Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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| Number | Title | Issue Date |
| 8076921 | Self-regulating power supply for micro electronic mechanical systems thermal actuators Systems and methods for a self-regulating power supply for MEMS thermal actuators to achieve maximum actuator displacement while preventing over powering. The present invention includes a power supply configured to regulate electrical input power to a MEMS thermal a... | 12/13/2011 |
| 7808224 | High-frequency power supply circuit To accurately regulate output of a high-frequency power with a simple configuration. A high-frequency power supply circuit includes: a basic drive square wave generation circuit unit (5) for generating a basic drive square wave having an output frequency; a d... | 10/05/2010 |
| 7433800 | System and method for measuring performance of a voltage regulator module attached to a microprocessor A system for measuring performance of a voltage regulator module (VRM) attached to a microprocessor includes: a voltage transient tester (VTT) fixture (5) for setting different working voltage levels of the VRM; an oscillograph (2) for measuring transi... | 10/07/2008 |
| 7276861 | System and method for driving LED A system drives one or plurality of LEDs regulating their brightness by controlling LEDs average current or voltage. The system includes a switching power converter and an integrated digital regulator with at least one of electrical, thermal and optical feedbacks. T... | 10/02/2007 |
| 7092795 | Turbine apparatus and governor for turbine In a turbine apparatus comprising a runner rotatable to be rotationally driven by a water, a gain of a derivative calculation element generating a derivative component of a control signal for controlling a flow rate of the water which derivative component is to be a... | 08/15/2006 |
| 7072744 | Turbine apparatus and governor for turbine In a turbine apparatus comprising a runner rotatable to be rotationally driven by a water, a gain of a derivative calculation element generating a derivative component of a control signal for controlling a flow rate of the water which derivative component is to be a... | 07/04/2006 |
| 6919811 | Charger detection and enable circuit A detection circuit is configured to detect the presence of a power source by comparing two input voltages (VIN1, VIN2). An example detection circuit is arranged, such that the first input voltage (VIN1) may operate above the process limit for t... | 07/19/2005 |
| 6868293 | System and method for energy usage curtailment A system and method are disclosed for performing energy usage management within a network. The system may include an energy management system, such as a thermostat device, that may be associated with an energy consuming entity, such as a residence. A server may be r... | 03/15/2005 |
| 6859021 | Circuit arrangement for controlling a power supplied to a load A circuit for controlling the power supplied to a load. The circuit includes a controlled self-conducting semiconductor switch (4) connected in-series with the load (2). Further, a first energy storage circuit (9a) is provided in-series w... | 02/22/2005 |
| 6711189 | Automatic power control and laser slope efficiency normalizing circuit Automatic power control (APC) is provided by a) a variable output voltage differential receiver/driver, which receiver is responsive to data signals for generating a voltage, the laser driver output voltage amplitude being controlled by a first potentiometer on an i... | 03/23/2004 |
| 6583894 | Power supply device and method utilizable in electronic apparatus A power supply device and power supply method that may be used with an electronic apparatus, such as a facsimile machine. In the device and method, a communication device is placed in a sleep mode while a copy process is conducted. During the sleep mode, ... | 06/24/2003 |
| 6366224 | Programmable voltage regulator The invention relates to programmable voltage regulator that programmably provides a desired operating voltage to a power pin based upon operating voltage configuration data. The programmable voltage regulator includes an operating voltage configuration d... | 04/02/2002 |
| 6361645 | Method and device for compensating wafer bias in a plasma processing chamber Disclosed is a method and device for compensating a bias voltage on a wafer disposed over an electrostatic chuck in a processing chamber of a plasma processing system. The plasma processing system includes an electrostatic and RF power supplies that are c... | 03/26/2002 |
| 6232893 | Method and apparatus for programmably providing a power supply voltage to an integrated circuit The invention relates to programmable voltage regulator that programmably provides a desired operating voltage to a power pin based upon operating voltage configuration data. The programmable voltage regulator includes an operating voltage configuration d... | 05/15/2001 |
| 5878089 | Coherent signal detector for AM-compatible digital audio broadcast waveform recovery A coherent signal detector for extracting analog and digital information from a received AM-compatible digital broadcast waveform is provided. The waveform can have an in-phase component and a quadrature component. The detector can include a down converte... | 03/02/1999 |
| 5514223 | Dual discharge photovoltaic module A dual discharge photovoltaic module responsive to high and low loads. The module includes a first plurality of series connected, high short circuit current cells, and a second plurality of series connected, low short circuit current cells connected in se... | 05/07/1996 |
| 5195108 | System and method for determining absolute phase of a differentially-encoded, phase-modulated signal System and method for determining an absolute phase value of a differentially-encoded, DQPSK signal. A stored set of sequences of an ID sequence is compared with a received ID-sequence of a differentially-encoded, DQPSK signal transmitted to the receiver.... | 03/16/1993 |
| 5001415 | Electrical power apparatus for controlling the supply of electrical power from an array of photovoltaic cells to an electrical head Electrical power transfer apparatus (40) for controlling the supply of electrical power fram an array of photovoltaic cells (41) to an electrical load (46) by means of a switching power converter (45). The switching power converter (45) is controlled by a... | 03/19/1991 |
| 4970453 | Solar charging system for an IC card having voltage current regulation An electronic apparatus such as an IC card is comprised of a power source including a secondary cell and solar cells which are connected in parallel to the secondary cell, an IC and a plurality of terminals inclusive of a power receiving terminal for cont... | 11/13/1990 |
| 4905056 | Superlattice precision voltage reference A precision voltage reference incorporating at least one superlattice resonant tunneling diode and support electronics. The precision voltage reference is stable as to temperature and radiation.... | 02/27/1990 |
| 4341607 | Solar power system requiring no active control device A solar power system has a photovoltaic array having a locus of peak power points for various insolation levels, a voltage-dependent variable resistance load such as a water electrolysis unit electrically connected to the array, and a demand-dependent var... | 07/27/1982 |
| 4321524 | Transistorized voltage limiter The invention relates to a transistorized voltage limiter as a dipole having in the conduction direction the characteristic similar to that of the Zener diode. When low voltage is involved, this transistorized voltage limiter can replace the Zener diode i... | 03/23/1982 |
| 4280088 | Reference voltage source A reference voltage source comprises a bridge network including two zener diodes and two resistors, two operational amplifiers and two switches whose inputs receive a control voltage from the source and whose outputs are coupled to non-inverting inputs of... | 07/21/1981 |
| 4099115 | Constant-voltage regulated power supply The temperature-dependent characteristics of a constant-voltage regulated power supply are determined by combining output voltages of a pair of circuits that have positive and negative temperature-dependent characteristics, respectively. One of the circui... | 07/04/1978 |
| 4091432 | Constant current-source with high voltage protection, compliance circuit A closed loop operational amplifier circuit for providing a constant current in the closed loop for generating a precision constant current through an unknown resistance for measuring the resultant voltage drop across the resistance. The closed loop circu... | 05/23/1978 |
| 3980931 | Over voltage protector An over voltage protector for AC power. Transistors are connected across the power line in a common base configuration with the transistor outputs being connected to the primary winding of an output transformer. A secondary winding of the output transform... | 09/14/1976 |
| 3967187 | Current limiting of noise diodes A current limiting circuit for a diode noise source improving noise output stability with changes in ambient operating temperature and variations in supply voltage.... | 06/29/1976 |
