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fpga4fun.com - Quadrature Decoder |
 | | Quadrature signals are signals generated with a 90 degrees phase difference. |
| | Since it is easier to create a quadrature decoder (in an FPGA) than a serial or PS2 interface, I modified the mouse and replaced the original IC with a quad-buffers Schmitt trigger inputs IC. |
| | This circuit is sometimes called "4x decoder" because it counts all the transitions of the quadrature inputs. |
| www.fpga4fun.com /QuadratureDecoder.html (311 words) |
