A method and apparatus are provided for smoothing jitter in a smoothed clock output by routing a portion of the incoming clock signal representing phase hit information through a digital high-pass filter (12), which produces complementary output digital signals. One of the output signals includes the higher order bits of the filtered phase hit signal, and the other output signal includes the lower order bits of the filtered phase hit signal. The filtered, complementary phase hit signals are summ...

A testing apparatus for detecting an image from an image signal in radio waves leaking from an information processing system. The information processing system uses horizontal and vertical synchronizing signals to display the image. The testing apparatus includes a radio wave receiving mechanism which receives the radio waves. An image signal detecting mechanism detects the image signal from the received radio waves and a synchronizing signal receiving mechanism receives the horizontal and verti...

A semiconductor mesa structure including active, absorbing, or passive guide layer is surrounding laterally by insulating mask, and is buried by a cladding layer which extends over the insulating mask, and injected current flows through the cladding layer into the mesa structure without leakage from the cladding layer into a substrate so that the semiconductor optical device is improved in performance.