Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 8102198 | Relay circuit, information processing apparatus, and relay method A relay circuit for relaying signal transmission between a first circuit driven by a first voltage and a second circuit driven by a second voltage different from the first voltage, the relay circuit includes: a waveform shaping circuit that obtains a shaped voltage ... | 01/24/2012 |
| 8035438 | Integrated circuits and methods for enabling high-speed AC-coupled networks to suppress noise during low-frequency operation An alternating-current (AC) coupling integrated circuit (IC) suppresses signal errors introduced by a steady-state input signal. The IC includes an operational amplifier, a true direct-current (DC) bias network, a complimentary DC-bias network and first and second f... | 10/11/2011 |
| 7999595 | Rectifying and level shifting circuit A circuit includes a differential circuit having at least to two inputs, a first variable impedance circuit, and a second variable impedance circuit. The first variable impedance circuit is between a first branch of the differential circuit and an output. The first ... | 08/16/2011 |
| 7982520 | Signal generating apparatus and test apparatus Provided is a signal generating apparatus that outputs from an output end thereof an output voltage corresponding to input data supplied thereto, comprising: a DA converter that outputs a voltage corresponding to data supplied thereto; a capacitor section that is pr... | 07/19/2011 |
| 7710179 | Programmable gain attenuator for track and hold amplifiers A programmable gain attenuator (PGA) in particular to be used in a track-and-hold circuit is disclosed. The PGA is located in the feedback path around an operational amplifier. One tap switch is used to connect one PGA section to the output of the operational amplif... | 05/04/2010 |
| 7382166 | Signal amplification device A signal amplification device which uses inexpensive standard CMOS and yet is capable of high-accuracy threshold setting. An offset voltage generator detects the direct-current level of an input signal, and generates a positive or negative offset voltage signal. A p... | 06/03/2008 |
| 7375574 | Semiconductor device A semiconductor device includes a differential level converter circuit that receives a first signal and outputs a second signal of greater amplitude. The differential level converter has a first MISFET pair for receiving the first signal, a second MISFET pair for en... | 05/20/2008 |
| 7376358 | Location specific optical monitoring An optical spike is generated at an arbitrarily selected location within an arbitrary optical link. The optical spike is generated by deriving a spike signal having a plurality of components, and launching the spike signal into the a transmitter end of the optical l... | 05/20/2008 |
| 7360005 | Software programmable multiple function integrated circuit module An electrically programmable multiple selectable function integrated circuit module has a plurality of optionally selectable function circuits, which receive and manipulate a plurality of input data signals. The outputs of the plurality of optionally selectable func... | 04/15/2008 |
| 7352229 | Reference clock receiver compliant with LVPECL, LVDS and PCI-Express supporting both AC coupling and DC coupling A reference clock receiver structure according to the invention is provided. The structure preferably includes an input buffer that is formed from a PMOS differentiated pair of transistors and a first supply voltage. The PMOS differential pair receives a pair of dif... | 04/01/2008 |
| 7342434 | Semiconductor device including capacitor having decoupling capacity A capacitor has a MOS gate structure in which a gate insulating film is held between a gate terminal and a ground terminal as a dielectric. A switch unit is connected between the gate terminal and a power supply. The ground terminal is connected to a ground. A switc... | 03/11/2008 |
| 7330005 | Motor driving circuit In a motor driving circuit in which a first NMOS and a second NMOS coupled in series to the final output stage to drive a motor are driven and a common node of the source of the first NMOS and the drain of the second NMOS serves as the final output, the motor drivin... | 02/12/2008 |
| 7323912 | Half-bridge driver and power conversion system with such driver A half-bridge driver includes first and second power switches, connected with their respective current paths in series, a pulse generator for generating a voltage pulse waveform, arranged to drive the first power switch, a first current generator for generating a cu... | 01/29/2008 |
| 7323924 | Level shifter circuit A low-power consumption level shifter circuit is provided by preventing a through current which is generated when a level of a signal is changed. In order to prevent a through current which flows when a level of a signal of the input is changed, the p-channel TFTs a... | 01/29/2008 |
| 7319310 | Regulated power supply unit An improved power supply unit includes a DC power source having a positive terminal and a negative terminal, and a voltage regulating circuit that includes a plurality of elements coupled in series between the positive and negative terminals of the DC power source t... | 01/15/2008 |
| 7310012 | Voltage level shifter apparatus A voltage level shifter apparatus is provided. The voltage level shifter apparatus includes a first dynamic-bias generator, a second dynamic-bias generator, and a level supply circuit. The first dynamic-bias generator dynamically outputs a first bias signal, wherein... | 12/18/2007 |
| 7305027 | Receiver and the compensation method therefor This invention discloses a receiver and a signal compensation method therefor. An adaptive equalizer and a baseline wander compensator are provided on the front end of the receiver to improve the quality of output signals. The signal compensation method enables the ... | 12/04/2007 |
| 7289115 | LCOS automatic bias for common imager electrode A circuit for automatically biasing a common electrode of a liquid crystal on silicon imager comprising an imager with a common electrode and a plurality of cells. A varying voltage signal is provided to the plurality of cells. A low pass filter is coupled between t... | 10/30/2007 |
| 7271755 | Resistor ladder interpolation for PGA and DAC A voltage interpolation circuit includes a resistive ladder connected between ground and a voltage input and having a plurality of resistors with voltage taps between the resistors. An amplifier (optionally) has first and second capacitors connected together at thei... | 09/18/2007 |
| 7262650 | Amplitude adjusting circuit An amplitude adjusting circuit comprises a first current mirror where a variable current of a variable current source is copied into each of 1st-3rd transistors; a second current mirror where the variable current is copied into each of 11th-13th transistors; a third... | 08/28/2007 |
