A series of low-cost dc sine/cosine synchro or resolver converters can drive up to three torque receivers with accuracy within ±15 minutes of arc. Packaged on a 4.5- by 9.25-in. pc card, these ...

The SD-100 series solid-state synchro/resolver-to-dc (S/R-to-dc) converters transform three-phase synchro or two-phase resolver inputs into dc-sine and -cosine outputs at 400 conversions per second.

For sine and cosine signals, the two secondaries are wound 90-deg apart in the stator. A rotating magnetic coupling transfers energy from the stator to the rotor.