTOR NETWORK HAVING A LADDER OF FINE BINARY PARALLEL RESISTORS WITH SWITCH MEANS RESPONSIVE TO SAID REGISTER SO AS TO INSERT ANY ONE OR MORE OF SAID FINE RESISTORS INTO THE NETWORK SO AS TO SUPPLY FINE VALUES BETWEEN SUCCEEDING BASE VALVE AND BINARY COMBINATIONS THEREOF; AN ATTENUATION RESISTOR NETWORK CONNECTED TO SAID BASE AND FINE RESISTOR NETWORKS TO APPORTION THE FINE VALUES SUPPLIED BY THE FINE RESISTORS BETWEEN THE VALUES SUPPLIED BY SUCCEEDING BASE RESISTORS AND BINARY COMBINATIONS THEREOF AND A PLURALITY OF GATING CIRCUITS CONNECTED BETWEEN SAID REGISTER AND SAID ATTENUATION RESISTOR NETWORK CONTROLLING WHICH OF SAID ATTENATION RESISTORS IS IN THE NETWORK IN RESPONSE TO INPUTS FROM SAID REGISTER; AND SWITCH MEANS RESPONSIVE TO SAID LOGIC MEANS TO FEED IN A.-C. POWER IN PROPER PHASE TO SAID NETWORKS DEPENDING ON THE QUADRANT OF THE ANGLE, THE PHASE OF THE POWER SUPPLIED TO THE CORRECTION NETWORK BEING 180* OUT OF PHASE WITH THE SUPPLIED TO THE REST OF THE NETWORK.