Quotables
"Rail travel at high speeds is not possible because passengers, unable to breathe, would die of asphyxia."
Dionysius Lardner, Professor of Natural Philosophy and Astronomy at University College, London ; 1830
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7417462 | Variable external interface circuitry on programmable logic device integrated circuits A programmable logic device (“PLD”) includes circuitry for optionally and variably modifying characteristics of an input signal in any of several respects. Examples of such modifications include AC coupling the signal into the PLD, low pass filtering the signal ... | 08/26/2008 |
| 7397287 | Sample hold circuit and multiplying D/A converter having the same A sample hold circuit includes an op-amp, first capacitors provided on an inverting side of the op-amp and second capacitors provided on a non-inverting side. The sample hold circuit is configured such that a total capacitance of the first and second capacitors to w... | 07/08/2008 |
| 7385427 | Sample-and-hold circuits having reduced channel conductance variation and methods of operation thereof An electronic device, such as a sample-and-hold circuit, includes a field effect transistor (FET), a capacitor, and a voltage offset circuit. The FET is configured to receive a signal at a first terminal thereof and selectively provide the signal to a second termina... | 06/10/2008 |
| 7321751 | Method and apparatus for improving dynamic range in a communication system An apparatus for improving dynamic range includes a frequency down-conversion module that receives an input signal and a bias circuit. The bias circuit includes a first resistor and a second resistor. The first resister has a first terminal coupled to a bias point a... | 01/22/2008 |
| 7292071 | Method and circuit for sampling/holding a signal A circuit and method thereof for sampling/holding signal is provided. The signal sampling/holding circuit comprises a first signal sampling/holding device, a second signal sampling/holding device, a target signal and a reference voltage. First, the first signal samp... | 11/06/2007 |
| 7252085 | Device for inhalation therapy The invention relates to a device for inhalation therapy. Said device comprises an aerosol-producing device for spraying a liquid (3), preferably comprising a membrane (1), a support unit (6), an electromechanical transducer unit (7), and... | 08/07/2007 |
| 7250795 | High-speed, low-power input buffer for integrated circuit devices A high-speed, low-power input buffer for an integrated circuit device in which the input voltage (VIN) is coupled to both a pull-up and a pull-down transistor. In accordance with a specific embodiment, the input buffer utilizes a reference voltage input (VREF) durin... | 07/31/2007 |
| 7250806 | Apparatus and method for generating an output signal that tracks the temperature coefficient of a light source An apparatus and method for generating an output signal that tracks the temperature coefficient of a light source are provided. A light source temperature coefficient tracking mechanism (e.g., a current source circuit) that generates an output signal, which tracks t... | 07/31/2007 |
| 7231084 | Color data image acquistion and processing A method and structure for implementing color image acquisition and processing. Combined and direct interpolation and conversion from a first to a second color space of sensor color data provided to a device capable of receiving and displaying color image data, foll... | 06/12/2007 |
| 7215159 | Comparator, sample-and-hold circuit, differential amplifier, two-stage amplifier, and analog-to-digital converter A comparator includes a sampling capacitor, a first switching unit which is connected to an input end of the sampling capacitor and which applies an input signal to the input end of the sampling capacitor, a second switching unit which is connected to the input end ... | 05/08/2007 |
| 7183954 | Circuits, systems and methods for volume control in low noise 1-bit digital audio systems A data converter including a digital volume control for continuously scaling a received stream of digital audio data by a selected factor and a low noise delta-sigma modulator for re-quantizing a scaled digital data stream output from the digital volume control.... | 02/27/2007 |
| 7164377 | Multiplexed voltage reference strategy for codec A shared voltage reference circuit for a codec is shown that includes a voltage reference circuit for producing a reference voltage. A first sample and hold circuit has a first capacitor coupled to an output of the voltage reference circuit through a first switch co... | 01/16/2007 |
