A circuit according to some embodiments of the invention includes a first differential to single ended translator having a first output, a second differential to single ended translator having a second output, and a latch coupled to the first output and the second output, where the latch is configured to select the slower of the first output and the second output. In some embodiments a memory cell has a contact element coupled between a surface of the fin and the memory element. The Hall effect sensors provide three electrical angles of the motor rotor which are used in an angular displacement signal processor that is implemented in hardware and software. Also the LED lamp board is embedded into the slots in the inner wall of the tubular plastic lampshade, resulting in convenient and quickly installation, and material saving. The sleeve may be made from different materials and may be made of multiple pieces.