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 |
| 8183902 | Methods and systems for digital pulse width modulator In one embodiment, the digital pulse width modulator of these teachings includes comparators and a number of phases and capable of increasing resolution without increasing clock frequency. In another embodiment, the digital pulse width modulator (DPWM) of these teac... | 05/22/2012 |
| 8143927 | Pulse control device A pulse control device is maintained with a constant pulse width corresponding to a change of process or temperature. The pulse control device comprises a fuse set for selectively outputting a delay increase signal and a delay decrease signal that have a different s... | 03/27/2012 |
| 8138810 | Method and apparatus for pulse width modulation An apparatus and method of providing a pulse width modulated signal that is responsive to a current are disclosed. A circuit according to aspects of the present invention includes a capacitor to convert a first current to a first voltage on the capacitor during a fi... | 03/20/2012 |
| 8120401 | Methods and systems for digital pulse width modulator In one embodiment, the digital pulse width modulator of these teachings includes comparators and a number of phases and capable of increasing resolution without increasing clock frequency. In another embodiment, the digital pulse width modulator (DPWM) of these teac... | 02/21/2012 |
| 8081022 | Data processing system for clipping correction A device (100) for processing data, the device (100) comprising an integrator unit (103, 104) adapted for integrating an input signal (V1) and a correction unit (101, 102) adapted for correcting a clipping integrator unit (1... | 12/20/2011 |
| 8054119 | System and method for on/off-chip characterization of pulse-width limiter outputs The present invention provides for a method for characterization of pulse-width limiter outputs. A known clock signal is received. A pulse width of the received known clock signal is limited through a first pulse-width limiter to generate a first intermediate signal... | 11/08/2011 |
| 8018260 | Compensation of degradation of performance of semiconductor devices by clock duty cycle adaptation The device degradation of integrated circuits may be compensated for by appropriately adapting the duty cycle of the clock signal. For this purpose, a correlation between the duty cycle and the overall performance characteristics of the integrated circuit may be est... | 09/13/2011 |
| 7986178 | Pulse width modulation driver for electroactive lens An electroactive lens driver generates a variable root-mean-square drive voltage for controlling an electroactive lens by controlling the duty cycle of a modified square wave. ... | 07/26/2011 |
| 7973580 | Semiconductor device A semiconductor device includes: a voltage-control-type clock generation circuit having a plurality of stages of first delay elements and whose oscillation frequency is controlled according to a control voltage applied to the first delay elements; a delay circuit ha... | 07/05/2011 |
| 7961021 | Pulse control device A pulse control device is maintained with a constant pulse width corresponding to a change of process or temperature. The pulse control device comprises a fuse set for selectively outputting a delay increase signal and a delay decrease signal that have a different s... | 06/14/2011 |
| 7961020 | Digital signal converter A digital signal converter (CNV) converts a digital input signal (PCM) into a pulse width modulated signal (PWM), which is a binary signal that comprises pulses of varying width. The digital signal converter can operate in a signal mode and a transition mode. In the... | 06/14/2011 |
| 7915938 | Multi-channel digital pulse width modulator (DPWM) A multiple channel Digital Pulse Width Modulator (DPWM) can include a single delay locked loop with a delay line, the delay line producing a number of outputs. Circuitry can use a delay line mask to mask a portion of the delay line outputs to produce a modified outp... | 03/29/2011 |
| 7893743 | Controlled power converter A pulse modulated converter comprising an input stage (1) for generating a first control signal (2) based on an input signal (3) and a first feedback signal (4), and a comparator (5) for generating a pulse width modulated signal ( | 02/22/2011 |
| 7880522 | Double-edge PWM controller and its control method thereof The present invention discloses a double-edge pulse width modulation (PWM) controller based on the output current and output voltage which is modulated in real time by the output current and the output voltage. The controller uses an extra first adder to sum up the ... | 02/01/2011 |
| 7880523 | Method and apparatus for pulse width modulation An apparatus and method of providing a pulse width modulated signal that is responsive to a current are disclosed. A circuit according to aspects of the present invention includes a capacitor to convert a first current to a first voltage on the capacitor during a fi... | 02/01/2011 |
| 7855586 | Frequency jitter generator and PWM controller A frequency jitter generator and a frequency jitter PWM controller are provided for overcoming the shortcoming that a conventional PWM controller reduces the electromagnetic interference issue by means of varying the operating frequency of the PWM controller based o... | 12/21/2010 |
| 7852134 | Circuit for controlling pulse width of auto-refresh signal and circuit for generating internal row address for auto refresh A circuit for controlling a pulse width of a refresh signal is provided. The circuit includes a first pulse width controller for receiving a first refresh signal having a first enable period, and generating a second refresh signal having a second refresh signal, and... | 12/14/2010 |
| 7791387 | Fine-resolution edge-extending pulse width modulator Fine resolution pulse width modulation is achieved through feed-forward edge extending logic. A ring-oscillator produces phase-shifted versions of a system clock and two latches operate in parallel with the system clock output from the multiplexer clocking a first l... | 09/07/2010 |
| 7772902 | PWM buffer circuit for adjusting a frequency and a duty cycle of a PWM signal A PWM buffer circuit includes a duty cycle converting circuit and a frequency-fixed PWM signal generating circuit. The duty cycle converting circuit is used for receiving a first PWM signal and then generating a duty cycle reference voltage on the basis of the first... | 08/10/2010 |
| 7772903 | Pulse width modulation circuit capable of linearly adjusting duty cycle with voltage and related method A pulse width modulation circuit capable of linearly adjusting duty cycle with voltage, which comprises an input voltage source for generating an input voltage, a regulator for generating a regulated voltage, a first voltage-dividing unit for providing a first divid... | 08/10/2010 |
