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| Number | Title | Issue Date |
| 8044698 | Liquid level detection apparatus A liquid level detection apparatus includes a resistance plate which has a conducting pattern formed on a board, the conducting pattern including a first slide portion, a second slide portion, a plus electrode electrically connected to the first slide portion, and a... | 10/25/2011 |
| 7868682 | Insulating communication circuit According to an embodiment of the present invention, an insulating communication circuit includes a first insulating circuit 62#11 having first and second circuits, a second insulating circuit 62#12 having third and fourth circuits, and a communication... | 01/11/2011 |
| 7541857 | Comparator offset cancellation assisted by PLD resources An impedance compensation circuit for inputs of a programmable device includes programmable impedance circuits connected with input nodes. The programmable impedance circuits can be configured to apply a compensating voltages to input nodes to reduce or eliminate un... | 06/02/2009 |
| 7397295 | Active current cancellation for high performance video clamps An apparatus comprising a first circuit, a second circuit and a third circuit. The first circuit may be configured to generate a video input signal having a voltage. The second circuit may have a finite input resistance configured to generate a current in response t... | 07/08/2008 |
| 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 |
| 7366244 | Method and system for antenna interference cancellation A wireless communication system can comprise two or more antennas that interfere with one another via free space coupling, surface wave crosstalk, dielectric leakage, or other interference effect. The interference effect can produce an interference signal on one of ... | 04/29/2008 |
| 7362107 | Systems and methods for automatically eliminating imbalance between signals A calibrating system for automatically eliminating or reducing imbalance between a first signal and a second signal is disclosed. The calibrating system includes: a programmable delay module, receiving to the first and the second signals; a phase detecting module, c... | 04/22/2008 |
| 7340184 | Linearized Optical Transmitter Using Feedback Control Apparatus and methods for linearizing an optical transmitter are described. A linearized optical transmitter according to the present invention includes a modulator bias voltage supply that biases an optical modulator. The optical modulator modulates an optical sign... | 03/04/2008 |
| 7320145 | Glove reinforcement, in particular a goalkeeper glove The invention relates to a reinforcement (2) for a glove (17), in particular a goalkeeper glove comprising a) an arrangement (3) of several interconnected first elements (3a to 3f), b) several second elements (4a | 01/22/2008 |
| 7266159 | Frequency-dependent magnitude pre-distortion on non-baseband input signals for reducing spurious emissions in communication networks Pre-distortion, whose magnitude—and preferably phase—are frequency-dependent, is applied to a non-baseband input signal in order to reduce spurious emissions resulting from subsequent amplification of the signal. In preferred embodiments, the pre-distortion tech... | 09/04/2007 |
| 7253694 | Temperature compensated oven controlled crystal oscillator A method provides a temperature controlled frequency source. The method reduces the effects of temperature variations on an operating frequency of the temperature controlled frequency source by temperature compensating the temperature controlled frequency source. | 08/07/2007 |
| 7251293 | Digital pre-distortion for the linearization of power amplifiers with asymmetrical characteristics An input signal is pre-distorted to reduce spurious emissions resulting from subsequent signal amplification. Frequency-dependent pre-distortion is preferably implemented in combination with frequency-independent pre-distortion, where the frequency-dependent pre-dis... | 07/31/2007 |
| 7248092 | Clamp circuit device In a clamp circuit device, reference voltages are set up by a series circuit of an FET, a resistor and an FET. Gate potentials of FETs are set up by performing addition and subtraction of these reference voltages and a reference voltage generated by a bandgap refere... | 07/24/2007 |
| 7248642 | Frequency-dependent phase pre-distortion for reducing spurious emissions in communication networks A frequency-dependent phase pre-distortion technique is applied to an input signal in order to reduce spurious emissions resulting from subsequent amplification of the signal. In preferred embodiments, the frequency-dependent phase pre-distortion of the present inve... | 07/24/2007 |
| 7248846 | Feedforward amplifier and radio communication apparatus with the amplifier An amplifier comprises a first amplifier circuit which amplifies a first signal to output an amplified first signal, a circuit which outputs a second signal corresponding to a difference between the first signal and the amplified first signal, a second amplifier cir... | 07/24/2007 |
| 7218687 | Receiver with baseline wander correction and correction method thereof A receiver with baseline wander correction for correcting a received input signal. The receiver includes first and second biasing resistor networks configured to receive first and a second signal of the received input signal, and to produce a first correction signal... | 05/15/2007 |
| 7215144 | Pre-emphasis driver with constant impedance An apparatus and method is disclosed for transmitting signals over a signal conductor using a precompensated driver that does not use a current source, and which drives the signal conductor with an impedance similar to the characteristic impedance of the signal cond... | 05/08/2007 |
| 7208992 | Lossy linearizers for analog optical transmitters System and method for even order and odd order nonlinear distortion of a compensating signal that removes substantially all of the nonlinear distortion in one order or in two orders. Two or more diodes are arranged in at least one of an anti-series configuration and... | 04/24/2007 |
| 7205807 | Cascode signal driver with low harmonic content A method and apparatus for minimizing harmonic content in a digital signal driver circuit are disclosed. A digital input signal applied to an input node generates a corresponding digital output in a circuit with two or more MOS devices in cascode connection with eac... | 04/17/2007 |
| 7206360 | Amplitude deviation correction circuit A novel amplitude deviation correction circuit which corrects an amplitude deviation between an I signal and a Q signal is disclosed. An average amplitude deviation between an I signal amplified by a variable gain amplifier and a Q signal amplified by another variab... | 04/17/2007 |