| 7120555 | Signal statistics determination A signal can be analysed to determine statistical characteristics indicative of, for example, the predictability or time reversibility of the signal. The signal is examined to locate events corresponding to the crossing of predetermined levels with predetermined slo... | 10/10/2006 |
| 7102557 | Switched capacitor DAC The present invention relates to digital to analog converters, and especially but not exclusively to switched capacitor digital to analog converters (DACs) for digital audio signals. The present invention provides a switched capacitor DAC for converting a digital si... | 09/05/2006 |
| 7091751 | Low-power and low-noise comparator having inverter with decreased peak current Low-power and low-noise CDS (correlated double sampling) comparators for use with a CIS (CMOS image sensor) device are provided. A CDS comparator is constructed using one of various low-power inverters that provide decreased instantaneous transition currents at a lo... | 08/15/2006 |
| 7088147 | Sample and hold circuits and methods with offset error correction and systems using the same A sample and hold circuit including a sampling capacitor for storing a sample of an input signal, an output stage for outputting the sample stored on the sampling capacitor; and input circuitry for sampling the input signal and storing the sample on the sampling cap... | 08/08/2006 |
| 7075340 | Solid-state imaging device A first bias voltage to be applied to a drain portion of a MOS transistor and a pulse voltage pulsating with a predetermined potential difference are being generated by an apparatus incorporating the MOS transistor. Voltage generation means generates a second bias v... | 07/11/2006 |
| 7061413 | Analog to digital conversion with offset cancellation An analog to digital conversion circuit includes a voltage-to-charge converter coupled to a charge integrator and a comparator. The voltage-to-charge converter is coupled to, and converts the voltage of, an analog signal or one of a set of reference voltages, into a... | 06/13/2006 |
| 7049855 | Area efficient waveform evaluation and DC offset cancellation circuits Analog circuits for providing one or more waveform parameters, e.g., the DC offset or average, of an analog input signal. Separate biasing is not necessarily required. Some embodiments comprise field-effect-transistors (FETs) configured in various diode-connected co... | 05/23/2006 |
| 7046048 | Clock loss detection and switchover circuit In one aspect, an embodiment provides a clock loss sense and switchover circuit and method in which clock switchover is responsive to loss of a primary signal and to additional switch command signaling. In another aspect, an embodiment provides a clock loss sense ci... | 05/16/2006 |
| 7046046 | Switched capacitor signal scaling circuit A signal scaling circuit for accurately reducing the effective amplitude of an input signal by a rational factor N/M, where N and M are integers and N | 05/16/2006 |
| 6970038 | Switching scheme to improve linearity and noise in switched capacitor stage with switched feedback capacitor A switch capacitor amplifier using a “bottom plate sampling” type arrangement in the feedback network to mitigate the reduction in linearity due to feedback switch charge injection. The switch (18A) connecting the feedback capacitor (Cf) to the opamp (... | 11/29/2005 |
| 6965258 | Sample-and-hold with no-delay reset An integrated circuit having a sample-and-hold device is provided, which can be operated in successive cycles which each include a sample phase and a hold phase. During a sample phase a first storage device is charged to a voltage value proportional to an analog inp... | 11/15/2005 |
| 6965333 | Circuit for using capacitor voltage divider in a delta-sigma digital-to-analog converter to generate reference voltage An improved circuit for a delta-sigma digital-to-analog converter comprises integrating operational amplifier, sampling capacitors, integrating capacitor, and a voltage divider consisting of a plurality of sampling capacitors. Three trigger signals of different phas... | 11/15/2005 |
| 6956519 | Switched capacitor circuit of a pipeline analog to digital converter and a method for operating the switched capacitor circuit A switched capacitor circuit of a pipeline analog to digital converter. The pipeline ADC includes a clock generator, a signal reference circuit, and a plurality of switched capacitor circuit. Each switched capacitor includes an operational amplifier, a first samplin... | 10/18/2005 |
| 6734710 | Circuit arrangement for pulse generation The invention relates to a circuit arrangement for pulse generation, having a capacitor, to which a charging current and a discharging current may be supplied in succession. To generate the charging current and the discharging current, there are provided a current s... | 05/11/2004 |
