Abstract: In one aspect, an operational amplifier is configured to form a quiescent current that is a ratio of a current of a current source of the operational amplifier and to provide a load current to a load that is not ratioed to the current of the current source.

Abstract: In one exemplary embodiment, a multi-chip connector is formed to have a first conductive strip that is attached to a first semiconductor die and a second conductive strip that is attached to a second semiconductor die.

Abstract: In one embodiment, a semiconductor package structure includes a conductive bridge having coupling portions on opposing ends. A lead frame includes alignment or receiving features for receiving the coupling portions of the bridge. A semiconductor device is attached to both the conductive bridge and the lead frame, and is configured so that the coupling portions are on opposing sides of the semiconductor device.

Abstract: In one embodiment, a switching power supply controller decouples the power supply controller from receiving a sense signal during one portion of the operation of the power supply controller and couples the switching power supply controller to receive the sense signal during another portion of the operation.

Abstract: In one embodiment, a semiconductor device is formed in a body of semiconductor material. The semiconductor device includes a charge compensating trench formed in proximity to active portions of the device. The charge compensating trench includes a trench filled with various layers of semiconductor material including opposite conductivity type layers.

Abstract: A fan speed control system (200) for an electronic equipment enclosure comprises means for determining temperature (201, 202, 203, 210, 211) at a plurality of locations within the enclosure, means for determining operating parameters (201, 202, 203, 212) for the fan control system, means for setting operating speed (201) of at least one cooling fan, and means for exchanging information signals (205, 217, 218) relating to fan speed control system operation with an external controller. A method is also provided for controlling fan speed for an electronic equipment enclosure comprising the steps of determining temperature at a plurality of locations within the enclosure, determining operating parameters for the fan control system, setting operating speed of at least one cooling fan, and exchanging information signals relating to fan speed control system operation with an external controller.

Abstract: In one embodiment, a start-up controller for a PWM power supply controller is formed to generate a current that is substantially constant for changes in temperature and for changes in an output voltage received by the start-up controller.

Abstract: In one embodiment, a power supply controller is configured to use a plurality of ramp signals to generate a plurality of PWM control signals.

Abstract: In one embodiment, an electronic device package (1) includes a leadframe (2) with a flag (3). An electronic chip (8) is attached to the flag (3) with a die attach layer (9). A trench (16) having curved sidewalls is formed in the flag (3) in proximity to the electronic chip (8) and surrounds the periphery of the chip (8). An encapsulating layer (19) covers the chip (8), portions of the flag (3), and at least a portion of the curved trench (16). The curved trench (16) reduces the spread of die attach material across the flag (3) during chip attachment, which reduces chip and package cracking problems, and improves the adhesion of encapsulating layer (19). The shape of the curved trench (16) prevents flow of die attach material into the curved trench (16), which allows the encapsulating layer (19) to adhere to the surface of the curved trench (16).

Abstract: A power supply monitoring system generates a monitor signal having information on more than one aspect of the power supply output. In one example embodiment, the monitor signal may be implemented as a square wave in which the duty cycle is proportional to output current, the peak amplitude is proportional to output voltage, and the average value is equal to output power.

Abstract: In one embodiment, a split well region of one conductivity type is formed in semiconductor substrate of an opposite conductivity type. The split well region forms one plate of a floating capacitor and an electrode of a transient voltage suppression device.

Abstract: In one embodiment, a circuit is formed to couple a battery to a charging voltage at least a portion of a time when the charging voltage is greater than zero volts and is less than a first voltage value. The circuit is also formed to decouple the battery from the charging voltage approximately when the charging voltage is greater than the first voltage and also approximately when the charging voltage is no greater than zero volts.

Abstract: In one embodiment, a trench semiconductor device is formed to have an oxide of a first thickness along the sidewalls of the trench, and to have a greater thickness along at least a portion of a bottom of the trench.

Abstract: In one embodiment, a battery charger is configured to provide a normal charge current during a first time period and to supply a maintenance current after the first time period expires.

Abstract: In one embodiment, a multi-function signal sensor is configured to receive a signal having a plurality of states and to offset the input signal by a first amount for values of the input signal that are greater than a first value.

Abstract: In one embodiment, a PWM controller is configured to form a control signal that has reduced noise. The control signal is used to adjust a frequency of a clock signal of the PWM controller.

Abstract: In one embodiment, a semiconductor device is formed in a body of semiconductor material. The semiconductor device includes a counter-doped drain region spaced apart from a channel region.

Abstract: A power supply controller determines the value of an input power and uses the value of the input power to regulate a value of the output voltage.

Abstract: In one embodiment, a power supply controller uses a first clock of a first frequency to initiate a PWM cycle in a first operating mode and uses a second clock having a higher frequency to initiate a PWM cycle in a second operating mode.

Abstract: A power supply controller (10, 60, 70) uses a negative current (36) of a power transistor (16, 71) to detect the valley point for enabling the power transistor when driving an inductor (17). The negative current occurs when the inductor is de-magnetized and can be used for controlling the time to enable the power transistor.