Pico Systems

Resolver to Quadrature Converter

the Resolver to Quadrature Converter


  • Allows you to keep resolvers on machine, especially where they are very small, or integrated into the motor.
  • Produces differential A, B and Z outputs just like an encoder.
  • Has fault detection logic that can open the E-stop chain upon a failure, broken cable, or power loss.

The Resolver Converter interfaces to magnetic resolvers used on some machine tools for position feedback, and produces the same signals produced by common quadrature encoders. It fits on a 3 x 3.5" PC board and requires only 5 V at 250 mA for power. Jumpers are provided to vary the excitation of the resolver to meet the requirement of the AD resolver converter chip, which requires an input level of 3.6 V p-p. Due to the way resolvers are built, there is some loss of signal amplitude, so you will have to determine the correct jumpers that give the required drive level.

Pico Systems is currently delivering this board at an end-user cost of US $150.


Excitation Frequency 10 KHz (jumper adjustable)
Angular Accuracy +/- 22 Arc Minutes
Angular resolution 4096 counts/electrical revolution
Maximum Velocity 1000 Revolutions/Second
Settling Time 5 ms

Connector Pinouts for the Resolver Converter board

Mechanical Drawing of the Resolver Converter board
Note the holes clear a 4-40 screw.

Price List

You can contact Pico Systems at :
(314) 965-5523
543 Lindeman Rd.
Kirkwood,  MO  63122