| 6566916 | Chopper type comparator A chopper type comparator includes an input switch circuit which inputs an input voltage and a reference voltage alternately in response to a control signal; and an output terminal which supplies an output voltage, having a level defined based on the diff... | 05/20/2003 |
| 6515612 | Method and system to reduce signal-dependent charge drawn from reference voltage in switched capacitor circuits A circuit includes a first capacitor having a first terminal coupled to a first node having a first potential during a first time interval, and is coupled to a second node at a reference voltage during a second time interval. The first capacitor has a sec... | 02/04/2003 |
| 6487625 | Circuit and method for achieving hold time compatability between data-source devices coupled to a data-requesting device through a data bus A circuit and method for achieving hold time compatibility between data-source devices coupled to a data-requesting device through a data bus is provided. The circuit is made up of an impedance coupled to the data bus, and the value of that impedance is s... | 11/26/2002 |
| 6323697 | Low distortion sample and hold circuit A circuit 100, which can be used to perform a sample and hold function, includes a switch 112 with a current patch coupled between an input node VIN and an output node VOUT. A capacitor 114 is coupled to the output node VOUT. A replica device 160 includes... | 11/27/2001 |
| 6310507 | Timing generation circuit for electro-optic sampling oscilloscope The present invention relates to an electro-optic sampling oscilloscope which carries out measurement of a measured signal using an optical pulse generated based on a timing signal from a timing generation circuit. The timing generation circuit includes a... | 10/30/2001 |
| 6259296 | Voltage comparator An analog voltage comparator for suppressing an input voltage offset is described. The voltage comparator includes: a first and a second input comparator, both operating in opposite phases, and third comparator coupled to the two input comparators. The ci... | 07/10/2001 |
| 6252436 | Method and arrangement for determining state information of power semiconductor A method and arrangement for determining state information of a high-power semi-conductor, the power semiconductor comprising a collector (C), an emitter (E) and a gate (G), and a gate driver (3) comprising an auxiliary voltage input is connected to the g... | 06/26/2001 |
| 6147522 | Reference voltage circuitry for use in switched-capacitor applications Circuitry for selectively sampling a reference voltage with a capacitor 403 includes a first switch 505a for selectively coupling capacitor 403 to a source of a first reference signal during a first operating phase and a second switch 505b for selectively... | 11/14/2000 |
| 6140841 | High speed interface apparatus The present invention discloses a much higher speed interface apparatus which comprises a data driving means for decoding two-bit data signals using them as inputs to output four-level data signals; a reference voltage generating means for generating thre... | 10/31/2000 |
| 6057713 | Method and apparatus for performing voltage sampling Method and apparatus for performing voltage sampling. The present invention addresses the problems encountered when a voltage is applied to a voltage sampling circuit (76). An additional capacitor (88) is used to store an amount of charge similar to the a... | 05/02/2000 |
| 5973517 | Speed-enhancing comparator with cascaded inventors A speed-enhancing comparator with cascaded inverters is disclosed. The comparator comprises: a first capacitor, a first inverter, and a first switch, wherein the first switch and the first inverter are connected in parallel, and a first terminal of the fi... | 10/26/1999 |
| 5959469 | Chopper comparator showing high speed and low power operations free of malfunction under variation of logical threshold voltage of invertor A chopper comparator for comparing an analog input signal voltage and a comparative reference voltage comprises the following elements. First and second input terminals are provided for receiving the analog input signal voltage and the comparative referen... | 09/28/1999 |
| 5936434 | Voltage comparator and A/D converter An object is to obtain a voltage comparator capable of high-accuracy voltage comparison. An input voltage (VIN) and a reference voltage (VREF) are connected to one electrode of a capacitor (C1) through switches (S1) and (S2), respectively. The other elect... | 08/10/1999 |
| 5936437 | Analog-to-digital converter with capacitor network Link capacitors are used to establish connection between joining-points of coupling capacitors and inverters in an inverter chopper comparator array, in order to reduce injected electric charge variation due to feedthrough. Some of the comparators in the ... | 08/10/1999 |
