Quotables
"I watched his countenance closely, to see if he was not deranged ... and I was assured by other senators after he left the room that they had no confidence in it."
U.S. Senator Smith of Indiana ; After seeing Samuel Morse demonstrate the telegraph.
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| Number | Title | Issue Date |
| 7424060 | Transformer data coupler with high common mode immunity A data coupler comprises two CMOS drivers which are supplied with a data signal and a delayed version of the data signal to drive a primary winding of a transformer with narrow pulses of opposite polarity corresponding to respective edges of the data signal. A secon... | 09/09/2008 |
| 7365559 | Current sensing for power MOSFETs A power MOSFET, comprising main and current mirror MOSFETs, has a current sense resistance coupled between its mirror and source terminals and a monitoring circuit responsive to a first voltage dependent upon current through the current sense resistance. The circuit... | 04/29/2008 |
| 7332358 | MOSFET temperature sensing A MOSFET has its gate voltage controlled to provide a constant drain current of the MOSFET, for example to limit inrush current for charging a capacitance of a power supply arrangement. A decrease in the gate voltage supplied to the MOSFET, corresponding to an incre... | 02/19/2008 |
| 7135789 | Controlling devices using cascaded control units Power supplies, supplied with an input voltage to produce output voltages, are controlled in a desired sequence, and their output voltages are monitored, by respective state machines of two or more control units which are coupled in cascade by a bidirectional signal... | 11/14/2006 |
| 7078971 | Class AB CMOS amplifiers A class AB output stage of a CMOS amplifier has a level-shifting voltage follower constituted by a level-shifting transistor and a current source. A bias circuit replicates the level-shifting voltage follower in a feedback arrangement to produce a variable bias volt... | 07/18/2006 |
| 7080273 | Sequencing power supplies on daughter boards Power supplies are enabled and disabled in sequence by a controller in dependence upon output voltages of the power supplies monitored by the controller. The controller allows proper sequencing of the power supplies when one or more of them is provided on a daughter... | 07/18/2006 |
| 7071838 | Coupling signals via a coupling arrangement A power supply controller has two control units for coupling to primary and secondary sides of controlled power supplies, the units being coupled via a transformer which couples signals between the units, a power supply voltage for the secondary-side unit being deri... | 07/04/2006 |
| 6924990 | Power supply arrangements A switch mode power supply and its start-up circuit produce a controlled output voltage from an input voltage. A power supply control circuit is powered by the output voltage and is responsive to the output voltage to control the power supply. The control circuit re... | 08/02/2005 |
| 6917226 | Transformer coupling arrangement and method using a plurality of drivers A signal is coupled from the primary to the secondary of a transformer, to a signal receiver which has a supply voltage derived from the signal via a rectifier arrangement including a filter capacitor. A plurality of signal drivers on the primary side have their out... | 07/12/2005 |
| 6911746 | Signal and power transformer coupling arrangements An isolating coupling arrangement couples signals in both directions via a transformer between first and second (or more) units each having differential signal transmit buffers and receivers. A diode bridge and capacitor produce an isolated power supply voltage for ... | 06/28/2005 |
| 6771518 | DC converters In a DC converter, a transformer has a first winding coupled in series with a first capacitor and a first switch between a first pair of terminals, and a second winding coupled in series with a second capacitor and an inductor between a second pair of terminals. A s... | 08/03/2004 |