| 7245170 | Attenuator and portable telephone terminal apparatus using the same Provided are: at least one or more series variable resistors implemented by field effect transistors connected to a signal line A; and at least one or more shunt variable resistors implemented by field effect transistors connected between a signal outputting section... | 07/17/2007 |
| 7245895 | Attenuator with switch function and mobile telephone terminal device using the same A high frequency part, which amplifies a high frequency signal outputted from an intermediate frequency part and supplies to an antenna, is equipped with a gain controller with switch function. The gain controller with switch function comprises an attenuator with sw... | 07/17/2007 |
| 7218443 | Generation of tunable light pulses A device for generating tunable light pulses has a non-linear optical fiber. The optical spectrum of femtosecond light pulses can be modified by this optical fiber, taking advantage of solitonic effects. In order to make available such a device, which makes it possi... | 05/15/2007 |
| 7202645 | Regulated power supply unit An improved power supply unit includes a DC power source having a positive terminal and a negative terminal, and a voltage regulating circuit that includes a plurality of elements coupled in series between the positive and negative terminals of the DC power source t... | 04/10/2007 |
| 7199664 | Integrated switchless programmable attenuator and low noise amplifier An integrated receiver with channel selection and image rejection substantially implemented on a single CMOS integrated circuit is described. A receiver front end provides programable attenuation and a programable gain low noise amplifier. Frequency conversion circu... | 04/03/2007 |
| 7190220 | Circuit for providing a base operating voltage for a bipolar transistor and amplifier circuit A circuit for providing a base operating voltage for a bipolar transistor includes a UBE multiplier providing, in response to a working-point control current, a working voltage fed to a circuit for reducing the working voltage in order to generate a base ... | 03/13/2007 |
| 7180310 | Amplitude varying driver circuit and test apparatus There is provided an amplitude varying driver circuit operable to output an output signal, which is an amplified input signal being supplied. The amplitude varying driver circuit includes: a plurality of differential amplifiers provided in parallel with one another,... | 02/20/2007 |
| 7167045 | System and method for modifying output power of an information communication system A system for communicating information includes a variable gain amplifier (VGA) responsive to an input signal and a gain control signal for controlling a gain of the VGA. The system also includes a power amplifier responsive to the VGA. An output power level of the ... | 01/23/2007 |
| 7167027 | Latch-type level converter and receiver circuit accurately amplifying low-amplitude signals and receiving common-mode input signals higher than a supply voltage A latch-type level converter has a signal-input transistor, a latch, and a clock-input transistor. The signal-input transistor, which is a high-voltage transistor, receives an input signal, and the latch holds data of the input signal received by the signal-input tr... | 01/23/2007 |
| 7167041 | Voltage buffer for capacitive loads A voltage buffer for capacitive loads isolates the load from the feedback loop. Using a variation of a follower arrangement, a second transistor outside of the feedback loop introduced. The current to the load is supplied through the second transistor, which is conn... | 01/23/2007 |
| 7161405 | Level shift circuit A level shift circuit includes first and second inverters and an inversion circuit. The first inverter has a first input terminal and a first output terminal for generating the output signal. The first inverter includes a first transistor having a first current driv... | 01/09/2007 |
| 7157988 | Voltage controlled resistor and a controlling method The invention discloses a new and original voltage variable resistor VVR with input and output ports and a first input and second input for control signals to set the impedance between the input and output ports as desired over a certain range and, thus, to optimize... | 01/02/2007 |
| 7151400 | Boost-biased level shifter A boost-biased level shifter is described. In the preferred embodiments of the present invention, a voltage divider circuit divides the high voltage applied on the receiver circuit that receives the input signal, a refresh and self-bias circuit maintains and refresh... | 12/19/2006 |
| 7135921 | Differential circuit, amplifier circuit, driver circuit and display device using those circuits A differential circuit and an amplifier circuit for reducing an amplitude difference deviation, performing a full-range drive, and consuming less power are disclosed. The circuit includes a first pair of p-type transistors and a second pair of n-type transistors. A ... | 11/14/2006 |
| 7135910 | Charge pump with fibonacci number multiplication A charge pump includes a plurality of capacitors that are alternately charged and serially coupled. When serially coupled, the voltage across a given capacitor will equal the voltage at its negative terminal and the voltage across the preceding capacitor. ... | 11/14/2006 |
| 7116160 | Booster A booster includes a boosting circuit and a feedback control circuit. The boosting circuit is used to boost an input voltage into a predetermined output voltage; the feedback control circuit detects the output voltage of the boosting circuit and stops boosting the v... | 10/03/2006 |
| 7116956 | Power oscillator for control of waveshape and amplitude An RF power oscillator for contactless card antennas shapes a carrier signal at the operating frequency utilizing a delay circuit having a number of taps for delaying the carrier signal by different lengths of time. The delayed signals are input into a buffer and ou... | 10/03/2006 |
| 7111029 | Random number generating circuit A random number generating circuit can generate random numbers with high randomness, and can be made as a compact integrated circuit. The random number generating circuit includes an uncertain logic circuit having a flip-flop type logic circuit that gives digital ou... | 09/19/2006 |
| 7102410 | High voltage level converter using low voltage devices A circuit for converting an input signal at a first voltage level to an output signal at a second voltage level uses only thin oxide transistors. The circuit includes a first unit operating at a first power supply voltage and receiving the input signal, a second uni... | 09/05/2006 |
| 7102416 | High side switching circuit A high side switching circuit, comprising: a switching transistor; a charge pump drive circuit including a circuit for generating an oscillating signal; and a charge pump arranged to provide a gate drive voltage to the switching transistor in response to a control s... | 09/05/2006 |