| 7750702 | Pulse generation circuit and UWB communication device A pulse generation circuit for outputting to an output terminal (OT) includes an inverter delay circuit (IDC) for processing a start signal with a predetermined delay; a first switching circuit (SC) adapted to connect the OT to a first voltage when a logical product... | 07/06/2010 |
| 7724054 | Gate driver with programmable dead-time insertion A dead-time generator for incorporation in an integrated circuit wherein the integrated circuit includes a high side and low side gate driver and wherein the high side and low side gate driver drive output switches such that a dead-time is provided between on times ... | 05/25/2010 |
| 7710174 | Digital pulse-width modulator based on non-symmetric self-oscillating circuit A low-power digital pulse-width modulator (DPWM) architecture for high frequency dc-dc switch-mode power supplies (SMPS) is disclosed that is well-suited for integration in power management systems of small handheld devices. The DPWM can operate in a stand-alone mod... | 05/04/2010 |
| 7667511 | Efficient pulse amplitude modulation transmit modulation Efficient PAM transmit modulation is provided by a PAM modulator that includes an oscillator (404) that provides a clock signal, CKV, (408). The clock signal 408 and a delayed version (CKV_DLY) 420 of the clock signal are provided to a lo... | 02/23/2010 |
| 7667512 | Duty cycle comparator A duty cycle comparator is described for comparing the duty cycles of two digital signals. The duty cycle comparator comprises a first controllable current source, a second controllable current source and a charge accumulation device. The comparator provides an outp... | 02/23/2010 |
| 7639055 | PWM signal generator After an output signal S4 is level-inverted, first and second shorting FETs 55, 56 as a level-inversion inhibiting circuit inhibit level-inversion so that the signal is maintained to the inverted state. Thereafter the inhibition of level-inversion is r... | 12/29/2009 |
| 7629823 | Method and apparatus for pulse width modulation An apparatus and method of providing a pulse width modulated signal that is responsive to a current are disclosed. A circuit according to aspects of the present invention includes a capacitor to convert a first current to a first voltage on the capacitor during a fi... | 12/08/2009 |
| 7622973 | Pulse control device Provided is a pulse control device is maintained with a constant pulse width corresponding to a change of process or temperature. The pulse control device comprises a fuse set for selectively outputting a delay increase signal and a delay decrease signal that have a... | 11/24/2009 |
| 7616038 | Clock modulation circuit for correcting duty ratio and spread spectrum clock generator including the same A clock modulation circuit includes a modulation block that receives a fixed clock generated from a reference clock and buffers the fixed clock so as to generate a modulated clock. A correction unit is provided in the modulation block to correct the duty ratio of th... | 11/10/2009 |
| 7583120 | Power supply controller and method therefor In one embodiment, an error amplifier of a power supply controller is configured to receive a current sense signal prior to the current sense signal undergoing amplification. ... | 09/01/2009 |
| 7573309 | Waveform width adjusting circuit with selective control delay Disclosed is waveform width adjusting circuit that comprises: a delay circuit having a prescribed delay time is provided in a signal propagation path and a delay adjusting circuit which applies an adjustment in such a manner that when a waveform width extending from... | 08/11/2009 |
| 7557629 | Pulse stream generator A system and method for generating a pulse stream are disclosed. A ramp signal is generated. The ramp signal is compared with a Time of Transition signal to produce a result indicative of the comparison. Responsive to the result of the comparison, the pulse stream s... | 07/07/2009 |
| 7554372 | Digital dead-time controller for pulse width modulators Dead-time gaps are inserted into one of two output transistor control signals from a digital pulse width modulator by controlling the leading and trailing edges using the same phase-division and dithering signals employed by the digital pulse width modulator. Adders... | 06/30/2009 |
| 7528640 | Digital pulse-width control apparatus A digital pulse-width control apparatus including an input module, a digital delay locked loop, a plurality of programmable delay circuits connected in series, and a pulse-width modulation module is provided. The present invention uses the input module to vary a clo... | 05/05/2009 |
| 7525357 | Circuit and method for adjusting a voltage drop An integrated circuit includes a circuit for adjusting a voltage drop. The circuit includes a reference voltage node, an output node and a driver circuit coupled between the reference voltage node and the output node. The driver circuit includes an impedance causing... | 04/28/2009 |
| 7498857 | Circuit arrangement and method for generating a square wave signal A circuit for generating a square wave signal (UN2) comprising a DC voltage source (UG), a driver stage (TS), which alternately connects a control node (SK) to ground (GND) or the DC voltage (UG), a diode (D1) and a first capacitor (C1), which a... | 03/03/2009 |
| 7495490 | Digital amplifier and method thereof An apparatus includes a first trigger, a second trigger, a pulse generator, and a control unit. The first trigger generates a first trigger signal and a first level signal; the second trigger generates a second trigger signal and a second level signal; the pulse gen... | 02/24/2009 |
| 7477084 | Multi-phase power supply controller and method therefor In one embodiment, a power supply controller is configured to use a plurality of ramp signals to generate a plurality of PWM control signals. ... | 01/13/2009 |
| 7471132 | Reduced voltage pre-charge multiplexer An electronic device selects one of a plurality of input signals for coupling to an output channel. Individual pulldowns provide a separate pathway for each input, and are coupled to a common node which: is pre-charged to a voltage less than a system voltage. Each p... | 12/30/2008 |
| 7471133 | Modulator circuit with linear and non-linear control A modulator control circuit including a linear control circuit, a non-linear control circuit, and a combiner. The linear control circuit has an input receiving a compensation signal indicative of an output parameter and an output providing a first control signal. Th... | 12/30/2008 |
