Abstract: A circuit comprising an oscillator configured to provide a first output signal in response to one or more input signals. A divider circuit may be configured to receive the first output signal of the oscillator circuit and to present a signal having a second frequency at a second output. A frequency comparator circuit may receive the second output signal and an external signal having a third frequency and may present a third output signal representing control information. A processor circuit may be coupled to the oscillator circuit, the divider circuit and the comparator circuit. The processor circuit may control the frequency of oscillation of the first output.

Abstract: A circuit for presenting one or more current source outputs which may be used to optimize the interface between optical components in a computer system. The multiple currents may be independently varied in each particular component to provide a current adjustment for proper functioning of a wide variety of LEDs and photo transistors. As a result, a dynamic optimization of the devices is provided. Since the present invention allows a wide variety of optical components to be used, the overall cost of implementing the device may be reduced.

Abstract: A circuit and method for synchronizing a data signal to one of a plurality of clocks. The clock may include (i) a pulse generator configured to generate two pulses separated by a delay, (ii) a clock generator configured to generate the plurality of clocks, and (iii) a logic circuit configured to select the clock for synchronizing the data signal.