Abstract: A current limit circuit regulates the current flow through a power switch 90 by measuring the current through the switch 90 and comparing it to a reference voltage VREF that represents the limit current. When the current through the power switch 90 is greater than the limit current, the current in the power switch 90 is pulled lower by a driver circuit 92 which controls the power switch 90. By using a current limit reference voltage that has two levels, the power switch 90 has two current limit thresholds. Using a comparator 94 to compare the input voltage of the power switch 90 to the output voltage of the power switch 90, an output signal is generated to control the current limit threshold. When the input voltage and output voltage has a large differential voltage, a lower current limit threshold voltage is selected. When the input voltage and output voltage has a small differential voltage, an upper limit threshold voltage is selected.

Abstract: A low gain feedback compensation circuit is provided on an integrated circuit. The feedback compensation circuit is coupled to a step down power supply on the integrated circuit. The step down power supply is operable to receive an input voltage and to generate an output voltage based on the input voltage. The feedback compensation circuit includes a line regulation circuit. The line regulation circuit is operable to receive the input voltage and a reference voltage. The line regulation circuit is also operable to generate an offset voltage based on the input voltage and the reference voltage.

Abstract: An apparatus for providing a signal having a controlled transition characteristic at an output terminal includes: (A) A signal comparing unit having a plurality of input loci and at least one output locus, receiving a first signal at a first input locus and receiving a second signal at a second input locus. The signal comparing unit presents at least one gating signal having a value depending on relative values of the first signal and the second signal at the at least one output locus. (B) A switching unit coupled with the at least one output locus and receiving the first signal and the second signal. The switching unit switchingly controlling coupling of the first signal or of the second signal with the output terminal in response to the at least one gating signal.

Abstract: An apparatus for generating a supply voltage includes a first regulator for generating a first supply voltage, a second regulator for generating a second supply voltage, and a feedback circuit to control the second regulator.

Abstract: A current limit circuit regulates the current flow through a power switch 90 by measuring the current through the switch 90 and comparing it to a reference voltage VREF that represents the limit current. When the current through the power switch 90 is greater than the limit current, the current in the power switch 90 is pulled lower by a driver circuit 92 which controls the power switch 90. By using a current limit reference voltage that has two levels, the power switch 90 has two current limit thresholds. Using a comparator 94 to compare the input voltage of the power switch 90 to the output voltage of the power switch 90, an output signal is generated to control the current limit threshold. When the input voltage and output voltage has a large differential voltage, a lower current limit threshold voltage is selected. When the input voltage and output voltage has a small differential voltage, an upper limit threshold voltage is selected.

Abstract: An apparatus for generating a supply voltage includes a first regulator for generating a first supply voltage, a second regulator for generating a second supply voltage, and a feedback circuit to control the second regulator.

Abstract: A low gain feedback compensation circuit is provided on an integrated circuit. The feedback compensation circuit is coupled to a step down power supply on the integrated circuit. The step down power supply is operable to receive an input voltage and to generate an output voltage based on the input voltage. The feedback compensation circuit includes a line regulation circuit. The line regulation circuit is operable to receive the input voltage and a reference voltage. The line regulation circuit is also operable to generate an offset voltage based on the input voltage and the reference voltage.

Abstract: A hot swappable system includes a first system having an electrically conductive projection and a second system. The second system includes a voltage source having a first node having a first polarity, a resistive element, and a receptor system associated with the first node and configured to receive insertion of the conductive projection. The receptor system includes first and second conductive contacts electrically connected by the resistive element. The first conductive contact is disposed relative to the second conductive contact such that insertion of the conductive projection into the receptor system causes sequential electrical contact between the conductive projection and the first contact and then between the conductive projection and the second contact.

Abstract: Recurrent paroxysmal neuropsychiatric disorders selected from (1) acute dystonic reactions, (2) seizure disorders and (3) panic disorders may be treated by means of aerosol inhalation of (1) anticholinergic and/or antihistaminic agents, (2) benzodiazepines and (3) antihistaminic agents, respectively.