Abstract: A DC-DC converter includes a voltage converting block that converts an input supply voltage to an output voltage and includes a power switch turning on at on-time of a power driving signal, a power driving block that generates the power driving signal using an oscillation output signal, wherein a cycle of the power driving signal varies according to a cycle of the oscillation output signal and a length of the on-time of the power driving signal is fixed to a power time regardless of variation of the cycle of the oscillation output signal, a voltage-controlled oscillating block that generates the oscillation output signal, the cycle of which is controlled according to a level of an oscillation control signal, and a target tracking block that generates a feedback voltage and controls the level of the oscillation control signal such that a feedback voltage follows a target reference voltage.

Abstract: A DC-DC converter includes a voltage converting block that converts an input supply voltage to an output voltage and includes a power switch turning on at on-time of a power driving signal, a power driving block that generates the power driving signal using an oscillation output signal, wherein a cycle of the power driving signal varies according to a cycle of the oscillation output signal and a length of the on-time of the power driving signal is fixed to a power time regardless of variation of the cycle of the oscillation output signal, a voltage-controlled oscillating block that generates the oscillation output signal, the cycle of which is controlled according to a level of an oscillation control signal, and a target tracking block that generates a feedback voltage and controls the level of the oscillation control signal such that a feedback voltage follows a target reference voltage.

Abstract: A DC-to-DC voltage converter using switching frequency detection is provided. The DC-to-DC voltage converter includes a voltage conversion block including a power switch configured to be turned on in response to a power driving signal and to provide an input supply voltage to be output as the converted output voltage when the power switch is turned on, wherein the converted output voltage has a level that varies depending on a duty cycle of the power driving signal, and a switching control block that receives the converted output voltage and a feedback signal to control the duty cycle of the power driving signal based on a frequency of a feedback signal, the feedback signal having the same period as the power driving signal. Accordingly, when the level of the input supply voltage is changed, the converted output voltage can be recovered to the target level while the switching frequency of the power driving signal is maintained at the same value as before the change of the level of the input supply voltage.

Abstract: Systems and methods of driving multiple outputs are provided in which a single inductor may be used to drive multiple output such as independent strings of LEDs or white LEDs (WLEDs). In an example embodiment, a boost DC to DC converter may be used with a single inductor to drive multiple outputs. In an example embodiment, the error voltage of each of the multiple outputs is sampled during each cycle of the DC to DC converter and the largest error voltage is determined for that cycle. Power from the DC to DC converter is then supplied to that output during that cycle.

Abstract: Systems and methods of driving multiple outputs are provided in which a single inductor may be used to drive multiple output such as independent strings of LEDs or white LEDs (WLEDs). In an example embodiment, a boost DC to DC converter may be used with a single inductor to drive multiple outputs. In an example embodiment, the error voltage of each of the multiple outputs is sampled during each cycle of the DC to DC converter and the largest error voltage is determined for that cycle. Power from the DC to DC converter is then supplied to that output during that cycle.

Abstract: A pad calibration circuit with on-chip resistor. An integrated circuit with an impedance terminated output terminal is disclosed. A source is provided for sourcing current to the output terminal of the integrated circuit, which output terminal interfaces with a load having a finite impedance associated therewith. An on-chip source impedance is disposed internal to the integrated circuit and between the source and the output terminal to define the input impedance of the output terminal.

Abstract: A pad calibration circuit with on-chip resistor. An integrated circuit with an impedance terminated output terminal is disclosed. A source is provided for sourcing current to the output terminal of the integrated circuit, which output terminal interfaces with a load having a finite impedance associated therewith. An on-chip source impedance is disposed internal to the integrated circuit and between the source and the output terminal to define the input impedance of the output terminal.

Abstract: A signal generator 600 includes oscillator circuitry for generating first and second signals having a selected phase relationship and an interpolator 610 for interpolating between a phase of the first signal and a phase of the second signal to generate a third signal having a phase between the phases of the first and second signals.

Abstract: An apparatus comprising a first circuit and a second circuit. The first circuit may be configured to generate a differential intermediate signal in response to a differential input signal. The second circuit may be configured to generate one or more output signals in response to said differential intermediate signal.