| 7197085 | Frequency-dependent magnitude pre-distortion for reducing spurious emissions in communication networks Pre-distortion, whose magnitude—and preferably phase—are frequency-dependent, is applied to an input signal in order to reduce spurious emissions resulting from subsequent amplification of the signal. In preferred embodiments, the pre-distortion technique of the... | 03/27/2007 |
| 7194012 | Laser driver circuit for externally modulated lasers Systems and methods for biasing an externally modulated laser. An inductorless bias T network is provided that includes a terminating resistor in series with a capacitor. The capacitor is an open circuit for a bias signal and a virtual ground for an RF signal. Thus,... | 03/20/2007 |
| 7164738 | Signal canceling method and device In a signal cancellation method and device which can cancel input signals quickly and reliably (stably), an input signal is split into a first and second signal. The second signal is split into mutually orthogonal first and second subsignals which are recombined aft... | 01/16/2007 |
| 7149257 | Digital predistortion system and method for correcting memory effects within an RF power amplifier A system and method of correcting memory effects present within power amplifiers using digital predistortion and an improved power amplifier system employing digital predistortion are disclosed. Nonlinearities within a power amplifier having an input derived from a ... | 12/12/2006 |
| 7145405 | Planar high frequency oscillator A planar harmonic high frequency oscillator comprises a pair of amplifiers for oscillation, a micro-strip line for connecting between inputs of the pair of amplifiers and between outputs of the amplifiers, a slot line disposed between the inputs and the outputs of t... | 12/05/2006 |
| 7135891 | Current sense shunt resistor circuit Current through a wire is sensed with a shunt resistor and a sense resistor in a current divider circuit. The values of the shunt resistor and sense resistor are related to provide a specified gain ratio to increase a dynamic range of current measurement. The sense ... | 11/14/2006 |
| 7123676 | Method and system for antenna interference cancellation A wireless communication system can comprise two or more antennas that interfere with one another via free space coupling, surface wave crosstalk, dielectric leakage, or other interference effect. The interference effect can produce an interference signal on one of ... | 10/17/2006 |
| 7113606 | Adjustable harmonic distortion detector and method for using the same There is provided an adjustable harmonic distortion detector that includes a clock signal source, means for the detection of a first period of evaluation, and means for the detection of a second period of evaluation. The detector has the characteristic that a first ... | 09/26/2006 |
| 7106131 | Amplifying circuit An amplifying circuit includes a differential amplifier having a positive input end, a negative input end, a positive output end, and a negative output end; a first input impedance coupled between the negative input end and a first input signal; a second input imped... | 09/12/2006 |
| 7098755 | High power, high linearity and low insertion loss single pole double throw transmitter/receiver switch A high performance single-pole-double-throw (SPDT) Transmitter/Receiver (T/R) FET switch utilizes a plurality of multi-gate FETs in series to realize low insertion loss, low harmonic distortion and high power handling capabilities. The SPDT switch consists of an ant... | 08/29/2006 |
| 7095264 | Programmable jitter signal generator A programmable jitter signal generator is provided that includes a jitter distribution control unit, a selection unit in signal communication with the jitter distribution control unit, and a delay unit in signal communication with the selection unit; and a correspon... | 08/22/2006 |
| 7095799 | Systems and methods for providing baseband-derived predistortion to increase efficiency of transmitters Systems and methods for providing baseband predistortion within a transmitter. In a simplified embodiment, the transmitter contains a main signal path that receives an input signal and generates a main signal in response thereto. A filter in the main signal path is ... | 08/22/2006 |
| 7092180 | Asymmetry correction for magneto-resistive heads An asymmetry-reducing circuit adapted to process an input signal having positive and negative pulses of different amplitudes and generate a corresponding balanced signal having positive and negative pulses of substantially uniform amplitudes. The asymmetry-reducing ... | 08/15/2006 |
| 7061994 | Methods and apparatus for I/Q imbalance compensation Methods and apparatus for performing amplitude and phase imbalance correction operations on in-phase and quadrature phase signal components corresponding to a received signal are described. The imbalance correction operations relay on the use of relatively simple to... | 06/13/2006 |
| 7054610 | Wireless terminal device In a cellular telephone provided with a receiving circuit of a direct conversion type, a passive low-pass filter is arranged between a mixer for an I-channel and a base band circuit for removing interference waves of or above a channel next to a channel neighboring ... | 05/30/2006 |
| 7050388 | Method and system for crosstalk cancellation Signals propagating in one communication channel can generate crosstalk interference in another communication channel. A crosstalk cancellation device can process the signals causing the crosstalk interference and generate a crosstalk cancellation signal that can co... | 05/23/2006 |
| 7049860 | Method and circuit for controlling a resistance of a field effect transistor configured to conduct a signal with a varying voltage The present invention relates to a replica network for linearizing switched capacitor circuits. A bridge circuit with a MOSFET resistor disposed in a resistor branch of the bridge circuit is provided. A noninverting terminal of an operational amplifier is connected ... | 05/23/2006 |
| 7046971 | Distortion-correcting circuit, integrated circuit, and radio communication device To down size a distortion-correcting circuit. In the case of a distortion-correcting circuit 1, a basic-wave-amplifying section 10 and a distortion-extracting section 20 have the same circuit configuration. Therefore, the basic-wave-amplifying s... | 05/16/2006 |
| 7030693 | Enhanced predistortion method and apparatus A method may include determining a power level of a signal and a temperature level of a transmitter originating the signal. At least one of the power and temperature levels may be compared to a lookup table containing predistortion coefficients. The method is capabl... | 04/18/2006 |
| 7026880 | Quadrature VCO using symmetrical spiral inductors and differential varactors A quadrature VCO includes two cross-coupled differential pairs, two parallel LC tank circuits, two LO units and a plurality of source followers, supplying by a tail current source and a tail capacitor. The LC tank circuit constitutes of symmetrical spiral inductors ... | 04/11/2006 |
