A clock receiver circuit converts low amplitude, differential clock signal components received from a differential clock distribution medium into a full swing digital clock. The apparatus comprises a furnace, or series of furnaces in side-by-side arrangement. These artifacts are caused by the abrupt changes in the Fourier domain due to the sharp edges of the phase plate in the diffraction plane. Also, it is possible to manufacture a three-axis accelerometer and a three-axis gyroscope on a single wafer by the same process, to be integrated as a six-axis inertial sensor. The switching circuit stops operations when receiving the backlight-off signal, and reactivates the PWM circuit after receiving the backlight-on signal.